Pub Date : 2022-10-02DOI: 10.1080/08957959.2022.2145562
F. Sun, Ying Li, Qiang He, Lei Liu, Zhigang Wang, Chaowen Xu, Yueju Cui, Yi Zhang, Q. Gong, J. Du
ABSTRACT Limestone mainly consisting of CaCO3 is one of the most abundant carbonates on Earth's surface. The sound velocities of limestone at high pressure were determined at room temperature using ultrasonic interferometry in a multi-anvil apparatus. Softening and discontinuities in compressional (P) and shear (S) wave velocities have been observed at around 1.45 GPa due to the phase transition of CaCO3-I to CaCO3-II, and the coexistence of CaCO3-IIIb and CaCO3-III stay up to ∼5 GPa. Limestone under CaCO3-I and CaCO3-III phase has much lower velocities and higher V P/V S ratio than most crustal and mantle minerals and the PREM model. Phase transitions from CaCO3-I to CaCO3-II cause the abrupt reduction of V P, V S, and V P/V S. The low velocities and high/low V P/V S ratio are well consistent with the seismology observed in the mantle wedge. The result suggests that the subduction of limestone into Earth's interior would cause low-velocity anomalies in mantle wedges.
{"title":"Sound velocity anomalies of limestone at high pressure and implications for the mantle wedge","authors":"F. Sun, Ying Li, Qiang He, Lei Liu, Zhigang Wang, Chaowen Xu, Yueju Cui, Yi Zhang, Q. Gong, J. Du","doi":"10.1080/08957959.2022.2145562","DOIUrl":"https://doi.org/10.1080/08957959.2022.2145562","url":null,"abstract":"ABSTRACT Limestone mainly consisting of CaCO3 is one of the most abundant carbonates on Earth's surface. The sound velocities of limestone at high pressure were determined at room temperature using ultrasonic interferometry in a multi-anvil apparatus. Softening and discontinuities in compressional (P) and shear (S) wave velocities have been observed at around 1.45 GPa due to the phase transition of CaCO3-I to CaCO3-II, and the coexistence of CaCO3-IIIb and CaCO3-III stay up to ∼5 GPa. Limestone under CaCO3-I and CaCO3-III phase has much lower velocities and higher V P/V S ratio than most crustal and mantle minerals and the PREM model. Phase transitions from CaCO3-I to CaCO3-II cause the abrupt reduction of V P, V S, and V P/V S. The low velocities and high/low V P/V S ratio are well consistent with the seismology observed in the mantle wedge. The result suggests that the subduction of limestone into Earth's interior would cause low-velocity anomalies in mantle wedges.","PeriodicalId":12864,"journal":{"name":"High Pressure Research","volume":"42 1","pages":"336 - 348"},"PeriodicalIF":2.0,"publicationDate":"2022-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47411495","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-03DOI: 10.1080/08957959.2022.2113874
B. Lavina, E. Zanardi, A. Mujica, H. Cynn, Y. Meng, J.S. Smith, M. Kong, Y. Lee
ABSTRACT Using a laser-heated diamond anvil cell, a powdered sample of gallium phosphide was compressed to 17.5 GPa and heated up to 1400 K. The material obtained was characterized at room temperature using synchrotron x-ray diffraction. Experimental results were compared with first-principles calculations. The polymorph observed assumes the simple cubic structure (sc16) initially reported for GaAs at high pressures. Microdiffraction mapping showed variable grain sizes of the synthesized phase, with the largest grains located in the middle of the heated spot. Structural refinements were performed on selected grains. The structure predicted based on first-principles calculations is in close agreement with the experiments. The two Ga–P bonds show similar lengths in sc16-GaP; however, the bond angles differ, resulting in a distorted tetrahedral coordination geometry.
