Pub Date : 2024-07-29DOI: 10.1103/physrevb.110.l041407
Yang Zhang, Claudia Felser, Liang Fu
The search for highly efficient and low-cost catalysts based on earth abundant elements is one of the main driving forces in organic and inorganic chemistry. In this work, we introduce the concept of moiré metal for hydrogen evolution reaction (HER). Using twisted as an example, we show that the spatially varying interlayer coupling leads to a corresponding variation of Gibbs free energy for hydrogen absorption at different sites on the moiré superlattice. Remarkably, as a HER catalyst, twisted is shown to cover the thermoneutral volcano peak, exceeding the efficiency of the current record platinum. The richness of local chemical environment in moiré structures provides a versatile method for designing superior catalysts.
寻找基于地球上丰富元素的高效低成本催化剂是有机和无机化学的主要驱动力之一。在这项研究中，我们提出了用于氢进化反应（HER）的摩尔金属概念。以扭曲的 NbS2 为例，我们发现层间耦合的空间变化会导致摩尔超晶格上不同位点吸氢的吉布斯自由能发生相应的变化。值得注意的是，作为 HER 催化剂，扭曲的 NbS2 可以覆盖热中性火山峰，其效率超过了目前创纪录的铂。摩尔结构中丰富的局部化学环境为设计卓越的催化剂提供了一种多功能方法。
{"title":"Moiré metal for catalysis","authors":"Yang Zhang, Claudia Felser, Liang Fu","doi":"10.1103/physrevb.110.l041407","DOIUrl":"https://doi.org/10.1103/physrevb.110.l041407","url":null,"abstract":"The search for highly efficient and low-cost catalysts based on earth abundant elements is one of the main driving forces in organic and inorganic chemistry. In this work, we introduce the concept of moiré metal for hydrogen evolution reaction (HER). Using twisted <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><msub><mi>NbS</mi><mn>2</mn></msub></math> as an example, we show that the spatially varying interlayer coupling leads to a corresponding variation of Gibbs free energy for hydrogen absorption at different sites on the moiré superlattice. Remarkably, as a HER catalyst, twisted <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><msub><mi>NbS</mi><mn>2</mn></msub></math> is shown to cover the thermoneutral volcano peak, exceeding the efficiency of the current record platinum. The richness of local chemical environment in moiré structures provides a versatile method for designing superior catalysts.","PeriodicalId":20082,"journal":{"name":"Physical Review B","volume":null,"pages":null},"PeriodicalIF":3.7,"publicationDate":"2024-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141791065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 : 2024-07-29DOI: 10.1103/physrevb.110.045443
Kitinan Pongsangangan, Pedro Cosme, Emanuele Di Salvo, Lars Fritz
One of the hallmark properties of fluids is their shear viscosity which is, among other things, responsible for parabolic flow profiles through narrow channels. In recent years, there has been a growing number of observations of said flow profiles in electronic transport measurements in a variety of material systems, most notably in graphene. In this paper, we investigate the shear viscosity of interacting graphene from a theoretical point of view. We study both a phenomenological as well as a microscopic model and find excellent agreement between the two. Our main finding is collective modes make a sizable contribution to the viscosity that can equal or even outweigh the electronic contribution that is usually assumed dominant. We comment on how this finding carries over to systems beyond graphene and related Dirac materials.
