Distinguishing dipolar and octupolar quantum spin ices using contrasting magnetostriction signatures

Recently there have been a number of experiments on Ce\(_2\)Zr\(_2\)O\(_7\) and Ce\(_2\)Sn\(_2\)O\(_7\), suggesting that these materials host a three-dimensional quantum spin liquid with emergent photons and fractionalized spinon excitations. However, the interpretation of the data to determine the...

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Bibliographic Details
Published in:arXiv.org 2020-04
Main Authors: Patri, Adarsh S, Hosoi, Masashi, Yong Baek Kim
Format: Article
Language:English
Subjects:
Broken symmetry
Dipoles
Magnetostriction
Spin ice
Spin liquid
Zirconium
Online Access:Get full text
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Summary:Recently there have been a number of experiments on Ce\(_2\)Zr\(_2\)O\(_7\) and Ce\(_2\)Sn\(_2\)O\(_7\), suggesting that these materials host a three-dimensional quantum spin liquid with emergent photons and fractionalized spinon excitations. However, the interpretation of the data to determine the precise nature of the quantum spin liquids is still under debate. The Kramers doublet in Ce\(^{3+}\) local moment offers unusual pseudo-spin degrees of freedom as the \(x\) and \(z\) components transform as a dipole and \(y\) component as an octupole. This leads to a variety of possible quantum spin liquid (or quantum spin ice) phases on the pyrochlore lattice of Ce\(^{3+}\) moments. In this work, we theoretically propose that magnetostriction would be able to distinguish the dipolar (D-QSI) and octupolar (O-QSI) quantum spin ice, where the dipolar or octupolar components possess the respective spin ice correlations. We show that the magnetostriction in various configurations can be used as a selection rule to differentiate not only D-QSI and O-QSI, but also a number of competing broken symmetry states.
ISSN:2331-8422
DOI:10.48550/arxiv.2001.02685