Spin Bose-metal phase in a spin-12model with ring exchange on a two-leg triangular strip
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چکیده
منابع مشابه
Spin Bose - metal phase in a spin - 12 model with ring exchange on a two - leg triangular strip
Recent experiments on triangular lattice organic Mott insulators have found evidence for a two-dimensional 2D spin liquid in close proximity to the metal-insulator transition. A Gutzwiller wave function study of the triangular lattice Heisenberg model with a four-spin ring exchange term appropriate in this regime has found that the projected spinon Fermi sea state has a low variational energy. ...
متن کاملEffects of impurities in spin Bose-metal phase on a two-leg triangular strip
We study the effects of nonmagnetic impurities in a spin Bose-metal SBM phase discovered in a two-leg triangular strip spin-1/2 model with ring exchanges D. N. Sheng et al., arXiv:0902.4210 . This phase is a quasi-one-dimensional quasi-1D descendant of a two-dimensional 2D spin liquid with spinon Fermi sea and the present study aims at interpolating between the 1D and 2D cases. Different types ...
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 کاملSpin Bose-metal and valence bond solid phases in a spin-1/2 model with ring exchanges on a four-leg triangular ladder.
We study a spin-1/2 system with Heisenberg plus ring exchanges on a four-leg triangular ladder using the density matrix renormalization group and Gutzwiller variational wave functions. Near an isotropic lattice regime, for moderate to large ring exchanges we find a spin Bose-metal phase with a spinon Fermi sea consisting of three partially filled bands. Going away from the triangular towards th...
متن کاملEffects of Zeeman field on a spin Bose-metal phase
We consider Zeeman field effects on a spin Bose-metal SBM phase on a two-leg triangular ladder. This phase was found in a spin-1/2 model with ring exchanges D. N. Sheng, O. I. Motrunich, and M. P. A. Fisher, Phys. Rev. B 79, 205112 2009 and was also proposed to appear in an interacting electronic model with longer-ranged repulsion H.-H. Lai and O. I. Motrunich, Phys. Rev. B 81, 045105 2010 . Us...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 2009
ISSN: 1098-0121,1550-235X
DOI: 10.1103/physrevb.79.205112