Turning a band insulator into an exotic superconductor.
Turning a band insulator into an exotic superconductor.
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DOI:
10.1038/ncomms5144
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发表时间:
2014-07-11
影响因子:
16.6
通讯作者:
Savrasov, Sergey Y.
中科院分区:
文献类型:
--
作者:
Wan, Xiangang;Savrasov, Sergey Y.
Understanding exotic, non-s-wave-like states of Cooper pairs is important and may lead to new superconductors with higher critical temperatures and novel properties. Their existence is known to be possible but has always been thought to be associated with non-traditional mechanisms of superconductivity where electronic correlations play an important role. Here we use a first principles linear response calculation to show that in doped Bi2Se3 an unconventional p-wave-like state can be favoured via a conventional phonon-mediated mechanism, as driven by an unusual, almost singular behaviour of the electron–phonon interaction at long wavelengths. This may provide a new platform for our understanding of superconductivity phenomena in doped band insulators. Most superconductors that exhibit exotic pairing symmetries are derived from host materials that are Mott insulators. Xiangang Wan and Sergey Savrasov show that it may be possible to realize an exotic p-wave superconductor in doped Bi2Se3, which is a topological band insulator.
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