Stability of Unconventional Superconductivity on Surfaces of Topological Insulators
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概要
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Superconductivity on the surface of topological insulators is known to be anisotropic and unconventional in that the symmetry is the mixture of s-wave and nodeless p-wave component under certain conditions. In contrast to Anderson's theorem for the insensitivity of the s-wave superconducting critical temperature to the nonmagnetic (time-reversal symmetric (TRS)) impurities, anisotropic superconductors including nodeless p-wave one are in general fragile even with small concentration of the TRS impurities. By employing the Abrikosov--Gor'kov theory, we clarify that this type of unconventional superconductivity emergent on the surface state of the strong topological insulators robustly survive against TRS impurities.
- 2011-06-15
著者
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Imada Masatoshi
Department Of Applied Physics University Of Tokyo
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Yamaji Youhei
Department Of Applied Physics University Of Tokyo
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Yamaji Youhei
Department of Applied Physics, University of Tokyo, Bunkyo, Tokyo 113-8656, Japan
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Ito Yuto
Department of Applied Physics, University of Tokyo, Bunkyo, Tokyo 113-8656, Japan
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