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Seminars & Lectures

* TITLE

Gapless spin liquids: Stability and possible experimental relevance

* SPEAKERS

Name	Affiliation	E-mail
Hong Yao	Tsinghua University)

* HOST(Applicant)

Name	Affiliation	E-mail
Jihye Jeong		sec(at)apctp.org

* DATE / TIME

2013-07-13, 10:00 ~ 12:00 AM

* PLACE

Physics Seminar room (Science Bldg, 3-201)

* ABSTRACT

For certain crystalline systems, most notably the organic compound EtMe3Sb[Pd(dmit)2]2, experimental evidence has accumulated of an insulating state with a high density of gapless neutral excitations that produce Fermi-liquid-like power laws in thermodynamic quantities and thermal transport. This has been taken as evidence of a fractionalized spin-liquid state. In this Rapid Communication, we argue that if the experiments are taken at face value, the most promising spin-liquid candidates are a Z4 spin liquid with a spinon-Fermi surface and no broken symmetries, or a Z2 spin liquid with a spinon-Fermi surface and at least one of the following spontaneously broken: (a) time-reversal and inversion, (b) translation, or (c) certain point-group symmetries. We present a solvable model
on the triangular lattice with an (a) type Z2 spin-liquid ground state.

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