標題: Strong magnetic field induces superconductivity in a Weyl semimetal
作者: Rosenstein, Baruch
Shapiro, B. Ya.
Li, Dingping
Shapiro, I.
電子物理學系
Department of Electrophysics
公開日期: 29-Dec-2017
摘要: Microscopic theory of the normal-to-superconductor coexistence line of a multiband Weyl superconductor subjected to magnetic field is constructed. It is shown that the Weyl semimetal that is nonsuperconducting or having a small critical temperature T-c at zero field might become a superconductor at higher temperatures when the magnetic field is tuned to a series of quantized values H-n. The pairing occurs on Landau levels. It is argued that the phenomenon is detectable much easier in Weyl semimetals than in parabolic band metals since the quantum limit already has been approached in several Weyl materials. The effect of Zeeman coupling leading to splitting of the reentrant superconducting regions on the magnetic phase diagram is considered. An experimental signature of the superconductivity on Landau levels is the reduction of magnetoresistivity. This has been observed already in Cd3As2 and several other compounds. The novel kind of quantum oscillations of magnetoresistance detected in ZrTe5 is discussed along these lines.
URI: http://dx.doi.org/10.1103/PhysRevB.96.224517
http://hdl.handle.net/11536/144311
ISSN: 2469-9950
DOI: 10.1103/PhysRevB.96.224517
期刊: PHYSICAL REVIEW B
Volume: 96
Issue: 22
起始頁: 0
結束頁: 0
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