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Field-angle resolved flux-flow resistivity as a phase-sensitive probe of unconventional Cooper pairing

机译:场角分辨通量-流阻作为非常规库珀配对的相敏探针

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摘要

We theoretically investigate the applied magnetic field-angle dependence of the flux-flow resistivity ρ_f(α_M) for a uniaxially anisotropic Fermi surface. ρ_f is related to the quasiparticle scattering rate inside a vortex core, which reflects the sign change in the superconducting pair potential. We find that ρ_f(α_M) is sensitive to the sign change in the pair potential and has its maximum when the magnetic field is parallel to the gap-node direction. We propose the measurement of the field-angle dependent oscillation of ρ_f(α_M) as a phase-sensitive field-angle resolved experiment.
机译:我们从理论上研究了单轴各向异性费米面的通量-流阻率ρ_f(α_M)的施加的磁场角度依赖性。 ρ_f与涡旋核内部的准粒子散射率有关,后者反映了超导对电势中的符号变化。我们发现ρ_f(α_M)对偶对电位的符号变化敏感,并且在磁场平行于间隙节点方向时具有最大值。我们提议将ρ_f(α_M)的依赖于场角的振荡的测量作为相位敏感的场角分辨实验。

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