首页|Spin-polarized pairing induced by the magnetic field in the Bernal bilayer graphene

Spin-polarized pairing induced by the magnetic field in the Bernal bilayer graphene

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Recent experimental findings have demonstrated the occurrence of superconductivity in Bernal bilayer graphene when induced by a magnetic field.In this study,we conduct a theoretical investigation of the potential pairing symmetry within this superconducting system.By developing a theoretical model,we primarily calculate the free energy of the system with p+ip-wave parallel spin pairing,p+ip-wave anti-parallel spin pairing and d+i d-wave pairing symmetry.Our results confirm that the magnetic field is indeed essential for generating the superconductivity.We discover that the p+ip-wave parallel spin pairing leads to a lower free energy for the system.The numerical calculations of the energy band structure,zero-energy spectral function and density of states for each of the three pairing symmetries under consideration show a strong consistency with the free energy results.

superconductivitymagnetic field inductionpairing symmetryBernal bilayer graphene

黄妍、周涛

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Guangdong Basic Research Center of Excellence for Structure and Fundamental Interactions of Matter,Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials,School of Physics,Guangdong-Hong Kong Joint Laboratory of Quantum Matter,and Frontier Research Institute for Physics,South China Normal University,Guangzhou 510006,China

国家自然科学基金广东省自然科学基金

120741302021A1515012340

2024

10.1088/1674-1056/ad102f

中国物理B(英文版)
中国物理学会和中国科学院物理研究所

中国物理B(英文版)

CSTPCDEI
影响因子：0.995
ISSN：1674-1056
年,卷(期)：2024.33(4)
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