{"title":"The structure of sc16 GaP obtained at 17.5 GPa and 1400 K","authors":"B. Lavina, E. Zanardi, A. Mujica, H. Cynn, Y. Meng, J.S. Smith, M. Kong, Y. Lee","doi":"10.1080/08957959.2022.2113874","DOIUrl":"https://doi.org/10.1080/08957959.2022.2113874","url":null,"abstract":"ABSTRACT Using a laser-heated diamond anvil cell, a powdered sample of gallium phosphide was compressed to 17.5 GPa and heated up to 1400 K. The material obtained was characterized at room temperature using synchrotron x-ray diffraction. Experimental results were compared with first-principles calculations. The polymorph observed assumes the simple cubic structure (sc16) initially reported for GaAs at high pressures. Microdiffraction mapping showed variable grain sizes of the synthesized phase, with the largest grains located in the middle of the heated spot. Structural refinements were performed on selected grains. The structure predicted based on first-principles calculations is in close agreement with the experiments. The two Ga–P bonds show similar lengths in sc16-GaP; however, the bond angles differ, resulting in a distorted tetrahedral coordination geometry.","PeriodicalId":12864,"journal":{"name":"High Pressure Research","volume":"42 1","pages":"294 - 302"},"PeriodicalIF":2.0,"publicationDate":"2022-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48935565","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-03DOI: 10.1080/08957959.2022.2102426
I. Podborodnikov, A. Shatskiy, A. Arefiev, A. Bekhtenova, K. Litasov
ABSTRACT Continuous variations in the composition of melt inclusions in diamonds from K-rich saline to carbonatitic indicate their possible genetic relationship. This causes interest in the study of chloride-carbonate systems at high pressure. Here we present experimental data on phase relations in the KCl–CaCO3 and KCl–MgCO3 systems at 6 GPa and 1000–1600 °C. The studied systems have the eutectic type of T-X diagrams. Subsolidus phases are represented by aragonite + KCl and magnesite + KCl. The KCl–CaCO3 eutectic is situated at 1200 °C and K2# 20, while the KCl–MgCO3 eutectic is located at 1400 °C and K2# 43, where K2# = 2KCl/(2KCl + CaCO3 + MgCO3)×100 mol%. The concentration of K and Cl in water-soluble chloride, and Ca, Mg, and CO2 in carbonate suggests that K-rich saline fluid entrapped by ‘fibrous’ diamonds could be a low-temperature derivative of a carbonatite melt containing KCl and H2O.
{"title":"The systems KCl–CaCO3 and KCl–MgCO3 at 6 GPa","authors":"I. Podborodnikov, A. Shatskiy, A. Arefiev, A. Bekhtenova, K. Litasov","doi":"10.1080/08957959.2022.2102426","DOIUrl":"https://doi.org/10.1080/08957959.2022.2102426","url":null,"abstract":"ABSTRACT\u0000 Continuous variations in the composition of melt inclusions in diamonds from K-rich saline to carbonatitic indicate their possible genetic relationship. This causes interest in the study of chloride-carbonate systems at high pressure. Here we present experimental data on phase relations in the KCl–CaCO3 and KCl–MgCO3 systems at 6 GPa and 1000–1600 °C. The studied systems have the eutectic type of T-X diagrams. Subsolidus phases are represented by aragonite + KCl and magnesite + KCl. The KCl–CaCO3 eutectic is situated at 1200 °C and K2# 20, while the KCl–MgCO3 eutectic is located at 1400 °C and K2# 43, where K2# = 2KCl/(2KCl + CaCO3 + MgCO3)×100 mol%. The concentration of K and Cl in water-soluble chloride, and Ca, Mg, and CO2 in carbonate suggests that K-rich saline fluid entrapped by ‘fibrous’ diamonds could be a low-temperature derivative of a carbonatite melt containing KCl and H2O.","PeriodicalId":12864,"journal":{"name":"High Pressure Research","volume":"42 1","pages":"245 - 258"},"PeriodicalIF":2.0,"publicationDate":"2022-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45282803","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-03DOI: 10.1080/08957959.2022.2109968
A. Forestier, G. Weck, F. Datchi, P. Loubeyre
ABSTRACT VIPA-based Brillouin spectroscopy is implemented for in-situ measurements at high pressure and temperature in laser-heated diamond anvil cells. Its performances are compared to those of the widely used Tandem Fabry–Perot instrument. A significant reduction of the collection time is in particular enabled. The usefulness of VIPA-Brillouin spectroscopy for High Pressure studies is here illustrated by revisiting the nitrogen melting curve up to 45 GPa. VIPA-Brillouin spectroscopy has the potential to become an important platform to investigate the equation of state properties of warm dense molecular systems.
