U(1) Gauge Theory of the Hubbard Model: Spin Liquid States and Possible Application to κ(BEDTTTF)2Cu2(CN)3

Sung-Sik Lee and Patrick A. Lee
Phys. Rev. Lett. 95, 036403 – Published 15 July 2005

Abstract

We formulate a U(1) gauge theory of the Hubbard model in the slave-rotor representation. From this formalism it is argued that spin liquid phases may exist near the Mott transition in the Hubbard model on triangular and honeycomb lattices at half filling. The organic compound κ(BEDTTTF)2Cu2(CN)3 is a good candidate for the spin liquid state on a triangular lattice. We predict a highly unusual temperature dependence for the thermal conductivity of this material.

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  • Received 10 February 2005

DOI:https://doi.org/10.1103/PhysRevLett.95.036403

©2005 American Physical Society

Authors & Affiliations

Sung-Sik Lee and Patrick A. Lee

  • Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA

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Issue

Vol. 95, Iss. 3 — 15 July 2005

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