{"title":"Shear viscosity of interacting graphene","authors":"Kitinan Pongsangangan, Pedro Cosme, Emanuele Di Salvo, Lars Fritz","doi":"10.1103/physrevb.110.045443","DOIUrl":"https://doi.org/10.1103/physrevb.110.045443","url":null,"abstract":"One of the hallmark properties of fluids is their shear viscosity which is, among other things, responsible for parabolic flow profiles through narrow channels. In recent years, there has been a growing number of observations of said flow profiles in electronic transport measurements in a variety of material systems, most notably in graphene. In this paper, we investigate the shear viscosity of interacting graphene from a theoretical point of view. We study both a phenomenological as well as a microscopic model and find excellent agreement between the two. Our main finding is collective modes make a sizable contribution to the viscosity that can equal or even outweigh the electronic contribution that is usually assumed dominant. We comment on how this finding carries over to systems beyond graphene and related Dirac materials.","PeriodicalId":20082,"journal":{"name":"Physical Review B","volume":null,"pages":null},"PeriodicalIF":3.7,"publicationDate":"2024-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141791140","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 : 2024-07-29DOI: 10.1103/physrevb.110.019904
J. E. Hirsch, F. Marsiglio
DOI:https://doi.org/10.1103/PhysRevB.110.019904
DOI:https://doi.org/10.1103/PhysRevB.110.019904
{"title":"Erratum: Nonstandard superconductivity or no superconductivity in hydrides under high pressure [Phys. Rev. B 103, 134505 (2021)]","authors":"J. E. Hirsch, F. Marsiglio","doi":"10.1103/physrevb.110.019904","DOIUrl":"https://doi.org/10.1103/physrevb.110.019904","url":null,"abstract":"<span>DOI:</span><span>https://doi.org/10.1103/PhysRevB.110.019904</span>","PeriodicalId":20082,"journal":{"name":"Physical Review B","volume":null,"pages":null},"PeriodicalIF":3.7,"publicationDate":"2024-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141791050","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}
We discuss the computational efficiency of the finite-temperature simulation with minimally entangled typical thermal states (METTS). To argue that METTS can be efficiently represented as matrix product states, we present an analytic upper bound for the average entanglement Rényi entropy of METTS for a Rényi index . In particular, for one-dimensional (1D) gapless systems described by conformal field theories, the upper bound scales as where is the central charge and is the system size. Furthermore, we numerically find that the average Rényi entropy exhibits a universal behavior characterized by the central charge and is roughly given by half of the analytic upper bound. Based on these results, we show that METTS can provide a speedup compared to employing the purification method to analyze thermal equilibrium states at low temperatures in 1D gapless systems.
{"title":"Efficient simulation of low-temperature physics in one-dimensional gapless systems","authors":"Yuya Kusuki, Kotaro Tamaoka, Zixia Wei, Yasushi Yoneta","doi":"10.1103/physrevb.110.l041122","DOIUrl":"https://doi.org/10.1103/physrevb.110.l041122","url":null,"abstract":"We discuss the computational efficiency of the finite-temperature simulation with minimally entangled typical thermal states (METTS). To argue that METTS can be efficiently represented as matrix product states, we present an analytic upper bound for the average entanglement Rényi entropy of METTS for a Rényi index <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mn>0</mn><mo><</mo><mi>q</mi><mo>≤</mo><mn>1</mn></mrow></math>. In particular, for one-dimensional (1D) gapless systems described by conformal field theories, the upper bound scales as <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi>O</mi><mo>(</mo><mi>c</mi><msup><mi>N</mi><mn>0</mn></msup><mo form=\"prefix\">log</mo><mi>β</mi><mo>)</mo></mrow></math> where <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mi>c</mi></math> is the central charge and <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mi>N</mi></math> is the system size. Furthermore, we numerically find that the average Rényi entropy exhibits a universal behavior characterized by the central charge and is roughly given by half of the analytic upper bound. Based on these results, we show that METTS can provide a speedup compared to employing the purification method to analyze thermal equilibrium states at low temperatures in 1D gapless systems.","PeriodicalId":20082,"journal":{"name":"Physical Review B","volume":null,"pages":null},"PeriodicalIF":3.7,"publicationDate":"2024-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141794750","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 : 2024-07-29DOI: 10.1103/physrevb.110.024314
Itsuki Takagi, Yuma Konno, Yosuke Kayanuma, Kazutaka G. Nakamura
We present a novel and simple picture of the generation dynamics of coherent longitudinal optical (LO) phonons and LO-phonon-plasmon-coupled (LOPC) modes by the ultrafast infrared pump-pulses in gallium arsenide (GaAs) employing the low-temperature approximation. LO phonons exhibit a pronounced coupling with plasmons formed by the optically excited electrons in the excited states of GaAs. This coupling results in the coherent oscillation of the LOPC modes in the excited states. The pump pulse also induces stimulated Raman scattering, which generates the coherent LO-phonon oscillation in the ground state. This picture is incorporated into a simplified model, and the time evolution of the density operator is calculated using the Lindblad-type quantum master equation. The theoretical results explain well the reported experimental results on the coherent oscillation of LO phonons and LOPC modes observed through transient reflection measurements. Above all, our model provides a natural reason for the simultaneous manifestation of the LO phonons and the LOPC modes.
