发布求助
文献互助 智能选刊 最新文献

arXiv: Superconductivity最新文献

筛选
英文 中文
Magnetic control of superconducting heterostructures using compensated antiferromagnets 利用补偿反铁磁体对超导异质结构进行磁控制
arXiv: Superconductivity Pub Date : 2020-10-05 DOI: 10.1103/PHYSREVB.103.L060505
Lina G. Johnsen, Sol H. Jacobsen, J. Linder
{"title":"Magnetic control of superconducting heterostructures using compensated antiferromagnets","authors":"Lina G. Johnsen, Sol H. Jacobsen, J. Linder","doi":"10.1103/PHYSREVB.103.L060505","DOIUrl":"https://doi.org/10.1103/PHYSREVB.103.L060505","url":null,"abstract":"Due to the lack of a net magnetization both at the interface and in the bulk, antiferromagnets with compensated interfaces may appear incapable of influencing the phase transition in an adjacent superconductor via the spin degree of freedom. We here demonstrate that such an assertion is incorrect by showing that proximity-coupling a compensated antiferromagnetic layer to a superconductor-ferromagnet heterostructure introduces the possibility of controlling the superconducting phase transition. The superconducting critical temperature can in fact be modulated by rotating the magnetization of the single ferromagnetic layer within the plane of the interface, although the system is invariant under rotations of the magnetization in the absence of the antiferromagnetic layer. Moreover, we predict that the superconducting phase transition can trigger a reorientation of the ground state magnetization.","PeriodicalId":8514,"journal":{"name":"arXiv: Superconductivity","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88985988","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}
引用次数: 11
Topological magnetic order and superconductivity in EuRbFe4As4 eubfe4as4的拓扑磁序和超导性
arXiv: Superconductivity Pub Date : 2020-10-05 DOI: 10.1103/PhysRevB.103.195112
M. Hemmida, N. Winterhalter-Stocker, D. Ehlers, H.-A. Krug von Nidda, M. Yao, J. Bannies, E. Rienks, R. Kurleto, C. Felser, B. Büchner, J. Fink, S. Gorol, T. Förster, S. Arsenijevic, V. Fritsch, P. Gegenwart
{"title":"Topological magnetic order and superconductivity in \u0000EuRbFe4As4","authors":"M. Hemmida, N. Winterhalter-Stocker, D. Ehlers, H.-A. Krug von Nidda, M. Yao, J. Bannies, E. Rienks, R. Kurleto, C. Felser, B. Büchner, J. Fink, S. Gorol, T. Förster, S. Arsenijevic, V. Fritsch, P. Gegenwart","doi":"10.1103/PhysRevB.103.195112","DOIUrl":"https://doi.org/10.1103/PhysRevB.103.195112","url":null,"abstract":"We study single crystals of the magnetic superconductor EuRbFe$_4$As$_4$ by magnetization, electron spin resonance (ESR), angle-resolved photoemission spectroscopy (ARPES) and electrical resistance in pulsed magnetic fields up to 630 kOe. The superconducting state below 36.5 K is almost isotropic and only weakly affected by the development of Eu$^{2+}$ magnetic order at 15 K. On the other hand, for the external magnetic field applied along the c-axis the temperature dependence of the ESR linewidth reveals a Berezinskii-Kosterlitz-Thouless topological transition below 15 K. This indicates that Eu$^{2+}$-planes are a good realization of a two-dimensional XY-magnet, which reflects the decoupling of the Eu$^{2+}$ magnetic moments from superconducting FeAs-layers.","PeriodicalId":8514,"journal":{"name":"arXiv: Superconductivity","volume":"2 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85123184","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}
引用次数: 3
Optical manipulation of domains in chiral topological superconductors 手性拓扑超导体中畴的光学操纵
arXiv: Superconductivity Pub Date : 2020-10-02 DOI: 10.1103/PHYSREVRESEARCH.3.013253
T. Yu, M. Claassen, D. Kennes, Michael A Sentef
{"title":"Optical manipulation of domains in chiral topological superconductors","authors":"T. Yu, M. Claassen, D. Kennes, Michael A Sentef","doi":"10.1103/PHYSREVRESEARCH.3.013253","DOIUrl":"https://doi.org/10.1103/PHYSREVRESEARCH.3.013253","url":null,"abstract":"Optical control of chirality in chiral superconductors bears potential for future topological quantum computing applications. When a chiral domain is written and erased by a laser spot, the Majorana modes around the domain can be manipulated on ultrafast time scales. Here we study topological superconductors with two chiral order parameters coupled via light fields by a