Journal
PHYSICAL REVIEW LETTERS
Volume 107, Issue 2, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.107.026405
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Funding
- RGC of Hong Kong [HKU7044/08P, HKU7055/09P, HKU7058/11P]
- CRF of Hong Kong
- NSFC [10674179]
- SKPBR of China [2011CB922104]
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A type of electron pairing model with spin-orbit interactions or Zeeman coupling is solved exactly in the framework of the Richardson ansatz. Based on the exact solutions for the case with spin-orbit interactions, it is shown rigorously that the pairing symmetry is of the p + ip wave and the ground state possesses time-reversal symmetry, regardless of the strength of the pairing interaction. Intriguingly, how Majorana fermions can emerge in the system is also elaborated. Exact results are illustrated for two systems, respectively, with spin-orbit interactions and Zeeman coupling.
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