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

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 $\mathbf{d}$-vector rotates to yield a larger $j_c$, forming a texture along the circumference of the ring. Experimental implications of our result are discussed.

arXiv comment6 pages, 3 figures

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• Superconducting diode effect and interference patterns in Kagome CsV3Sb5
• Stripe order and diode effect in two-dimensional Rashba superconductors
• Half-quantum flux in spin-triplet superconducting rings with bias current
• Theory of the Little-Parks effect in spin-triplet superconductors
• Observation of the crossover from quantum fluxoid to half-quantum fluxoid in a chiral superconducting device