Spectroscopy of spinons in Coulomb quantum spin liquids

We calculate the effect of the emergent photon on threshold production of spinons in \(U(1)\) Coulomb spin liquids such as quantum spin ice. The emergent Coulomb interaction modifies the threshold production cross-section dramatically, changing the weak turn-on expected from the density of states to...

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Bibliographic Details
Published in:arXiv.org 2019-06
Main Authors: Morampudi, Siddhardh C, Wilczek, Frank, Laumann, Chris R
Format: Article
Language:English
Subjects:
Cerenkov radiation
Momentum
Spin ice
Spin liquid
Online Access:Get full text
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Summary:We calculate the effect of the emergent photon on threshold production of spinons in \(U(1)\) Coulomb spin liquids such as quantum spin ice. The emergent Coulomb interaction modifies the threshold production cross-section dramatically, changing the weak turn-on expected from the density of states to an abrupt onset reflecting the basic coupling parameters. The slow photon typical in existing lattice models and materials suppresses the intensity at finite momentum and allows profuse Cerenkov radiation beyond a critical momentum. These features are broadly consistent with recent numerical and experimental results.
ISSN:2331-8422
DOI:10.48550/arxiv.1906.01628