Bose metals and insulators on multileg ladders with ring exchange
نویسندگان
چکیده
Ryan V. Mishmash,1 Matthew S. Block,1,2 Ribhu K. Kaul,2 D. N. Sheng,3 Olexei I. Motrunich,4 and Matthew P. A. Fisher1 1Department of Physics, University of California, Santa Barbara, California 93106, USA 2Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506, USA 3Department of Physics and Astronomy, California State University, Northridge, California 91330, USA 4Department of Physics, California Institute of Technology, Pasadena, California 91125, USA (Received 21 October 2011; revised manuscript received 5 December 2011; published 27 December 2011)
منابع مشابه
Exotic gapless mott insulators of bosons on multileg ladders.
We present evidence for an exotic gapless insulating phase of hard-core bosons on multileg ladders with a density commensurate with the number of legs. In particular, we study in detail a model of bosons moving with direct hopping and frustrating ring exchange on a 3-leg ladder at ν=1/3 filling. For sufficiently large ring exchange, the system is insulating along the ladder but has two gapless ...
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