1203.2500 (Liang Chen et al.)
Liang Chen, Shaolong Wan
The copper intercalated topological insulator Bi$_2$Se$_3$ is reported to exist a superconductivity phase at 3.8K, a recent point-contact spectroscopy experiment demonstrated that there is a zero-bias conductance peak of this material. We propose three possible momentum-dependent pairing potentials for this superconductor, and calculate the surface spectral function and surface density of state for the systems with these pairing potentials. We find a $C_3$ rotation symmetric pairing potential with six point nodes seems to be promising, we hope our proposal can be judged by future experiment.
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http://arxiv.org/abs/1203.2500
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