Sinkovicz, P. and Zamora, A. and Szirmai, E. and Lewenstein, M. and Szirmai, G. (2013) Spin liquid phases of alkaline earth atoms at finite temperature. PHYSICAL REVIEW A (7). pp. 113. ISSN 10502947

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Abstract
We study spin liquid phases of spin5/2 alkaline earth atoms on a honeycomb lattice at finite temperatures. Our analysis is based on a Gutzwiller projection variational approach recast to a pathintegral formalism. In the framework of a saddlepoint approximation we determine spin liquid phases with lowest free energy and study their temperature dependence. We identify a critical temperature, where all the spin liquid phases melt and the system goes to the paramagnetic phase. We also study the stability of the saddlepoint solutions and show that a timereversal symmetry breaking state, a so called chiral spin liquid phase is realized even at finite temperatures. We also determine the spin structure factor, which, in principle, is an experimentally measurable quantity and is the basic tool to map the spectrum of elementary excitations of the system.
Item Type:  Article 

Subjects:  Q Science / természettudomány > QC Physics / fizika > QC06 Physics of condensed matter / szilárdtestfizika 
Depositing User:  Mária Kokol 
Date Deposited:  27 Mar 2014 10:27 
Last Modified:  27 Mar 2014 13:59 
URI:  http://real.mtak.hu/id/eprint/11177 
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