{"title":"Performances of a VIPA-based spectrometer for Brillouin scattering experiments in the diamond anvil cell under laser heating","authors":"A. Forestier, G. Weck, F. Datchi, P. Loubeyre","doi":"10.1080/08957959.2022.2109968","DOIUrl":"https://doi.org/10.1080/08957959.2022.2109968","url":null,"abstract":"ABSTRACT VIPA-based Brillouin spectroscopy is implemented for in-situ measurements at high pressure and temperature in laser-heated diamond anvil cells. Its performances are compared to those of the widely used Tandem Fabry–Perot instrument. A significant reduction of the collection time is in particular enabled. The usefulness of VIPA-Brillouin spectroscopy for High Pressure studies is here illustrated by revisiting the nitrogen melting curve up to 45 GPa. VIPA-Brillouin spectroscopy has the potential to become an important platform to investigate the equation of state properties of warm dense molecular systems.","PeriodicalId":12864,"journal":{"name":"High Pressure Research","volume":"42 1","pages":"259 - 277"},"PeriodicalIF":2.0,"publicationDate":"2022-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42690101","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-03DOI: 10.1080/08957959.2022.2112677
M. Noda, T. Inoue, T. Tsuchiya, Y. Higo
ABSTRACT A new bond correction method for simultaneous elastic wave velocity measurement of in situ synchrotron X-ray technique and ultrasonic interferometry combined with a Kawai type multi-anvil apparatus is developed to measure elastic wave velocity precisely. The new method was validated using data from the literature and new elastic constant data of gold obtained under high pressure and high-temperature conditions. Elastic wave velocities corrected using the new method show lower values than those obtained without bond correction and using the conventional method, which show good agreement with datasets by in situ Brillouin scattering measurement and ab initio calculation. When the sample length is 1 mm under ambient conditions, the corrected V P and V S became 3.7% and 1.6% lower, respectively, than values obtained without bond correction under 12 GPa and 900 K. Results show that correcting the bond effect is extremely important, especially when the sample length is less than 1 mm.
{"title":"Reassessment of a bond correction method for in situ ultrasonic interferometry on elastic wave velocity measurement under high pressure and high temperature","authors":"M. Noda, T. Inoue, T. Tsuchiya, Y. Higo","doi":"10.1080/08957959.2022.2112677","DOIUrl":"https://doi.org/10.1080/08957959.2022.2112677","url":null,"abstract":"ABSTRACT\u0000 A new bond correction method for simultaneous elastic wave velocity measurement of in situ synchrotron X-ray technique and ultrasonic interferometry combined with a Kawai type multi-anvil apparatus is developed to measure elastic wave velocity precisely. The new method was validated using data from the literature and new elastic constant data of gold obtained under high pressure and high-temperature conditions. Elastic wave velocities corrected using the new method show lower values than those obtained without bond correction and using the conventional method, which show good agreement with datasets by in situ Brillouin scattering measurement and ab initio calculation. When the sample length is 1 mm under ambient conditions, the corrected V P and V S became 3.7% and 1.6% lower, respectively, than values obtained without bond correction under 12 GPa and 900 K. Results show that correcting the bond effect is extremely important, especially when the sample length is less than 1 mm.","PeriodicalId":12864,"journal":{"name":"High Pressure Research","volume":"42 1","pages":"278 - 293"},"PeriodicalIF":2.0,"publicationDate":"2022-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45525289","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-04-03DOI: 10.1080/08957959.2022.2068954
T. Hattori, S. Ohira-Kawamura, T. Kawasaki
ABSTRACT We have developed a hybrid piston cylinder cell for quasielastic neutron scattering (QENS) experiments up to about 1 GPa. It consists of a fretted cylinder made of the high tensile steel (SNCM439) liner and the Al alloy (NA700) jacket. Performance tests revealed that the cell can withstand a pressure of 0.8 GPa without irreversible damage and has 4.4 times larger neutron transmission at 3.14 meV (5.10 Å in wavelength) than that of a conventional CuBe monobloc cylinder. Combined with the sample assembly devised for suppressing multiple scattering, high quality QENS spectra of water were obtained up to 0.8 GPa. This study illustrates the efficacy of the hybrid cylinders not only for increasing maximum available pressure but also manipulating the available pressure and the signal intensity, depending on the purpose of the experiments.
