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Hong X, Gillig M, Hanna ARN, Chillal S, Islam ATMN, Lake B, Büchner B, Hess C. Spinon Heat Transport in the Three-Dimensional Quantum Magnet PbCuTe_{2}O_{6}. Phys Rev Lett 2023; 131:256701. [PMID: 38181358 DOI: 10.1103/physrevlett.131.256701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Accepted: 11/15/2023] [Indexed: 01/07/2024]
Abstract
Quantum spin liquids (QSLs) are novel phases of matter which remain quantum disordered even at the lowest temperature. They are characterized by emergent gauge fields and fractionalized quasiparticles. Here we show that the sub-kelvin thermal transport of the three-dimensional S=1/2 hyperhyperkagome quantum magnet PbCuTe_{2}O_{6} is governed by a sizeable charge-neutral fermionic contribution which is compatible with the itinerant fractionalized excitations of a spinon Fermi surface. We demonstrate that this hallmark feature of the QSL state is remarkably robust against sample crystallinity, large magnetic field, and field-induced magnetic order, ruling out the imitation of QSL features by extrinsic effects. Our findings thus reveal the characteristic low-energy features of PbCuTe_{2}O_{6} which qualify this compound as a true QSL material.
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Affiliation(s)
- Xiaochen Hong
- Fakultät für Mathematik und Naturwissenschaften, Bergische Universität Wuppertal, Gaußstraße 20, 42119 Wuppertal, Germany
- Leibniz-Institute for Solid State and Materials Research (IFW-Dresden), Helmholtzstraße 20, 01069 Dresden, Germany
| | - Matthias Gillig
- Leibniz-Institute for Solid State and Materials Research (IFW-Dresden), Helmholtzstraße 20, 01069 Dresden, Germany
| | - Abanoub R N Hanna
- Institut für Festkörperforschung, Technische Universität Berlin, Hardenbergstraße 36, 10623 Berlin, Germany
- Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner Platz 1, 14109 Berlin, Germany
| | - Shravani Chillal
- Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner Platz 1, 14109 Berlin, Germany
| | - A T M Nazmul Islam
- Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner Platz 1, 14109 Berlin, Germany
| | - Bella Lake
- Institut für Festkörperforschung, Technische Universität Berlin, Hardenbergstraße 36, 10623 Berlin, Germany
- Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner Platz 1, 14109 Berlin, Germany
| | - Bernd Büchner
- Leibniz-Institute for Solid State and Materials Research (IFW-Dresden), Helmholtzstraße 20, 01069 Dresden, Germany
- Institute of Solid State and Materials Physics and Würzburg-Dresden Cluster of Excellence ct.qmat, Technische Universität Dresden, 01062 Dresden, Germany
| | - Christian Hess
- Fakultät für Mathematik und Naturwissenschaften, Bergische Universität Wuppertal, Gaußstraße 20, 42119 Wuppertal, Germany
- Leibniz-Institute for Solid State and Materials Research (IFW-Dresden), Helmholtzstraße 20, 01069 Dresden, Germany
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