Probing the Quantum Noise of the Spinon Fermi Surface with NV Centers

We study the transverse electrical conductivity and the corresponding magnetic noise of a two-dimensional U(1) spin liquid state with a spinon Fermi surface. We show that in the quasi-static regime these responses have the same wave-vector dependence as that of a metal but are reduced by a dimension...

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Bibliographic Details
Published in:arXiv.org 2022-05
Main Authors: Jun Yong Khoo, Pientka, Falko, Lee, Patrick A, Inti Sodemann Villadiego
Format: Article
Language:English
Subjects:
Diamagnetism
Electrical resistivity
Fermi surfaces
Materials selection
Spin liquid
Online Access:Get full text
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Summary:We study the transverse electrical conductivity and the corresponding magnetic noise of a two-dimensional U(1) spin liquid state with a spinon Fermi surface. We show that in the quasi-static regime these responses have the same wave-vector dependence as that of a metal but are reduced by a dimensionless pre-factor controlled by the ratio of orbital diamagnetic susceptibilities of the spinons and chargons, correcting previous work. We estimate that this quasi-static regime is comfortably accessed by the typical NV center splittings of a few GHz and estimate that the expected T1 times for an NV center placed above candidate materials, such as the organic dmit and ET salts, monolayer 1T-TaS2/Se2, would range from several tens to a few hundred milliseconds.
ISSN:2331-8422
DOI:10.48550/arxiv.2205.06822