Kondo enabled transmutation between spinons and superconducting vortices: Origin of magnetic memory in 4 H b − TaS 2

Lin, Shi-Zeng

doi:10.1103/PhysRevResearch.6.023224

Kondo enabled transmutation between spinons and superconducting vortices: Origin of magnetic memory in $4 H b − {TaS}_{2}$

Journal Article · Mon Jun 03 04:00:00 EDT 2024 · Physical Review Research

DOI:https://doi.org/10.1103/PhysRevResearch.6.023224· OSTI ID:2369948

Recent experiments [Persky , ] demonstrate a magnetic memory effect in $4 H b − {TaS}_{2}$ above its superconducting transition temperature, where Abriokosov vortices are spontaneously generated by lowering the temperature at zero magnetic field after field training the normal state. Motivated by the experiment, we propose the chiral quantum spin liquid (QSL) stabilized in the constituent layers of $4 H b − {TaS}_{2}$ as a mechanism. We model $4 H b − {TaS}_{2}$ as coupled layers of the chiral QSL and the superconductor. Through the Kondo coupling between the localized moments and conduction electrons, there is mutual transmutation between spinons and vortices during the thermal-cycling process, which yields the magnetic memory effect observed in experiments. We also propose a mechanism to stabilize chiral and nematic superconductivity in $4 H b − {TaS}_{2}$ through the Kondo coupling of conduction electrons to the chiral QSL. Our picture suggests $4 H b − {TaS}_{2}$ as an exciting platform to explore the interplay between QSL and superconductivity through the Kondo effect.

Published by the American Physical Society 2024

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Sponsoring Organization:: USDOE

Grant/Contract Number:: 89233218CNA000001

OSTI ID:: 2369948

Alternate ID(s):: OSTI ID: 2440688

Journal Information:: Physical Review Research, Journal Name: Physical Review Research Journal Issue: 2 Vol. 6; ISSN 2643-1564; ISSN PPRHAI

Publisher:: American Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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Kondo enabled transmutation between spinons and superconducting vortices: Origin of magnetic memory in 4 H b − TaS 2

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Kondo enabled transmutation between spinons and superconducting vortices: Origin of magnetic memory in $4 H b − {TaS}_{2}$