Volume 103, Number 6, September 2013
|Number of page(s)||6|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|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
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.