{"title":"Development of a hybrid piston cylinder cell for quasielastic neutron scattering experiments up to 1 GPa","authors":"T. Hattori, S. Ohira-Kawamura, T. Kawasaki","doi":"10.1080/08957959.2022.2068954","DOIUrl":"https://doi.org/10.1080/08957959.2022.2068954","url":null,"abstract":"ABSTRACT\u0000 We have developed a hybrid piston cylinder cell for quasielastic neutron scattering (QENS) experiments up to about 1 GPa. It consists of a fretted cylinder made of the high tensile steel (SNCM439) liner and the Al alloy (NA700) jacket. Performance tests revealed that the cell can withstand a pressure of 0.8 GPa without irreversible damage and has 4.4 times larger neutron transmission at 3.14 meV (5.10 Å in wavelength) than that of a conventional CuBe monobloc cylinder. Combined with the sample assembly devised for suppressing multiple scattering, high quality QENS spectra of water were obtained up to 0.8 GPa. This study illustrates the efficacy of the hybrid cylinders not only for increasing maximum available pressure but also manipulating the available pressure and the signal intensity, depending on the purpose of the experiments.","PeriodicalId":12864,"journal":{"name":"High Pressure Research","volume":"42 1","pages":"226 - 235"},"PeriodicalIF":2.0,"publicationDate":"2022-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41946061","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-04-03DOI: 10.1080/08957959.2022.2079978
C. Aouadhi, Mayasar I. Al-zaban, Albandary Nasser Alsaloom, A. Maaroufi
ABSTRACT Bacillus sporothermoduras spores are known to be very resistant to ultra heat treatment. It is able to germinate and growth in the final product causing the non-sterility of UHT milk. Indeed, the currently used methods for the preservation of dairy products are often not sufficient for the destruction of all the spores potentially present. Faced with the constraint of altering the organoleptic and nutritional quality of milk by increasing the temperature and/or the duration of the treatment, in order to inactivate the highly heat-resistant spores, it has therefore become essential to develop other processes more effective in completely inactivating these spores without modifying the organoleptic characteristics of the product. The use of non-thermal methods offers an interesting alternative to conventional thermal treatments. They inactivate microorganisms, in particular bacterial spores, while preserving the organoleptic and nutritional qualities of the treated product. As a result, they have received special attention in recent years. Consequently, this review aimed to summarize the related investigation on the inactivation of heat-resistant spores of Bacillus sporothermodurans by non-thermal methods.
