Stable Sarma state in two-band Fermi systems
作者： Lianyi He , Pengfei Zhuang
DOI: 10.1103/PHYSREVB.79.024511
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摘要: We investigate fermionic superconductivity with mismatched Fermi surfaces in a general two-band system. The exchange interaction between the two bands changes significantly stability structure of pairing states. Sarma state gapless surfaces, which is always unstable single-band systems, can be stable ground systems. To realize visible mismatch window for state, conditions should satisfied: nonzero interband and large asymmetry bands.
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