Two scenarios for superconductivity in CeRh_{2}As_{2}
CeRh_{2}As_{2}, a nonsymmorphic heavy fermion material, was recently reported to host a remarkable temperature versus z-axis magnetic-field phase diagram with two superconducting phases. In this material, the two inequivalent Ce sites per unit cell, related by inversion symmetry, introduce a sublatt...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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American Physical Society
2021-06-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.3.023204 |
| _version_ | 1797210998334029824 |
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| author | David Möckli Aline Ramires |
| author_facet | David Möckli Aline Ramires |
| author_sort | David Möckli |
| collection | DOAJ |
| description | CeRh_{2}As_{2}, a nonsymmorphic heavy fermion material, was recently reported to host a remarkable temperature versus z-axis magnetic-field phase diagram with two superconducting phases. In this material, the two inequivalent Ce sites per unit cell, related by inversion symmetry, introduce a sublattice structure corresponding to an extra internal degree of freedom. Here we propose a classification of the possible superconducting states in CeRh_{2}As_{2} from the two Ce-sites' perspective. Based on the superconducting fitness analysis and the quasiclassical Eilenberger equations, we discuss two limits: Rashba spin-orbit coupling and interlayer hopping dominated normal state. In both limits, we are able to find two scenarios that generate phase diagrams in qualitative agreement with experiments: (i) intrasublattice pairing with an even-odd transition under z-axis magnetic field and (ii) intersublattice pairing with an odd-odd transition under z-axis magnetic field. |
| first_indexed | 2024-04-24T10:19:30Z |
| format | Article |
| id | doaj.art-75b2f3b81ec941aebd0dfe968805b4e2 |
| institution | Directory Open Access Journal |
| issn | 2643-1564 |
| language | English |
| last_indexed | 2024-04-24T10:19:30Z |
| publishDate | 2021-06-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj.art-75b2f3b81ec941aebd0dfe968805b4e22024-04-12T17:10:42ZengAmerican Physical SocietyPhysical Review Research2643-15642021-06-013202320410.1103/PhysRevResearch.3.023204Two scenarios for superconductivity in CeRh_{2}As_{2}David MöckliAline RamiresCeRh_{2}As_{2}, a nonsymmorphic heavy fermion material, was recently reported to host a remarkable temperature versus z-axis magnetic-field phase diagram with two superconducting phases. In this material, the two inequivalent Ce sites per unit cell, related by inversion symmetry, introduce a sublattice structure corresponding to an extra internal degree of freedom. Here we propose a classification of the possible superconducting states in CeRh_{2}As_{2} from the two Ce-sites' perspective. Based on the superconducting fitness analysis and the quasiclassical Eilenberger equations, we discuss two limits: Rashba spin-orbit coupling and interlayer hopping dominated normal state. In both limits, we are able to find two scenarios that generate phase diagrams in qualitative agreement with experiments: (i) intrasublattice pairing with an even-odd transition under z-axis magnetic field and (ii) intersublattice pairing with an odd-odd transition under z-axis magnetic field.http://doi.org/10.1103/PhysRevResearch.3.023204 |
| spellingShingle | David Möckli Aline Ramires Two scenarios for superconductivity in CeRh_{2}As_{2} Physical Review Research |
| title | Two scenarios for superconductivity in CeRh_{2}As_{2} |
| title_full | Two scenarios for superconductivity in CeRh_{2}As_{2} |
| title_fullStr | Two scenarios for superconductivity in CeRh_{2}As_{2} |
| title_full_unstemmed | Two scenarios for superconductivity in CeRh_{2}As_{2} |
| title_short | Two scenarios for superconductivity in CeRh_{2}As_{2} |
| title_sort | two scenarios for superconductivity in cerh 2 as 2 |
| url | http://doi.org/10.1103/PhysRevResearch.3.023204 |
| work_keys_str_mv | AT davidmockli twoscenariosforsuperconductivityincerh2as2 AT alineramires twoscenariosforsuperconductivityincerh2as2 |