{"title":"Review: inactivation of very heat-resistant spores of Bacilus sporothermodurans by high pressure treatment combined with others treatments","authors":"C. Aouadhi, Mayasar I. Al-zaban, Albandary Nasser Alsaloom, A. Maaroufi","doi":"10.1080/08957959.2022.2079978","DOIUrl":"https://doi.org/10.1080/08957959.2022.2079978","url":null,"abstract":"ABSTRACT\u0000 Bacillus sporothermoduras spores are known to be very resistant to ultra heat treatment. It is able to germinate and growth in the final product causing the non-sterility of UHT milk. Indeed, the currently used methods for the preservation of dairy products are often not sufficient for the destruction of all the spores potentially present. Faced with the constraint of altering the organoleptic and nutritional quality of milk by increasing the temperature and/or the duration of the treatment, in order to inactivate the highly heat-resistant spores, it has therefore become essential to develop other processes more effective in completely inactivating these spores without modifying the organoleptic characteristics of the product. The use of non-thermal methods offers an interesting alternative to conventional thermal treatments. They inactivate microorganisms, in particular bacterial spores, while preserving the organoleptic and nutritional qualities of the treated product. As a result, they have received special attention in recent years. Consequently, this review aimed to summarize the related investigation on the inactivation of heat-resistant spores of Bacillus sporothermodurans by non-thermal methods.","PeriodicalId":12864,"journal":{"name":"High Pressure Research","volume":"42 1","pages":"236 - 244"},"PeriodicalIF":2.0,"publicationDate":"2022-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44530563","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-04-03DOI: 10.1080/08957959.2022.2089568
Yoshiaki Ito, O. Ikeda, T. Sakamaki, T. Kuribayashi, A. Suzuki
ABSTRACT In this study, an in situ X-ray diffraction study of α-ScOOH, scandium oxyhydroxide with a diaspore-type structure, was conducted at a pressure and temperature of up to 4.12 GPa and 700 K, respectively, to determine the pressure-volume-temperature (P-V-T) equation of state (EoS). Using a least-squares fit of the second-order Birch–Murnaghan EoS to the P-V-T data, the EoS parameters of α-ScOOH were determined as bulk modulus KT 0 = 101(1) GPa, (∂KT /∂T) P = −0.009(5) GPa K−1, and thermal expansion coefficient at zero pressure α = 3.12(6) 10−5 K−1. α-ScOOH exhibits anisotropic compression and thermal expansion behaviors, which are consistent with those of previous studies on diaspore-type oxyhydroxides. α-ScOOH is more compressible than other diaspore-type oxyhydroxides, and the product of the bulk modulus and volume is approximately constant among diaspore-type M3 + OOH (M = Al, Sc, and Fe).
{"title":"P-V-T equation of state of α-ScOOH.","authors":"Yoshiaki Ito, O. Ikeda, T. Sakamaki, T. Kuribayashi, A. Suzuki","doi":"10.1080/08957959.2022.2089568","DOIUrl":"https://doi.org/10.1080/08957959.2022.2089568","url":null,"abstract":"ABSTRACT\u0000 In this study, an in situ X-ray diffraction study of α-ScOOH, scandium oxyhydroxide with a diaspore-type structure, was conducted at a pressure and temperature of up to 4.12 GPa and 700 K, respectively, to determine the pressure-volume-temperature (P-V-T) equation of state (EoS). Using a least-squares fit of the second-order Birch–Murnaghan EoS to the P-V-T data, the EoS parameters of α-ScOOH were determined as bulk modulus KT 0 = 101(1) GPa, (∂KT /∂T) P = −0.009(5) GPa K−1, and thermal expansion coefficient at zero pressure α = 3.12(6) 10−5 K−1. α-ScOOH exhibits anisotropic compression and thermal expansion behaviors, which are consistent with those of previous studies on diaspore-type oxyhydroxides. α-ScOOH is more compressible than other diaspore-type oxyhydroxides, and the product of the bulk modulus and volume is approximately constant among diaspore-type M3 + OOH (M = Al, Sc, and Fe).","PeriodicalId":12864,"journal":{"name":"High Pressure Research","volume":"42 1","pages":"200 - 212"},"PeriodicalIF":2.0,"publicationDate":"2022-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44551327","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-04-03DOI: 10.1080/08957959.2022.2059366
Alexander C. Mark, J. Campuzano, R. Hemley
ABSTRACT Since the discovery of high temperature superconductivity in at an unprecedented of 35 K over 35 years ago, high pressure experiments have played a critical role in bdeveloping cuprate superconductivity. Soon after its discovery, compression experiments on revealed a large / , motivating the study of ‘chemical pressure’ in the material that led to the 90 K Superconductor . Cuprate superconductors discovered subsequently exhibited a range of from 30 K to 140 K, including the commonly studied Bi, Tl, and Hg based families. Pressure has large effects on superconductivity in these materials, including raising in the Hg based cuprates from 140 K to 166 K at 30 GPa. Reviewing past experiments indicate that pressure dopes holes into the planes common to all cuprates. Further detailed high pressure studies of these materials should deepen our understanding of cuprate superconductivity and the possibility of reaching still higher in cuprates.
