Solitary excitations due to the combination of an electronic excitation with intramolecular (both totally symmetric and nontotally symmetric) vibrations are shown to take place in molecular chains. Two cases are considered: a) when the molecules of the chain are fixed at their equilibrium positions and b) when the chain molecules are oscillating. In the second case solitary bound states of the chain deformation and the exciton-intramolecular excitation can exist and propagate along the chain. The parameters of the solitons and the energy of the system are calculated. Es wird gezeigt, das in Molekulketten solitare Anregungen, verursacht durch die Wechselwirkung der Elektronenanregungen mit intramolekularen (sowohl totalsymmetrischen als auch nicht total symmetrischen) Schwingungen, existieren. Zwei Falle werden untersucht: a) wenn die Kettenmolekule an ihren Gleichgewichtsstellen fixiert sind und b) wenn die Kettenmolekule oszillieren. Im zweiten Fall konnen solitare gebundene Zustande der Kettendeformation und der Exziton-Intramolekulanregung existieren und sich entlang der Kette fortpflanzen. Die Parameter der Solitonen und die Energie des Systems werden berechnet.
{"title":"Solitary Excitations in Molecular Chains in the Presence of Vibronic States","authors":"Kh. I. Pushkaeov, M. T. Peimatabova","doi":"10.1002/PSSB.2221330130","DOIUrl":"https://doi.org/10.1002/PSSB.2221330130","url":null,"abstract":"Solitary excitations due to the combination of an electronic excitation with intramolecular (both totally symmetric and nontotally symmetric) vibrations are shown to take place in molecular chains. Two cases are considered: a) when the molecules of the chain are fixed at their equilibrium positions and b) when the chain molecules are oscillating. In the second case solitary bound states of the chain deformation and the exciton-intramolecular excitation can exist and propagate along the chain. The parameters of the solitons and the energy of the system are calculated. \u0000 \u0000 \u0000 \u0000Es wird gezeigt, das in Molekulketten solitare Anregungen, verursacht durch die Wechselwirkung der Elektronenanregungen mit intramolekularen (sowohl totalsymmetrischen als auch nicht total symmetrischen) Schwingungen, existieren. Zwei Falle werden untersucht: a) wenn die Kettenmolekule an ihren Gleichgewichtsstellen fixiert sind und b) wenn die Kettenmolekule oszillieren. Im zweiten Fall konnen solitare gebundene Zustande der Kettendeformation und der Exziton-Intramolekulanregung existieren und sich entlang der Kette fortpflanzen. Die Parameter der Solitonen und die Energie des Systems werden berechnet.","PeriodicalId":11087,"journal":{"name":"Day 1 Tue, January 11, 2022","volume":"12 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1986-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74321939","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Lavin's modifications of Phillips and Van Vechten (PVV) theory are discussed and hence ionic gap (Ec), homopolar gap (Eh), and ionicity (fi) are investigated for iron chalcogenides (FeS, FeS2, FeSe2, and FeTe2). A correlation between evaluated values of ionicity and Mossbauer isomeric shift is also discussed.
{"title":"Electronic Properties of Iron Chalcogenides FeS, FeS2, FeSe2, and FeTe2","authors":"O. Singh, V. P. Gupta","doi":"10.1002/PSSB.2221330129","DOIUrl":"https://doi.org/10.1002/PSSB.2221330129","url":null,"abstract":"Lavin's modifications of Phillips and Van Vechten (PVV) theory are discussed and hence ionic gap (Ec), homopolar gap (Eh), and ionicity (fi) are investigated for iron chalcogenides (FeS, FeS2, FeSe2, and FeTe2). A correlation between evaluated values of ionicity and Mossbauer isomeric shift is also discussed.","PeriodicalId":11087,"journal":{"name":"Day 1 Tue, January 11, 2022","volume":"198 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1986-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75118306","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1986-12-31DOI: 10.1515/9783112495483-013
M. Brand, A. Lodder
{"title":"Electromigration in Niobium","authors":"M. Brand, A. Lodder","doi":"10.1515/9783112495483-013","DOIUrl":"https://doi.org/10.1515/9783112495483-013","url":null,"abstract":"","PeriodicalId":11087,"journal":{"name":"Day 1 Tue, January 11, 2022","volume":"8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1986-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78077029","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1986-12-31DOI: 10.1515/9783112495483-055
A. R. Jani, H. K. Patel
{"title":"Quantum Number Dependent Model Fseudopotential for Metallic Properties","authors":"A. R. Jani, H. K. Patel","doi":"10.1515/9783112495483-055","DOIUrl":"https://doi.org/10.1515/9783112495483-055","url":null,"abstract":"","PeriodicalId":11087,"journal":{"name":"Day 1 Tue, January 11, 2022","volume":"31 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1986-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82131584","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1986-12-31DOI: 10.1515/9783112495483-064
K. I. Andronik, V. F. Banar, V. Kantser, A. Sidorenko
{"title":"Kondo-Type Behaviour of Conductivity in Tl-Doped PbTe Single Crystals","authors":"K. I. Andronik, V. F. Banar, V. Kantser, A. Sidorenko","doi":"10.1515/9783112495483-064","DOIUrl":"https://doi.org/10.1515/9783112495483-064","url":null,"abstract":"","PeriodicalId":11087,"journal":{"name":"Day 1 Tue, January 11, 2022","volume":"2 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1986-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78793474","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1986-12-31DOI: 10.1515/9783112495483-027
Wu Xiaoguang, F. Peeters, J. Devreese
{"title":"Screening of the Electron-Phonon Interaction in GaAs Heterostructures","authors":"Wu Xiaoguang, F. Peeters, J. Devreese","doi":"10.1515/9783112495483-027","DOIUrl":"https://doi.org/10.1515/9783112495483-027","url":null,"abstract":"","PeriodicalId":11087,"journal":{"name":"Day 1 Tue, January 11, 2022","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1986-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80088072","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
It is shown that in a medium representing an example of “Koch's tree”-type fractional structure the diffusion process is described by a generalized transfer equation in partial derivations. Such a structure can serve as a model of a porous medium where the diffusion process takes place. The geometry of an inhomogeneous medium can serve as the dicisive factor in the explanation of the “universal response” phenomenon. A range of frequencies is found where such “superslow” diffusion process can be observed. [Russian Text Ignored].