time-dependent real-space Ginzburg-Landau approach. Continuous optical driving, or the application of supercurrent, hybridizes the two chiral order parameters, allowing one to induce and control the superconducting state beyond what is possible in equilibrium. We show that superconductivity can even be enhanced if the mutual coupling between two order parameters is sufficiently strong. Furthermore, we demonstrate that short optical pulses with spot size larger than a critical one can overcome a counteracting diffusion effect and write, erase, or move chiral domains. Surprisingly, these domains are found to be stable, which might enable optically programmable quantum computers in the future.","PeriodicalId":8514,"journal":{"name":"arXiv: Superconductivity","volume":"117 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74951250","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}
引用次数: 6
Controlling Tc of iridium films using the proximity effect 利用接近效应控制铱薄膜的Tc
arXiv: Superconductivity Pub Date : 2020-10-02 DOI: 10.1063/5.0018564
R. Hennings-Yeomans, C. L. Chang, J. Ding, A. Drobizhev, B. Fujikawa, S. Han, G. Karapetrov, Y. Kolomensky, V. Novosad, T. O’Donnell, J. Ouellet, J. Pearson, T. Polakovic, D. Reggio, B. Schmidt, B. Sheff, V. Singh, R. Smith, G. Wang, B. Welliver, V. Yefremenko, J. Zhang
{"title":"Controlling Tc of iridium films using the proximity effect","authors":"R. Hennings-Yeomans, C. L. Chang, J. Ding, A. Drobizhev, B. Fujikawa, S. Han, G. Karapetrov, Y. Kolomensky, V. Novosad, T. O’Donnell, J. Ouellet, J. Pearson, T. Polakovic, D. Reggio, B. Schmidt, B. Sheff, V. Singh, R. Smith, G. Wang, B. Welliver, V. Yefremenko, J. Zhang","doi":"10.1063/5.0018564","DOIUrl":"https://doi.org/10.1063/5.0018564","url":null,"abstract":"A superconducting Transition-Edge Sensor (TES) with low-$T_c$ is essential in a high resolution calorimetric detection. With a motivation of developing sensitive calorimeters for applications in cryogenic neutrinoless double beta decay searches, we have been investigating methods to reduce the $T_c$ of an Ir film down to 20 mK. Utilizing the proximity effect between a superconductor and a normal metal, we found two room temperature fabrication recipes of making Ir-based low-$T_c$ films. In the first approach, an Ir film sandwiched between two Au films, a Au/Ir/Au trilayer, has a tunable $T_c$ in the range of 20-100 mK depending on the relative thicknesses. In the second approach, a paramagnetic Pt thin film is used to create Ir/Pt bilayer with a tunable $T_c$ in the same range. We present detailed study of fabrication and characterization of Ir-based low-$T_c$ films, and compare the experimental results to theoretical models. We show that Ir-based films with predictable and reproducible critical temperature can be consistently fabricated for use in large scale detector applications.","PeriodicalId":8514,"journal":{"name":"arXiv: Superconductivity","volume":"15 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83756372","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}
引用次数: 10
In situ tunable nonlinearity and competing signal paths in coupled superconducting resonators 耦合超导谐振器中的原位可调谐非线性和竞争信号路径
arXiv: Superconductivity Pub Date : 2020-09-28 DOI: 10.1103/PHYSREVB.103.094515
Michael Fischer, Qiming Chen, C. Besson, P. Eder, J. Goetz, S. Pogorzalek, M. Renger, E. Xie, M. Hartmann, K. Fedorov, A. Marx, F. Deppe, R. Gross
{"title":"In situ\u0000 tunable nonlinearity and competing signal paths in coupled superconducting resonators","authors":"Michael Fischer, Qiming Chen, C. Besson, P. Eder, J. Goetz, S. Pogorzalek, M. Renger, E. Xie, M. Hartmann, K. Fedorov, A. Marx, F. Deppe, R. Gross","doi":"10.1103/PHYSREVB.103.094515","DOIUrl":"https://doi.org/10.1103/PHYSREVB.103.094515","url":null,"abstract":"We have fabricated and studied a system of two tunable and coupled nonlinear superconducting resonators. The nonlinearity is introduced by galvanically coupled dc-SQUIDs. We simulate the system response by means of a circuit model, which includes an additional signal path introduced by the electromagnetic environment. Furthermore, we present two methods allowing us to experimentally determine the nonlinearity. First, we fit the measured frequency and flux dependence of the transmission