Please use this identifier to cite or link to this item: http://dr.iiserpune.ac.in:8080/xmlui/handle/123456789/9447
Title: Gapless quantum spin liquid in the 𝑆=1 4𝑑4 honeycomb material Cu3⁒LiRu2⁒O6
Authors: Bachhar, Sanjay
PISTAWALA, NASHRA
Kundu, S
Barik, Maneesha
Baenitz, M.
Sichelschmidt, JΓΆrg
Yokoyama, Koji
Khuntia, P.
SINGH, SURJEET
Mahajan, A. V.
Dept. of Physics
Keywords: Quantum spin liqu
Specific heat
Nuclear magnetic resonance
2025-MAR-WEEK1
TOC-MAR-2025
2025
Issue Date: Mar-2025
Publisher: American Physical Society
Citation: Physical Review B, 111, L10040.
Abstract: We report on a novel gapless quantum spin liquid in the 𝑆=1 honeycomb system Cu3⁒LiRu2⁒O6 with Ru4+ (4⁒𝑑4) where moments remain dynamic down to 50 mK. Heat capacity measurements show no sign of magnetic ordering down to 60 mK inspite of a Curie-Weiss temperature, πœƒCW=βˆ’222 K, indicating a strong antiferromagnetic interaction. In zero field, the magnetic heat capacity πΆπ‘š shows a linear 𝑇 dependence with the Sommerfeld coefficient 𝛾=107 mJ/mol K2, which is much larger than that found in typical Fermi liquids. Our local probe 7 Li nuclear magnetic resonance (NMR) measurements find a significant temperature-independent 7 Li NMR shift (and hence a nonzero spin susceptibility) at low temperature (𝑇) and a linear 𝑇 variation of the 7 Li NMR spin-lattice relaxation rate 1/𝑇1 at low 𝑇 reminiscent of fermionic excitations. Muon spin relaxation (πœ‡β’SR) measurements detect neither long-range ordering nor spin freezing down to 50 mK, and the temperature variation of the muon depolarization rate πœ† shows a gradual increase with decreasing temperature and a leveling off below about 1 K, evincing a persistent spin dynamics common to several spin liquid candidates. Our results provide strong signatures of a quantum spin liquid in the titled honeycomb material.
URI: https://doi.org/10.1103/PhysRevB.111.L100403
http://dr.iiserpune.ac.in:8080/xmlui/handle/123456789/9447
ISSN: 2469-9969
2469-9950
Appears in Collections:JOURNAL ARTICLES

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