Interplay of superconductivity and charge-density-wave order in kagome materials
In the AV_{3}Sb_{5} (A = K, Rb, Cs) kagome materials, superconductivity coexists with a charge density wave (CDW), constituting a new platform to study the interplay of these two orders. Despite extensive research, the symmetry of the superconducting order parameter remains disputed, with experiment...
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American Physical Society
2025-05-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.7.023129 |
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| author | Sofie Castro Holbæk Mark H. Fischer |
| author_facet | Sofie Castro Holbæk Mark H. Fischer |
| author_sort | Sofie Castro Holbæk |
| collection | DOAJ |
| description | In the AV_{3}Sb_{5} (A = K, Rb, Cs) kagome materials, superconductivity coexists with a charge density wave (CDW), constituting a new platform to study the interplay of these two orders. Despite extensive research, the symmetry of the superconducting order parameter remains disputed, with experiments seemingly supporting different conclusions. As key aspects of the physics might lie in the intertwining of electronic orders, a better understanding of the impact of the CDW on superconductivity is crucial. In this paper, we develop a phenomenological framework to study the interplay of superconductivity and CDW order. In particular, we derive a Ginzburg-Landau free energy for both superconducting and CDW order parameters. Given the unclear nature of the superconducting state, we discuss general pairing symmetries with a focus on s-wave, d-wave, and pair-density-wave order parameters. Motivated by experiments, we consider the additional breaking of time-reversal or point-group symmetries of the CDW and determine in detail the consequences for the superconducting state. Our results show how the superconducting state mimics the broken symmetries of the CDW and can guide future microscopic calculations, as well as the experimental identification of the superconducting state in the AV_{3}Sb_{5} compounds. |
| format | Article |
| id | doaj-art-86a2f6a7e7ea40aa86e873dc631945c9 |
| institution | DOAJ |
| issn | 2643-1564 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | American Physical Society |
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| series | Physical Review Research |
| spelling | doaj-art-86a2f6a7e7ea40aa86e873dc631945c92025-08-20T03:09:28ZengAmerican Physical SocietyPhysical Review Research2643-15642025-05-017202312910.1103/PhysRevResearch.7.023129Interplay of superconductivity and charge-density-wave order in kagome materialsSofie Castro HolbækMark H. FischerIn the AV_{3}Sb_{5} (A = K, Rb, Cs) kagome materials, superconductivity coexists with a charge density wave (CDW), constituting a new platform to study the interplay of these two orders. Despite extensive research, the symmetry of the superconducting order parameter remains disputed, with experiments seemingly supporting different conclusions. As key aspects of the physics might lie in the intertwining of electronic orders, a better understanding of the impact of the CDW on superconductivity is crucial. In this paper, we develop a phenomenological framework to study the interplay of superconductivity and CDW order. In particular, we derive a Ginzburg-Landau free energy for both superconducting and CDW order parameters. Given the unclear nature of the superconducting state, we discuss general pairing symmetries with a focus on s-wave, d-wave, and pair-density-wave order parameters. Motivated by experiments, we consider the additional breaking of time-reversal or point-group symmetries of the CDW and determine in detail the consequences for the superconducting state. Our results show how the superconducting state mimics the broken symmetries of the CDW and can guide future microscopic calculations, as well as the experimental identification of the superconducting state in the AV_{3}Sb_{5} compounds.http://doi.org/10.1103/PhysRevResearch.7.023129 |
| spellingShingle | Sofie Castro Holbæk Mark H. Fischer Interplay of superconductivity and charge-density-wave order in kagome materials Physical Review Research |
| title | Interplay of superconductivity and charge-density-wave order in kagome materials |
| title_full | Interplay of superconductivity and charge-density-wave order in kagome materials |
| title_fullStr | Interplay of superconductivity and charge-density-wave order in kagome materials |
| title_full_unstemmed | Interplay of superconductivity and charge-density-wave order in kagome materials |
| title_short | Interplay of superconductivity and charge-density-wave order in kagome materials |
| title_sort | interplay of superconductivity and charge density wave order in kagome materials |
| url | http://doi.org/10.1103/PhysRevResearch.7.023129 |
| work_keys_str_mv | AT sofiecastroholbæk interplayofsuperconductivityandchargedensitywaveorderinkagomematerials AT markhfischer interplayofsuperconductivityandchargedensitywaveorderinkagomematerials |