期刊
PHYSICAL REVIEW LETTERS
卷 127, 期 18, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.127.187001
关键词
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资金
- Laboratory for Physical Sciences
- JQI-NSF-PFC (NSF) [PHY-1607611]
- NSF [DMR1555135]
Observing two distinct superconducting phases in ABC-stacked trilayer graphene, we investigate electron-acoustic-phonon coupling as a possible pairing mechanism and predict the existence of superconductivity with the highest Tc near the Van Hove singularity.
Motivated by the observation of two distinct superconducting phases in the moireless ABC-stacked rhombohedral trilayer graphene, we investigate the electron-acoustic-phonon coupling as a possible pairing mechanism. We predict the existence of superconductivity with the highest T-c similar to 3 K near the Van Hove singularity. Away from the Van Hove singularity, T-c remains finite in a wide range of doping. In our model, the s-wave spin-singlet and f-wave spin-triplet pairings yield the same T-c, while other pairing states have negligible T-c. Our theory provides a simple explanation for the two distinct superconducting phases in the experiment and suggests that superconductivity and other interaction-driven phases (e.g., ferromagnetism) can have different origins.
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