Half-quantum flux in spin-triplet superconducting rings with bias current

Abstract

Effects of a bias electric current have been theoretically investigated in a spin-triplet superconducting ring in a magnetic field. Based on the Ginzburg-Landau theory, we show that the bias current can stabilize a half-quantum-flux (HQF) state via couplings to the Zeeman field and the dipole-type spin-orbit interaction, the latter becoming active when the field is tilted from the ring axis. The emergence of the HQF state is reflected as a field-induced half-quantum-shift in the Little-Parks (LP) oscillation in the critical current. Possible relevance to recent LP experiments is also discussed.

5 pages, 2 figures + supplemental material

References in corpus (7)

• Observation of half-height magnetization steps in Sr2RuO4
• Little-Parks oscillations with half-quantum fluxoid features in Sr2RuO4 micro rings
• Spin-triplet pairing state evidenced by half-quantum flux in a noncentrosymmetric superconductor
• Effect of half-quantum vortices on magnetoresistance of perforated superconducting films
• Disorder and Zeeman coupling induced gap-filling states in the nodeless chiral superconducting Bi/Ni bilayer system
• Little-Parks oscillation and $\mathbf{d}$-vector texture in spin-triplet superconducting rings with bias current
• Higher harmonic resistance oscillations in micro-bridge superconducting Nb ring

Cited by in corpus (2)

• Stripe order and diode effect in two-dimensional Rashba superconductors
• Observation of the crossover from quantum fluxoid to half-quantum fluxoid in a chiral superconducting device