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arXiv · 1909.02921

Odd-frequency superconductivity and Meissner effect in the doped topological insulator Bi$_2$Se$_3$

Johann Schmidt·Fariborz Parhizgar·Annica M. Black-Schaffer
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Abstract

Doped Bi$_2$Se$_3$ is proposed to be a nematic superconductor originating from unusual inter-orbital pairing. We classify all induced superconducting pair correlations in Bi$_2$Se$_3$ and discover that intra-orbital odd-frequency pairing dominates over a significant range of frequencies. Moreover, we explore the contributions of even- and odd-frequency pairing to the Meissner effect, including separating intra- and inter-band processes in the response function. Contrary to expectations, and due to inter-band contributions, we find a diamagnetic odd-frequency Meissner effect.

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Johann Schmidt, Fariborz Parhizgar, Annica M. Black-Schaffer. 2020-06-04. Odd-frequency superconductivity and Meissner effect in the doped topological insulator Bi$_2$Se$_3$. https://doi.org/10.1103/physrevb.101.180512

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