{"title":"The Realization of the Generalized Transfer Equation in a Medium with Fractal Geometry","authors":"R. Nigmatullin","doi":"10.1002/PSSB.2221330150","DOIUrl":"https://doi.org/10.1002/PSSB.2221330150","url":null,"abstract":"It is shown that in a medium representing an example of “Koch's tree”-type fractional structure the diffusion process is described by a generalized transfer equation in partial derivations. Such a structure can serve as a model of a porous medium where the diffusion process takes place. The geometry of an inhomogeneous medium can serve as the dicisive factor in the explanation of the “universal response” phenomenon. A range of frequencies is found where such “superslow” diffusion process can be observed. \u0000 \u0000 \u0000 \u0000[Russian Text Ignored].","PeriodicalId":11087,"journal":{"name":"Day 1 Tue, January 11, 2022","volume":"16 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1986-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77090034","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1986-12-31DOI: 10.1515/9783112495483-012
A. I. Melkek, S. Romanov, N. L. Taeasenko
{"title":"Defect Clusters and Subcascades","authors":"A. I. Melkek, S. Romanov, N. L. Taeasenko","doi":"10.1515/9783112495483-012","DOIUrl":"https://doi.org/10.1515/9783112495483-012","url":null,"abstract":"","PeriodicalId":11087,"journal":{"name":"Day 1 Tue, January 11, 2022","volume":"28 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1986-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73947770","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
An investigation is made of resonant excitation of helicon waves at the difference frequency of two microwave beams propagating in a magneto-active solid state plasma viz. n-InSb. The two beams propagating obliquely with the magnetostatic field interact in the semiconductor to give rise to a nonlinear ponderomotive force at the difference frequency which resonantly excites helicon waves if the dispersion relation corresponding to helicon waves is satisfied. The results show that microwave beams of power densities 1 MW cm−2 can excite helicon waves of power density 0.98 kW cm−2 when ωc/ω = 25. The power carried by helicon waves depends on the direction of propagation of the pumps relative to magnetostatic field. For the parameters under consideration the power gets optimised at an angle θ = 63.4°. Helicon waves are not excited if the pumps propagate parallel or perpendicular to the magnetic field. The increase in magnetic field increases the power density of the excited helicon wave. Es wird die Resonanzanregung von Helikonwellen bei der Differenzfrequenz zweier Mikrowellen-strahlen, die sich in einem magnetoaktiven Festkorperplasma, z.B. n-InSb, ausbreiten, untersucht. Die beiden Strahlen breiten sich schrag zum magnetostatischen Feld aus, das im Halbleiter wirkt, und ihre Wechselwirkung gibt Anlas zu einer nichtlinearen ponderomotorischen Kraft bei der Differenzfrequenz, die eine Resonanzanregung von Helikonwellen ergibt, wenn die den Helikonwellen entsprechende Dispersionsbeziehung erfullt ist. Die Ergebnisse zeigen, das Mikrowellen-strahlen mit einer Leistungsdichte von 1 MW cm−2 Helikonwellen mit einer Leistungsdichte von 0.98 kW cm−2 anregen konnen, wenn ωc/ω = 25 ist. Die von den Helikonwellen getragene Leistung hangt von der Ausbreitungsrichtung der Pumpwellen relativ zum statischen Magnetfeld ab. Fur die untersuchten Parameter wird die Leistung bei einem Winkel θ = 63.4° optimal. Helikonwellen werden nicht angeregt, wenn die Pumpwellen sich parallel oder senkrecht zum Magnetfeld ausbreiten. Die Erhohng des Magnetfeldes steigert die Leistungsdichte der angeregten Helikonwelle.
