Issue |
EPL
Volume 103, Number 6, September 2013
|
|
---|---|---|
Article Number | 67006 | |
Number of page(s) | 6 | |
Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
DOI | https://doi.org/10.1209/0295-5075/103/67006 | |
Published online | 22 October 2013 |
Heat transport in magnetic fields by quantum spin liquid in the organic insulators EtMe3Sb[Pd(dmit)2]2 and κ-(BEDT - TTF)2Cu2(CN)3
1 Petersburg Nuclear Physics Institute - Gatchina, 188300, Russia
2 Clark Atlanta University - Atlanta, GA 30314, USA
3 Komi Science Center, Ural Division, RAS - Syktyvkar, 167982, Russia
4 Russian Research Center Kurchatov Institute - Moscow, 123182, Russia
5 McDonnell Center for the Space Sciences and Department of Physics, Washington University St. Louis, MO 63130, USA
Received: 11 September 2013
Accepted: 25 September 2013
Measurements of the low-temperature thermal conductivity collected on insulators with geometrical frustration produce important experimental facts shedding light on the nature of quantum spin liquid composed of spinons. We employ a model of strongly correlated quantum spin liquid located near the fermion condensation phase transition to analyze the exciting measurements of the low-temperature thermal conductivity in magnetic fields collected on the organic insulators and
. Our analysis of the conductivity allows us to reveal a strong dependence of the effective mass of spinons on magnetic fields, to detect a scaling behavior of the conductivity, and to relate it to both the spin-lattice relaxation rate and the magnetoresistivity. Our calculations and observations are in a good agreement with experimental data.
PACS: 75.10.Kt – Quantum spin liquids, valence bond phases and related phenomena / 66.25.+g – Thermal conduction in nonmetallic liquids / 71.10.Hf – Non-Fermi-liquid ground states, electron phase diagrams and phase transitions in model systems
© EPLA, 2013
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