Little-Parks oscillation and <math xmlns="http://www.w3.org/1998/Math/MathML"><mi mathvariant="normal">d</mi></math>-vector texture in spin-triplet superconducting rings with bias current

Kazushi Aoyama

doi:10.1103/PhysRevB.106.L060502

Letter

Little-Parks oscillation and $d$ -vector texture in spin-triplet superconducting rings with bias current

Kazushi Aoyama

Department of Earth and Space Science, Graduate School of Science, Osaka University, Osaka 560-0043, Japan

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Phys. Rev. B 106, L060502 – Published 2 August, 2022

DOI: https://doi.org/10.1103/PhysRevB.106.L060502

Abstract

We theoretically investigate the critical bias current $j_{c}$ for a superconducting (SC) ring in a magnetic field. Based on the Ginzburg-Landau theory, we show that $j_{c}$ exhibits a Little-Parks (LP) oscillation as a function of the magnetic flux passing through the ring, similarly to the LP oscillation in the SC transition temperature. It is also found that for a spin-triplet SC ring, the $d$ vector rotates to yield a larger $j_{c}$ , forming a texture along the circumference of the ring. Experimental implications of our result are discussed.

Physical Review B

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Little-Parks oscillation and $d$ -vector texture in spin-triplet superconducting rings with bias current

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Little-Parks oscillation and d-vector texture in spin-triplet superconducting rings with bias current

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Little-Parks oscillation and $d$ -vector texture in spin-triplet superconducting rings with bias current