我们采用低温近似方法，对砷化镓（GaAs）中超快红外泵浦脉冲产生的相干纵向光学（LO）声子和LO-声子-质子耦合（LOPC）模式的生成动力学进行了新颖而简单的描述。LO声子与砷化镓激发态中光激发电子形成的质子有明显的耦合。这种耦合导致了激发态中 LOPC 模式的相干振荡。泵浦脉冲还会诱发受激拉曼散射，从而在基态产生相干的 LO-phonon 振荡。这种情况被纳入一个简化模型，并利用林德布拉德量子主方程计算了密度算子的时间演化。理论结果很好地解释了通过瞬态反射测量观察到的 LO 声子和 LOPC 模式相干振荡的实验结果。最重要的是，我们的模型为同时出现 LO 声子和 LOPC 模式提供了一个自然的理由。
{"title":"Dual role of longitudinal optical phonons for generation of coherent oscillations in gallium arsenide under optical pumping","authors":"Itsuki Takagi, Yuma Konno, Yosuke Kayanuma, Kazutaka G. Nakamura","doi":"10.1103/physrevb.110.024314","DOIUrl":"https://doi.org/10.1103/physrevb.110.024314","url":null,"abstract":"We present a novel and simple picture of the generation dynamics of coherent longitudinal optical (LO) phonons and LO-phonon-plasmon-coupled (LOPC) modes by the ultrafast infrared pump-pulses in gallium arsenide (GaAs) employing the low-temperature approximation. LO phonons exhibit a pronounced coupling with plasmons formed by the optically excited electrons in the excited states of GaAs. This coupling results in the coherent oscillation of the LOPC modes in the excited states. The pump pulse also induces stimulated Raman scattering, which generates the coherent LO-phonon oscillation in the ground state. This picture is incorporated into a simplified model, and the time evolution of the density operator is calculated using the Lindblad-type quantum master equation. The theoretical results explain well the reported experimental results on the coherent oscillation of LO phonons and LOPC modes observed through transient reflection measurements. Above all, our model provides a natural reason for the simultaneous manifestation of the LO phonons and the LOPC modes.","PeriodicalId":20082,"journal":{"name":"Physical Review B","volume":null,"pages":null},"PeriodicalIF":3.7,"publicationDate":"2024-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141791059","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 : 2024-07-29DOI: 10.1103/physrevb.110.035159
S. Nishihaya, Y. Watanabe, M. Kriener, A. Nakamura, M. Uchida
Emergent magnetic fields exerted by topological spin textures of magnets lead to an additional Hall response of itinerant carriers called the topological Hall effect (THE). While THE as a bulk effect has been widely studied, THE driven by magnetic domain boundaries (DBs) has been elusive. Here, we report rich Hall responses characterized by multiple peak structures and a hysteresis loop in films of , where Eu layers form a geometrically frustrated lattice of Heisenberg spins. We uncover a THE component sharply enhanced at magnetic transition fields, indicating a giant contribution from nontrivial spin textures possibly formed at the DBs.
磁体的拓扑自旋纹理产生的新兴磁场会导致巡回载流子产生额外的霍尔响应，这就是拓扑霍尔效应（THE）。拓扑霍尔效应作为一种体效应已被广泛研究，而由磁畴边界（DB）驱动的拓扑霍尔效应却一直难以捉摸。在这里，我们报告了 EuCd2 薄膜中以多峰值结构和滞后环为特征的丰富霍尔响应，其中 Eu 层形成了海森堡自旋的几何挫折晶格。我们发现了在磁过渡场中急剧增强的 THE 分量，这表明可能在 DBs 上形成的非偶数自旋纹理做出了巨大贡献。
{"title":"Topological Hall effect enhanced at magnetic transition fields in a frustrated magnet EuCd2","authors":"S. Nishihaya, Y. Watanabe, M. Kriener, A. Nakamura, M. Uchida","doi":"10.1103/physrevb.110.035159","DOIUrl":"https://doi.org/10.1103/physrevb.110.035159","url":null,"abstract":"Emergent magnetic fields exerted by topological spin textures of magnets lead to an additional Hall response of itinerant carriers called the topological Hall effect (THE). While THE as a bulk effect has been widely studied, THE driven by magnetic domain boundaries (DBs) has been elusive. Here, we report rich Hall responses characterized by multiple peak structures and a hysteresis loop in films of <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><msub><mi>EuCd</mi><mn>2</mn></msub></math>, where Eu layers form a geometrically frustrated lattice of Heisenberg spins. We uncover a THE component sharply enhanced at magnetic transition fields, indicating a giant contribution from nontrivial spin textures possibly formed at the DBs.","PeriodicalId":20082,"journal":{"name":"Physical Review B","volume":null,"pages":null},"PeriodicalIF":3.7,"publicationDate":"2024-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141791060","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}
Encircling non-Hermitian exceptional points (EPs) leads to the swapping of eigenstates, which naturally corresponds to the different state permutations. Here, we find that non-Abelian permutations meet the group in a four-state non-Hermitian system. By encircling three different exceptional arcs within a three-dimensional parameter space, we present seven eigenvalue permutations and correlate them with seven nontrivial operations in the non-Abelian group. Furthermore, our theory reveals the topological properties of higher-order EPs, improves the understanding of EPs in non-Hermitian systems, and offers a robust methodology for examining non-Abelian properties in systems with multiple EPs.
