Ultra spin liquid in \(\rm Lu_3Cu_2Sb_3O_{14}\)

We analyze measurements of \(C_{\rm mag}/T\), specific heat \(C_{\rm mag}\) divided by temperature \(T\), of the recently observed ultra spin liquid. The measurements are carried out in magnetic fields on the triangular lattice compound \(\rm Lu_3Cu_2Sb_3O_{14}\). We show that the obtained heat capa...

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Bibliographic Details
Published in:arXiv.org 2021-09
Main Authors: Shaginyan, V R, Msezane, A Z, Artamonov, S A, Japaridze, G S, Leevik, Y S
Format: Article
Language:English
Subjects:
Fermions
Heat
Magnetic fields
Specific heat
Spin liquid
Thermodynamic properties
Online Access:Get full text
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Summary:We analyze measurements of \(C_{\rm mag}/T\), specific heat \(C_{\rm mag}\) divided by temperature \(T\), of the recently observed ultra spin liquid. The measurements are carried out in magnetic fields on the triangular lattice compound \(\rm Lu_3Cu_2Sb_3O_{14}\). We show that the obtained heat capacity \(C_{\rm mag}/T\) formed by ultra spin liquid as a function of temperature \(T\) versus magnetic field \(B\) behaves very similar to the electronic specific heat \(C_{el}/T\) of the heavy fermion (HF) metal \(\rm YbRh_2Si_2\) and that of the quantum magnet \(\rm ZnCu_3(OH)_6Cl_2\). We further demonstrate that the spinon effective mass \(M^*\propto C_{\rm mag}/T\) exhibits the universal scaling coinciding with that observed in HF metals and in \(\rm ZnCu_3(OH)_6Cl_2\). Based on these observations we conclude that a strongly correlated spin liquid determines the thermodynamic properties of the ultra spin liquid of \(\rm Lu_3Cu_2Sb_3O_{14}\).
ISSN:2331-8422
DOI:10.48550/arxiv.2105.04943