研究了两束微波在磁活性固态等离子体(n-InSb)中以差频传播的螺旋波的共振激发。在半导体中，随静磁场斜向传播的两束光相互作用，在差频处产生非线性质动力，当满足与螺旋波对应的色散关系时，产生共振激振螺旋波。结果表明，当ωc/ω = 25时，功率密度为1 MW cm−2的微波束能激发出功率密度为0.98 kW cm−2的螺旋波。螺旋波携带的功率取决于泵相对于静磁场的传播方向。对于所考虑的参数，功率在角θ = 63.4°处得到优化。如果泵浦与磁场平行或垂直传播，则不会激发螺旋波。磁场的增大使激发螺旋波的功率密度增大。[4] [j] .不同频率磁致共振等离子体的磁致共振特性研究，[j] .浙江大学学报(自然科学版)。其中，Strahlen为schrag zum magnetostatischen Feld, Halbleiter为schrag zum magnetostatischen Feld, Halbleiter为schbliter wirt, wehselwiron为scholenendeldermotorisen为scholenendermotorisen为差频，Helikonwellen为Resonanzanregung, Helikonwellen为sprechende Dispersionsbeziehung fulfulist。Die Ergebnisse zeigen, das Mikrowellen-strahlen mit einer Leistungsdichte von 1 MW cm−2,Helikonwellen mit einer Leistungsdichte von 0.98 kW cm−2，当ωc/ω = 25 ist时。参数风模Leistung beeinem Winkel θ = 63.4°最优。Helikonwellen werden night angegen, wendie Pumpwellen, parallel oder senkrecht zum magnetic field ausbreiten。Die erhonghong des magnenetfeldes steigert Die leistungsdichder angeregten helikonwell。
{"title":"Resonant Excitation of Helicon Waves by Two Microwave Beams in a Solid State Plasma","authors":"K. P. Maheshwari, G. Tarey","doi":"10.1002/PSSB.2221330149","DOIUrl":"https://doi.org/10.1002/PSSB.2221330149","url":null,"abstract":"An investigation is made of resonant excitation of helicon waves at the difference frequency of two microwave beams propagating in a magneto-active solid state plasma viz. n-InSb. The two beams propagating obliquely with the magnetostatic field interact in the semiconductor to give rise to a nonlinear ponderomotive force at the difference frequency which resonantly excites helicon waves if the dispersion relation corresponding to helicon waves is satisfied. The results show that microwave beams of power densities 1 MW cm−2 can excite helicon waves of power density 0.98 kW cm−2 when ωc/ω = 25. The power carried by helicon waves depends on the direction of propagation of the pumps relative to magnetostatic field. For the parameters under consideration the power gets optimised at an angle θ = 63.4°. Helicon waves are not excited if the pumps propagate parallel or perpendicular to the magnetic field. The increase in magnetic field increases the power density of the excited helicon wave. \u0000 \u0000 \u0000 \u0000Es wird die Resonanzanregung von Helikonwellen bei der Differenzfrequenz zweier Mikrowellen-strahlen, die sich in einem magnetoaktiven Festkorperplasma, z.B. n-InSb, ausbreiten, untersucht. Die beiden Strahlen breiten sich schrag zum magnetostatischen Feld aus, das im Halbleiter wirkt, und ihre Wechselwirkung gibt Anlas zu einer nichtlinearen ponderomotorischen Kraft bei der Differenzfrequenz, die eine Resonanzanregung von Helikonwellen ergibt, wenn die den Helikonwellen entsprechende Dispersionsbeziehung erfullt ist. Die Ergebnisse zeigen, das Mikrowellen-strahlen mit einer Leistungsdichte von 1 MW cm−2 Helikonwellen mit einer Leistungsdichte von 0.98 kW cm−2 anregen konnen, wenn ωc/ω = 25 ist. Die von den Helikonwellen getragene Leistung hangt von der Ausbreitungsrichtung der Pumpwellen relativ zum statischen Magnetfeld ab. Fur die untersuchten Parameter wird die Leistung bei einem Winkel θ = 63.4° optimal. Helikonwellen werden nicht angeregt, wenn die Pumpwellen sich parallel oder senkrecht zum Magnetfeld ausbreiten. Die Erhohng des Magnetfeldes steigert die Leistungsdichte der angeregten Helikonwelle.","PeriodicalId":11087,"journal":{"name":"Day 1 Tue, January 11, 2022","volume":"61 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1986-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88338689","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1986-12-31DOI: 10.1515/9783112495483-038
T. T. Bao
{"title":"Static Polarizability and Bipolar Surface Plasmon oi Small Metal Particles","authors":"T. T. Bao","doi":"10.1515/9783112495483-038","DOIUrl":"https://doi.org/10.1515/9783112495483-038","url":null,"abstract":"","PeriodicalId":11087,"journal":{"name":"Day 1 Tue, January 11, 2022","volume":"48 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1986-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82236264","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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