Sábháilte in:
| Príomhchruthaitheoirí: | , , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Formáid: | Preprint |
| Foilsithe / Cruthaithe: |
2023
|
| Ábhair: | |
| Rochtain ar líne: | https://arxiv.org/abs/2307.01976 |
| Clibeanna: |
Cuir clib leis
Níl clibeanna ann, Bí ar an gcéad duine le clib a chur leis an taifead seo!
|
| _version_ | 1866929739765121024 |
|---|---|
| author | Lygouras, Chris J. Zhang, Junyi Gautreau, Jonah Pula, Mathew Sharma, Sudarshan Gao, Shiyuan Berry, Tanya Halloran, Thomas Orban, Peter Grissonnanche, Gael Chamorro, Juan R. Mikuri, Kagetora Bhoi, Dilip K. Siegler, Maxime A. Livi, Kenneth K. Uwatoko, Yoshiya Nakatsuji, Satoru Ramshaw, B. J. Li, Yi Luke, Graeme M. Broholm, Collin L. McQueen, Tyrel M. |
| author_facet | Lygouras, Chris J. Zhang, Junyi Gautreau, Jonah Pula, Mathew Sharma, Sudarshan Gao, Shiyuan Berry, Tanya Halloran, Thomas Orban, Peter Grissonnanche, Gael Chamorro, Juan R. Mikuri, Kagetora Bhoi, Dilip K. Siegler, Maxime A. Livi, Kenneth K. Uwatoko, Yoshiya Nakatsuji, Satoru Ramshaw, B. J. Li, Yi Luke, Graeme M. Broholm, Collin L. McQueen, Tyrel M. |
| contents | Studying superconductivity in Dirac semimetals is an important step in understanding quantum matter with topologically non-trivial order parameters. We report on the properties of the superconducting phase in single crystals of the Dirac material LaCuSb2 prepared by the self-flux method. We find that chemical and hydrostatic pressure drastically suppress the superconducting transition. Furthermore, due to large Fermi surface anisotropy, magnetization and muon spin relaxation measurements reveal Type-II superconductivity for applied magnetic fields along the $a$-axis, and Type-I superconductivity for fields along the $c$-axis. Specific heat confirms the bulk nature of the transition, and its deviation from single-gap $s$-wave BCS theory suggests multigap superconductivity. Our tight-binding model points to an anisotropic gap function arising from the spin-orbital texture near the Dirac nodes, providing an explanation for the appearance of an anomaly in specific heat well below $T_c$. Given the existence of superconductivity in a material harboring Dirac fermions, LaCuSb2 proves an interesting material candidate in the search for topological superconductivity. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2307_01976 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Fragile superconductivity in a Dirac metal Lygouras, Chris J. Zhang, Junyi Gautreau, Jonah Pula, Mathew Sharma, Sudarshan Gao, Shiyuan Berry, Tanya Halloran, Thomas Orban, Peter Grissonnanche, Gael Chamorro, Juan R. Mikuri, Kagetora Bhoi, Dilip K. Siegler, Maxime A. Livi, Kenneth K. Uwatoko, Yoshiya Nakatsuji, Satoru Ramshaw, B. J. Li, Yi Luke, Graeme M. Broholm, Collin L. McQueen, Tyrel M. Superconductivity Studying superconductivity in Dirac semimetals is an important step in understanding quantum matter with topologically non-trivial order parameters. We report on the properties of the superconducting phase in single crystals of the Dirac material LaCuSb2 prepared by the self-flux method. We find that chemical and hydrostatic pressure drastically suppress the superconducting transition. Furthermore, due to large Fermi surface anisotropy, magnetization and muon spin relaxation measurements reveal Type-II superconductivity for applied magnetic fields along the $a$-axis, and Type-I superconductivity for fields along the $c$-axis. Specific heat confirms the bulk nature of the transition, and its deviation from single-gap $s$-wave BCS theory suggests multigap superconductivity. Our tight-binding model points to an anisotropic gap function arising from the spin-orbital texture near the Dirac nodes, providing an explanation for the appearance of an anomaly in specific heat well below $T_c$. Given the existence of superconductivity in a material harboring Dirac fermions, LaCuSb2 proves an interesting material candidate in the search for topological superconductivity. |
| title | Fragile superconductivity in a Dirac metal |
| topic | Superconductivity |
| url | https://arxiv.org/abs/2307.01976 |