环绕非ermitian 特殊点（EPs）会导致特征状态的交换，这自然对应于不同的状态排列。在这里，我们发现非阿贝尔排列组合符合四态非ermitian 系统中的 D4 组。通过在三维参数空间中环绕三条不同的特殊弧线，我们提出了七种特征值排列，并将它们与非阿贝尔 D4 群中的七种非琐运算联系起来。此外，我们的理论揭示了高阶 EP 的拓扑特性，增进了对非ermitian 系统中 EP 的理解，并为研究具有多个 EP 的系统中的非阿贝尔特性提供了一种稳健的方法。
{"title":"Non-Abelian permutations meet D4 group in a four-state non-Hermitian system","authors":"Linsheng Bao, Aoqian Shi, Yuchen Peng, Peng Peng, Jiayun Ning, Zhennan Wang, Chao Peng, Jianjun Liu","doi":"10.1103/physrevb.110.l020104","DOIUrl":"https://doi.org/10.1103/physrevb.110.l020104","url":null,"abstract":"Encircling non-Hermitian exceptional points (EPs) leads to the swapping of eigenstates, which naturally corresponds to the different state permutations. Here, we find that non-Abelian permutations meet the <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><msub><mi>D</mi><mn>4</mn></msub></math> group in a four-state non-Hermitian system. By encircling three different exceptional arcs within a three-dimensional parameter space, we present seven eigenvalue permutations and correlate them with seven nontrivial operations in the non-Abelian <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><msub><mi>D</mi><mn>4</mn></msub></math> group. Furthermore, our theory reveals the topological properties of higher-order EPs, improves the understanding of EPs in non-Hermitian systems, and offers a robust methodology for examining non-Abelian properties in systems with multiple EPs.","PeriodicalId":20082,"journal":{"name":"Physical Review B","volume":null,"pages":null},"PeriodicalIF":3.7,"publicationDate":"2024-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141791061","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 : 2024-07-29DOI: 10.1103/physrevb.110.014519
Zhaochen Liu, Linghao Huang, Jing Wang
We investigate the Josephson diode effect (JDE) in topological Josephson junctions. By both analytic and numerical calculations, we find that while a Josephson junction in the topological phase may exhibit higher diode efficiency compared to that in the trivial phase, this behavior is not universal. The presence of Majorana bound states is not a sufficient condition for a large diode effect. Furthermore, the diode efficiency undergoes substantial changes only in specific regions along the topological phase transition boundary, and a significant diode effect does coincide with the topological phases. Thereby our paper suggests the utilization of topological superconductivity for enhanced JDE, and also the Josephson diode effect may serve as an indicator for topological superconductor phase. These results suggest a nuanced relationship between the topological aspects of Josephson junctions and Josephson diode effect.
{"title":"Josephson diode effect in topological superconductors","authors":"Zhaochen Liu, Linghao Huang, Jing Wang","doi":"10.1103/physrevb.110.014519","DOIUrl":"https://doi.org/10.1103/physrevb.110.014519","url":null,"abstract":"We investigate the Josephson diode effect (JDE) in topological Josephson junctions. By both analytic and numerical calculations, we find that while a Josephson junction in the topological phase may exhibit higher diode efficiency compared to that in the trivial phase, this behavior is not universal. The presence of Majorana bound states is not a sufficient condition for a large diode effect. Furthermore, the diode efficiency undergoes substantial changes only in <i>specific</i> regions along the topological phase transition boundary, and a significant diode effect does coincide with the topological phases. Thereby our paper suggests the utilization of topological superconductivity for enhanced JDE, and also the Josephson diode effect may serve as an indicator for topological superconductor phase. These results suggest a nuanced relationship between the topological aspects of Josephson junctions and Josephson diode effect.","PeriodicalId":20082,"journal":{"name":"Physical Review B","volume":null,"pages":null},"PeriodicalIF":3.7,"publicationDate":"2024-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141791049","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 : 2024-07-29DOI: 10.1103/physrevb.110.045149
Andrea Ferretti, Tommaso Chiarotti, Nicola Marzari
In Green's function theory, the total energy of an interacting many-electron system can be expressed in a variational form using the Klein or Luttinger-Ward functionals. Green's function theory also naturally addresses the case where the interacting system is embedded into a bath. The latter can then act as a dynamical (i.e., frequency-dependent) potential, providing a more general framework than that of conventional static external potentials. Notably, the Klein functional includes a term of the form , where is the integration in frequency of the trace operator. Here, we show that using a sum-over-poles representation for the Green's functions and the algorithmic-inversion method one can obtain, in full generality, an explicit analytical expression for . Further, this allows us (1) to recover an explicit expression for the random phase approximation correlation energy in the framework of the optimized effective potential and (2) to derive a variational expression for the Klein functional valid in the presence of an embedding bath.
