Observation of nonreciprocal superconducting critical field

Miyasaka, Yuta; Kawarazaki, Ryo; Narita, Hideki; Ando, Fuyuki; Ikeda, Yuhei; Hisatomi, Ryusuke; Daido, Akito; Shiota, Yoichi; Moriyama, Takahiro; Yanase, Youichi; Ono, Teruo

doi:10.35848/1882-0786/ac03c0

Cited by 31 publications

(21 citation statements)

References 31 publications

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“…The sign reversals of ∆j c by increasing the magnetic field at low temperatures have recently been observed [44], which could be explained by our results for the intrinsic SDE. An "inverse effect", the nonreciprocity of the critical magnetic field under applied electric current, has also been reported [45], implying the nonreciprocity as a bulk property of the superconductor. Thus, the SDE with sign reversals implies the crossover of helical superconductivity in the Nb/V/Ta superlattice.…”

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confidence: 86%

Intrinsic Superconducting Diode Effect

Daido,

Ikeda,

Yanase

2021

Preprint

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Stimulated by the recent experiment [F. Ando et al., Nature 584, 373 (2020)], we propose an intrinsic mechanism to cause the superconducting diode effect (SDE). SDE refers to the nonreciprocity of the critical current for the metal-superconductor transition. Among various mechanisms for the critical current, the depairing current is known to be intrinsic to each material and has recently been observed in several superconducting systems. We clarify the temperature scaling of the nonreciprocal depairing current near the critical temperature and point out its significant enhancement at low temperatures. It is also found that the nonreciprocal critical current shows sign reversals upon increasing the magnetic field. These behaviors are understood by the nonreciprocity of the Landau critical momentum and the crossover of the helical superconductivity. The intrinsic SDE unveils the rich phase diagram and functionalities of noncentrosymmetric superconductors.

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confidence: 86%

Intrinsic Superconducting Diode Effect

Daido,

Ikeda,

Yanase

2021

Preprint

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“…At a given magnetic field

, the critical currents are nonreciprocal, and, in a given current-carrying state

, the critical fields are polarity dependent. Both phenomena are manifestations of the supercurrent diode effect ( 30 , 46 ).…”

Section: Theory Of Supercurrent Diode Effectmentioning

confidence: 99%

Supercurrent diode effect and finite-momentum superconductors

Yuan¹,

2022

Proc. Natl. Acad. Sci. U.S.A.

188

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“…At a given magnetic field B = 0, the critical currents are nonreciprocal; and in a given current-carrying state J = 0, the critical fields are polarity dependent. Both phenomena are manifestations of the supercurrent diode effect [26,32].…”

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Supercurrent diode effect and finite momentum superconductivity

Yuan,

2021

Preprint

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When both inversion and time-reversal symmetries are broken, the critical current of a superconductor can be nonreciprocal. In this work we show that in certain classes of two-dimensional superconductors with antisymmetric spin-orbit coupling, Cooper pairs acquire a finite momentum upon the application of an in-plane magnetic field, and as a result, critical currents in the direction parallel and antiparallel to the Cooper pair momentum become unequal. This supercurrent diode effect is also manifested in the polarity-dependence of in-plane critical fields induced by a supercurrent. These nonreciprocal effects may be found in polar SrTiO3 film, few-layer MoTe2 in the T d phase, and twisted bilayer graphene in which the valley degrees of freedom plays the role analogous to spin.

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Observation of nonreciprocal superconducting critical field

Cited by 31 publications

References 31 publications

Intrinsic Superconducting Diode Effect

Intrinsic Superconducting Diode Effect

Supercurrent diode effect and finite-momentum superconductors

Supercurrent diode effect and finite momentum superconductivity

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