Volume 97, Number 5, March 2012
|Number of page(s)||6|
|Section||Condensed Matter: Structural, Mechanical and Thermal Properties|
|Published online||01 March 2012|
Identification of strongly correlated spin liquid in herbertsmithite
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 Opole University, Institute of Physics - Opole, 45-052, Poland, EU
Accepted: 27 January 2012
An exotic quantum spin liquid (QSL) is formed with such hypothetic particles as fermionic spinons carrying spin 1/2 and no charge. Here we calculate its thermodynamic and relaxation properties. Our calculations unveil the fundamental properties of QSL, forming a strongly correlated Fermi system located at a fermion condensation quantum phase transition. These are in good agreement with experimental data and allow us to detect the behavior of QSL as that observed in heavy-fermion metals. We predict that the thermal resistivity of QSL under the application of magnetic fields at fixed temperature demonstrates a very specific behavior. The key features of our findings are the presence of spin-charge separation and QSL formed with itinerant heavy spinons in herbertsmithite.
PACS: 64.70.Tg – Quantum phase transitions / 75.40.Gb – Dynamic properties (dynamic susceptibility, spin waves, spin diffusion, dynamic scaling, etc.) / 71.10.Hf – Non-Fermi-liquid ground states, electron phase diagrams and phase transitions in model systems
© EPLA, 2012
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