data to simulations based on the equivalent circuit model. Second, we fit the power dependence of the transmission data to a model that is predicted by the nonlinear equation of motion describing the system. Our results show that we are able to tune the nonlinearity of the resonators by almost two orders of magnitude via an external coil and two on-chip antennas. The studied system represents the basic building block for larger systems, allowing for quantum simulations of bosonic many-body systems with a larger number of lattice sites.","PeriodicalId":8514,"journal":{"name":"arXiv: Superconductivity","volume":"37 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75187463","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}
引用次数: 6
Impurity-induced double transitions for accidentally degenerate unconventional pairing states 意外简并非常规配对态的杂质诱导双跃迁
arXiv: Superconductivity Pub Date : 2020-09-21 DOI: 10.1103/PHYSREVRESEARCH.3.L012004
Bastian Zinkl, M. Sigrist
{"title":"Impurity-induced double transitions for accidentally degenerate unconventional pairing states","authors":"Bastian Zinkl, M. Sigrist","doi":"10.1103/PHYSREVRESEARCH.3.L012004","DOIUrl":"https://doi.org/10.1103/PHYSREVRESEARCH.3.L012004","url":null,"abstract":"Non-magnetic impurities can lift the accidental degeneracy of unconventional pairing states, such as the $(d + i g)$-wave state recently proposed for Sr$_2$RuO$_4$. This type of effect would lead to a superconducting double transition upon impurity doping. In a model calculation it is shown how this behavior depends on material parameters and how it could be detected.","PeriodicalId":8514,"journal":{"name":"arXiv: Superconductivity","volume":"134 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72841117","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}
引用次数: 7
Multichannel superconductivity of monolayer FeSe on SrTiO3: Interplay of spin fluctuations and electron-phonon interaction SrTiO3上单层FeSe的多通道超导性:自旋涨落和电子-声子相互作用的相互作用
arXiv: Superconductivity Pub Date : 2020-09-18 DOI: 10.1103/physrevb.102.180501
Fabian Schrodi, A. Aperis, P. Oppeneer
{"title":"Multichannel superconductivity of monolayer FeSe on \u0000SrTiO3\u0000: Interplay of spin fluctuations and electron-phonon interaction","authors":"Fabian Schrodi, A. Aperis, P. Oppeneer","doi":"10.1103/physrevb.102.180501","DOIUrl":"https://doi.org/10.1103/physrevb.102.180501","url":null,"abstract":"We investigate the effects of electron-phonon coupling, as well as of spin and charge fluctuations on the superconducting state in a single layer of FeSe on SrTiO$_3$ substrate. These three bosonic mediators of Cooper pairing are treated on equal footing in a multichannel, full-bandwidth, multiband, and anisotropic Eliashberg theory of the interacting state. Our self-consistent calculations show that an s-wave symmetry of the superconducting gap is compatible only with a complete absence of spin fluctuations. When spin fluctuations are present, the sign-changing nodeless d-wave pairing symmetry is always obtained, yet the essential ingredient for explaining the gap magnitude and critical temperature is still the interfacial electron-phonon interaction.","PeriodicalId":8514,"journal":{"name":"arXiv: Superconductivity","volume":"412 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79946657","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}
引用次数: 6
Shadowed triplet pairings in Hund's metals with spin-orbit coupling 带有自旋轨道耦合的汉德金属中的阴影三重态配对
arXiv: Superconductivity Pub Date : 2020-09-18 DOI: 10.1103/PHYSREVRESEARCH.3.013001
Jonathan Clepkens, Austin W. Lindquist, H. Kee
{"title":"Shadowed triplet pairings in Hund's metals with spin-orbit coupling","authors":"Jonathan Clepkens, Austin W. Lindquist, H. Kee","doi":"10.1103/PHYSREVRESEARCH.3.013001","DOIUrl":"https://doi.org/10.1103/PHYSREVRESEARCH.3.013001","url":null,"abstract":"Hund's coupling in multiorbital systems allows for the possibility of even-parity orbital-antisymmetric spin-triplet pairing, which can be stabilized by spin-orbit coupling (SOC). While this pairing expressed in the orbital basis is uniform and spin-triplet, it appears in the band basis as a pseudospin-singlet, with the momentum dependence determined by the SOC and the underlying triplet character remaining in