Pair Density Waves and Supercurrent Diode Effect in Altermagnets
2024.08.07 15:20
| 날짜 | 2024-08-14 11:00 |
|---|---|
| 연사 | Dr. GIBAIK SIM (University of Tennessee) |
| 장소 | E6, #3441 |
물리학과 구성원분들께,
아래와 같이 세미나를 개최하고자 하오니, 관심있는 분들의 많은 참석 부탁드립니다.
Date: 11:00 am, 14th Aug (Wed)
Place: E6, #3441
Speaker: Dr. GIBAIK SIM (University of Tennessee)
Title: Pair Density Waves and Supercurrent Diode Effect in Altermagnets
Abstract:
Metallic altermagnets are unusual collinear magnets that feature zero net magnetization with momentum-dependent spin splitting [1,2]. In our recent work [3], we show that this spin splitting can induce pair density wave states even in the absence of external magnetic fields.
Focusing on BCS-type attractive interactions, we find the stabilization of symmetrically distinct pair density wave states depending on the chemical potential. These states include Fulde-Ferrell and Fulde-Ferrell* states, both of which break inversion symmetry [4]. We investigate the supercurrent properties and discover non-reciprocal supercurrents for both states with distinct spatial dependencies. We propose that the supercurrent diode effect [5] can serve as an experimental tool for distinguishing between different pair density waves in metallic altermagnets and discuss the relation to material candidates.[1] Šmejkal, Libor, Jairo Sinova, and Tomas Jungwirth. Physical Review X 12.4 (2022): 040501.
[2] Šmejkal, Libor, Jairo Sinova, and Tomas Jungwirth. Physical Review X 12.3 (2022): 031042.
[3] Sim, GiBaik, and Johannes Knolle. arXiv preprint arXiv:2407.01513 (2024).
[4] Agterberg, Daniel F., et al. Annual Review of Condensed Matter Physics 11.1 (2020): 231-270.
[5] Nadeem, Muhammad, Michael S. Fuhrer, and Xiaolin Wang. Nature Reviews Physics 5.10 (2023): 558-577.
[2] Šmejkal, Libor, Jairo Sinova, and Tomas Jungwirth. Physical Review X 12.3 (2022): 031042.
[3] Sim, GiBaik, and Johannes Knolle. arXiv preprint arXiv:2407.01513 (2024).
[4] Agterberg, Daniel F., et al. Annual Review of Condensed Matter Physics 11.1 (2020): 231-270.
[5] Nadeem, Muhammad, Michael S. Fuhrer, and Xiaolin Wang. Nature Reviews Physics 5.10 (2023): 558-577.
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