Strong-coupling phases of frustrated bosons on a two-leg ladder with ring exchange
نویسندگان
چکیده
D. N. Sheng,1 Olexei I. Motrunich,2 Simon Trebst,3 Emanuel Gull,4 and Matthew P. A. Fisher3 1Department of Physics and Astronomy, California State University, Northridge, California 91330, USA 2Department of Physics, California Institute of Technology, Pasadena, California 91125, USA 3Microsoft Research, Station Q, University of California, Santa Barbara, California 93106, USA 4Theoretische Physik, Eidgenössische Technische Hochschule Zürich, CH-8093 Zürich, Switzerland Received 7 May 2008; published 26 August 2008
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 ...
متن کاملExotic paired phases in ladders with spin-dependent hopping
Fermions in two-dimensions (2D) when subject to anisotropic spin-dependent hopping can potentially give rise to unusual paired states in unpolarized mixtures that can behave as non-Fermi liquids. One possibility is a fully paired state with a gap for fermion excitations in which the Cooper pairs remain uncondensed. Such a “Cooper-pair Bose-metal” phase would be expected to have a singular Bose-...
متن کاملDynamical spin correlation function in a frustrated two - leg spin - ladder system
Submitted for the MAR13 Meeting of The American Physical Society Dynamical spin correlation function in a frustrated two-leg spinladder system TAKANORI SUGIMOTO, MICHIYASU MORI, ASRC, Japan Atomic Energy Agency; CREST, Japan Science and Technology Agency, TAKAMI TOHYAMA, YITP, Kyoto University, SADAMICHI MAEKAWA, ASRC, Japan Atomic Energy Agency; CREST, Japan Science and Technology Agency — We ...
متن کاملLow-lying magnon excitations in integer-spin ladders and tubes
We consider low-energy excitation structures of N-leg integer-spin ladder and tube systems with an antiferromagnetic (AF) intrachain coupling and a uniform external field. The tube means the ladder with the periodic boundary condition along the interchain (rung) direction. Odd-leg AF-rung tubes have a frustration. In order to analyze all systems including frustrated tubes, we apply a field-theo...
متن کاملMagnetic Phase Diagram of Spin-1/2 Two-Leg Ladder with Four-Spin Ring Exchange
We study the spin-1/2 two-leg Heisenberg ladder with four-spin ring exchanges under a magnetic field. We introduce an exact duality transformation which is an extension of the spin-chirality duality developed previously and yields a new self-dual surface in the parameter space. We then determine the magnetic phase diagram using the numerical approaches of the density-matrix renormalization-grou...
متن کامل