the form of interband pairing active away from the Fermi energy. Here, we examine the role of momentum-dependent SOC in generating nontrivial pairing symmetries, as well as the hidden triplet nature associated with this interorbital pairing, which we dub a \"shadowed triplet\". Applying this concept to Sr$_{2}$RuO$_{4}$, we first derive several forms of SOC with $d$-wave form factors from a microscopic model, and subsequently we show that for a range of SOC parameters, a pairing state with $s+id_{xy}$ symmetry can be stabilized. Such a pairing state is distinct from pure spin-singlet and -triplet pairings due to its unique character of pseudospin-energy locking. We discuss experimental probes to differentiate the shadowed triplet pairing from conventional pseudospin-triplet and -singlet pairings.","PeriodicalId":8514,"journal":{"name":"arXiv: Superconductivity","volume":"70 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86341246","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}
引用次数: 21
Schwinger boson study of superconductivity mediated by antiferromagnetic spin fluctuations 反铁磁自旋涨落介导超导的Schwinger玻色子研究
arXiv: Superconductivity Pub Date : 2020-09-16 DOI: 10.1103/physrevb.102.214502
E. Erlandsen, A. Sudbø
{"title":"Schwinger boson study of superconductivity mediated by antiferromagnetic spin fluctuations","authors":"E. Erlandsen, A. Sudbø","doi":"10.1103/physrevb.102.214502","DOIUrl":"https://doi.org/10.1103/physrevb.102.214502","url":null,"abstract":"We study superconductivity in a normal metal, arising from effective electron-electron interactions mediated by spin-fluctuations in a neighboring antiferromagnetic insulator. Introducing a frustrating next-nearest neighbor interaction in a Neel antiferromagnet with an uncompensated interface, the superconducting critical temperature is found to be enhanced as the frustration is increased. Further, for sufficiently large next-nearest neighbor interaction, the antiferromagnet is driven into a stripe phase, which can also give rise to attractive electron-electron interactions. For the stripe phase, as previously reported for the Neel phase, the superconducting critical temperature is found to be amplified for an uncompensated interface where the normal metal conduction electrons are coupled to only one of the two sublattices of the magnet. The superconducting critical temperature arising from fluctuations in the stripe phase antiferromagnet can be further enhanced by approaching the transition back to the Neel phase.","PeriodicalId":8514,"journal":{"name":"arXiv: Superconductivity","volume":"124 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85972056","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}
引用次数: 3
$mathbb{Z}_2$ Topologically Obstructed Superconducting Order $mathbb{Z}_2$拓扑受阻超导序
arXiv: Superconductivity Pub Date : 2020-09-15 DOI: 10.26226/morressier.5fb692d74d4e91fe5c54c24f
Canon Sun, Y. Li
{"title":"$mathbb{Z}_2$ Topologically Obstructed Superconducting Order","authors":"Canon Sun, Y. Li","doi":"10.26226/morressier.5fb692d74d4e91fe5c54c24f","DOIUrl":"https://doi.org/10.26226/morressier.5fb692d74d4e91fe5c54c24f","url":null,"abstract":"We propose a class of topological superconductivity where the pairing order is $mathbb{Z}_2$ topologically obstructed in a time-reversal invariant system in three dimensions. When two Fermi surfaces are related by time-reversal and mirror symmetries, such as those in a $mathbb{Z}_2$ Dirac semimetal, the inter-Fermi-surface pairing in the weak-coupling regime inherits the band topological obstruction. As a result, the pairing order cannot be well-defined over the entire Fermi surface and forms a time-reversal invariant generalization of U($1$) monopole harmonic pairing. A tight-binding model of the $mathbb{Z}_2$ topologically obstructed superconductor is constructed based on a doped $mathbb{Z}_2$ Dirac semimetal and exhibits nodal gap function. At an open boundary, the system exhibits a time-reversal pair of topologically protected surface states.","PeriodicalId":8514,"journal":{"name":"arXiv: Superconductivity","volume":"13 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85462352","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}
引用次数: 1
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信