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Phys. Rev. B 70, 220505(R) (2004) [4 pages]

Current carrying ground state in a bilayer model of strongly correlated systems

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Sylvain Capponi
Laboratoire de Physique Théorique UMR 5152, Université Paul Sabatier, 118 route de Narbonne, 31062 Toulouse, France and Department of Physics, McCullough Building, Stanford University, Stanford, California 94305-4045, USA

Congjun Wu and Shou-Cheng Zhang
Department of Physics, McCullough Building, Stanford University, Stanford, California 94305-4045, USA

Received 12 October 2004; published 21 December 2004

Strongly interacting systems have been conjectured to spontaneously develop current carrying ground states under certain conditions. We demonstrate the existence of a commensurate staggered interlayer current phase in a bilayer model by using the recently discovered quantum Monte Carlo algorithm without the sign problem for fermionic systems. A pseudospin SU(2) algebra and the corresponding anisotropic spin-1 Heisenberg model are constructed to show the competition among the staggered interlayer current, rung singlet, and charge density wave phases.

© 2004 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.70.220505
DOI:
10.1103/PhysRevB.70.220505
PACS:
74.20.Mn, 71.10.Fd, 71.10.Hf, 71.30.+h
 
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