Giant nonreciprocal magnetotransport in bulk trigonal superconductor PbTaSe2

T. Ideue; S. Koshikawa; H. Namiki; T. Sasagawa; Y. Iwasa

doi:10.1103/PhysRevResearch.2.042046

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Giant nonreciprocal magnetotransport in bulk trigonal superconductor PbTaSe2

T. Ideue, S. Koshikawa, H. Namiki, T. Sasagawa, Y. Iwasa

DOI 10.1103/PhysRevResearch.2.042046 · Physical Review Research

T1

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Abstract

We report giant bulk rectification in the bulk trigonal superconductor PbTaSe2. Nonreciprocal magnetotransport originating from a vortex ratchet motion was successfully observed, showing a significant enhancement during the superconducting transition, which is considered a model behavior for three-dimensional noncentrosymmetric superconductors with strong vortex pinning. Moreover, an unprecedented sign change of nonreciprocal transport was observed with increasing current, which indicates that the rectification effect can be tuned by the current value as well as the magnetic field. The present results represent the rich vortex dynamics and offer a principle for current control of rectification in noncentrosymmetric bulk superconductors.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
PbTaSe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	3.7	Pressure not reported	zero_resistance
MoS2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
NbSe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown