Spin Hall effect generated by fluctuating vortices in type-II superconductors

Takuya Taira; Yusuke Kato; Masanori Ichioka; Hiroto Adachi

doi:10.1103/PhysRevB.103.134417

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Spin Hall effect generated by fluctuating vortices in type-II superconductors

Takuya Taira, Yusuke Kato, Masanori Ichioka, Hiroto Adachi

DOI 10.1103/PhysRevB.103.134417 · Physical Review B

T1

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Abstract

We theoretically investigate the vortex spin Hall effect, i.e., a novel spin Hall effect driven by the motion of superconducting vortices, by focusing on the role of superconducting fluctuations. Within the BCS-Gor'kov microscopic approach combined with the Kubo formula, we find a strong similarity between the vortex spin Hall effect and the vortex Nernst/Ettingshausen effect. Calculated temperature dependence of the voltage signal due to the inverse vortex spin Hall effect exhibits a strong enhancement by vortex fluctuations. This result not only provides a possible explanation for a prominent peak found in the spin Seebeck effect in a NbN/Y3Fe5O12 system but also leads to a proposal of new experiments using other superconductors with strong fluctuations, such as cuprate or iron-based superconductors.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
NbN Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown