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

Abstract

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.

arXiv comment8 pages, 2 figures

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Cited by in corpus (2)

• Quantum noise spectroscopy of dynamical critical phenomena
• Proposal to detect emergent gauge field and its Meissner effect in spin liquids using NV Centers