{"title":"Progress and prospects for cuprate high temperature superconductors under pressure","authors":"Alexander C. Mark, J. Campuzano, R. Hemley","doi":"10.1080/08957959.2022.2059366","DOIUrl":"https://doi.org/10.1080/08957959.2022.2059366","url":null,"abstract":"ABSTRACT Since the discovery of high temperature superconductivity in at an unprecedented of 35 K over 35 years ago, high pressure experiments have played a critical role in bdeveloping cuprate superconductivity. Soon after its discovery, compression experiments on revealed a large / , motivating the study of ‘chemical pressure’ in the material that led to the 90 K Superconductor . Cuprate superconductors discovered subsequently exhibited a range of from 30 K to 140 K, including the commonly studied Bi, Tl, and Hg based families. Pressure has large effects on superconductivity in these materials, including raising in the Hg based cuprates from 140 K to 166 K at 30 GPa. Reviewing past experiments indicate that pressure dopes holes into the planes common to all cuprates. Further detailed high pressure studies of these materials should deepen our understanding of cuprate superconductivity and the possibility of reaching still higher in cuprates.","PeriodicalId":12864,"journal":{"name":"High Pressure Research","volume":"42 1","pages":"137 - 199"},"PeriodicalIF":2.0,"publicationDate":"2022-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46392646","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-02DOI: 10.1080/08957959.2022.2030325
Muhammad Sabeeh Akram, Shumail Sattar, Zhuo-Ning Fan, Qi-jun Liu, Fu-sheng Liu
ABSTRACT In this work, the equation-of-state data for liquid nitrogen shock compressed to 43 GPa along the principal Hugoniot and reflected-shock data up to 91 GPa were reported. A cryogenic target was used to liquefy the gas that was then further compressed by high-speed impactors. The first- and second-shock states were observed by a high-precision Doppler pin system (DPS). Optical wavefrom of DPS resulted in the first-shock velocity from which other derivative quantities i.e. particle-velocity, specific-volume, internal-energy, and Grüneisen-parameter, were determined. Our results and published equation-of-state data were used to extrapolate the principal Hugoniot. Their comparison showed softening above 27 GPa, attributed to the absorption of thermal energy that dissociates the molecular nitrogen. Our single-shock data provided a good match to available Hugoniot data. The reduced velocity profiles allowed us to detect optical reflectance of the dissociated liquid phase, and the apparent shock-velocity was used to determine the true shock-velocity in dissociation threshold.
{"title":"Measurement of shock and re-shock Hugoniot data of liquid nitrogen","authors":"Muhammad Sabeeh Akram, Shumail Sattar, Zhuo-Ning Fan, Qi-jun Liu, Fu-sheng Liu","doi":"10.1080/08957959.2022.2030325","DOIUrl":"https://doi.org/10.1080/08957959.2022.2030325","url":null,"abstract":"ABSTRACT In this work, the equation-of-state data for liquid nitrogen shock compressed to 43 GPa along the principal Hugoniot and reflected-shock data up to 91 GPa were reported. A cryogenic target was used to liquefy the gas that was then further compressed by high-speed impactors. The first- and second-shock states were observed by a high-precision Doppler pin system (DPS). Optical wavefrom of DPS resulted in the first-shock velocity from which other derivative quantities i.e. particle-velocity, specific-volume, internal-energy, and Grüneisen-parameter, were determined. Our results and published equation-of-state data were used to extrapolate the principal Hugoniot. Their comparison showed softening above 27 GPa, attributed to the absorption of thermal energy that dissociates the molecular nitrogen. Our single-shock data provided a good match to available Hugoniot data. The reduced velocity profiles allowed us to detect optical reflectance of the dissociated liquid phase, and the apparent shock-velocity was used to determine the true shock-velocity in dissociation threshold.","PeriodicalId":12864,"journal":{"name":"High Pressure Research","volume":"42 1","pages":"57 - 68"},"PeriodicalIF":2.0,"publicationDate":"2022-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45791866","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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