{"title":"Green's function embedding using sum-over-pole representations","authors":"Andrea Ferretti, Tommaso Chiarotti, Nicola Marzari","doi":"10.1103/physrevb.110.045149","DOIUrl":"https://doi.org/10.1103/physrevb.110.045149","url":null,"abstract":"In Green's function theory, the total energy of an interacting many-electron system can be expressed in a variational form using the Klein or Luttinger-Ward functionals. Green's function theory also naturally addresses the case where the interacting system is embedded into a bath. The latter can then act as a dynamical (i.e., frequency-dependent) potential, providing a more general framework than that of conventional static external potentials. Notably, the Klein functional includes a term of the form <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><msub><mtext>Tr</mtext><mi>ω</mi></msub><mtext>ln</mtext><mrow><mo>{</mo><msubsup><mi>G</mi><mn>0</mn><mrow><mo>−</mo><mn>1</mn></mrow></msubsup><mi>G</mi><mo>}</mo></mrow></mrow></math>, where <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><msub><mtext>Tr</mtext><mi>ω</mi></msub></math> is the integration in frequency of the trace operator. Here, we show that using a sum-over-poles representation for the Green's functions and the algorithmic-inversion method one can obtain, in full generality, an explicit analytical expression for <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><msub><mtext>Tr</mtext><mi>ω</mi></msub><mtext>ln</mtext><mrow><mo>{</mo><msubsup><mi>G</mi><mn>0</mn><mrow><mo>−</mo><mn>1</mn></mrow></msubsup><mi>G</mi><mo>}</mo></mrow></mrow></math>. Further, this allows us (1) to recover an explicit expression for the random phase approximation correlation energy in the framework of the optimized effective potential and (2) to derive a variational expression for the Klein functional valid in the presence of an embedding bath.","PeriodicalId":20082,"journal":{"name":"Physical Review B","volume":null,"pages":null},"PeriodicalIF":3.7,"publicationDate":"2024-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141794749","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 : 2024-07-29DOI: 10.1103/physrevb.110.l020504
Manuel Houzet, Julia S. Meyer, Yuli V. Nazarov
A Josephson junction may be in a stable odd-parity state when a single quasiparticle is trapped in an Andreev bound state. Embedding such junction in an electromagnetic environment gives rise to a special quantum mechanics of the superconducting phase that we investigate theoretically. Our analysis covers several representative cases, from the lifting of the supercurrent quench due to quasiparticle poisoning for a low ohmic impedance of the environment, to a Schmid transition in a current-biased junction that for odd parity occurs at four times bigger critical impedance. For intermediate impedances, the supercurrent in the odd state is higher than in the even one.
{"title":"Josephson quantum mechanics at odd parity","authors":"Manuel Houzet, Julia S. Meyer, Yuli V. Nazarov","doi":"10.1103/physrevb.110.l020504","DOIUrl":"https://doi.org/10.1103/physrevb.110.l020504","url":null,"abstract":"A Josephson junction may be in a stable odd-parity state when a single quasiparticle is trapped in an Andreev bound state. Embedding such junction in an electromagnetic environment gives rise to a special quantum mechanics of the superconducting phase that we investigate theoretically. Our analysis covers several representative cases, from the lifting of the supercurrent quench due to quasiparticle poisoning for a low ohmic impedance of the environment, to a Schmid transition in a current-biased junction that for odd parity occurs at four times bigger critical impedance. For intermediate impedances, the supercurrent in the odd state is higher than in the even one.","PeriodicalId":20082,"journal":{"name":"Physical Review B","volume":null,"pages":null},"PeriodicalIF":3.7,"publicationDate":"2024-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141791062","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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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