Bloch Electron on a Triangular Lattice and Quantum Ising Model in a Transverse Field

Details Bloch Electron on a Triangular Lattice and Quantum Ising Model in a Transverse Field Bloch Electron on a Triangular Lattice and Quantum Ising Model in a Transverse Field

1995-07-12

arxiv.org/abs/cond-mat/9507036v1

Physics

Condensed Matter

4 pages, RevTeX, 3 figures included

Scientific paper

The tight binding model for an electron on an anisotropic triangular lattice in a uniform magnetic field is studied using a decimation scheme. The model exhibits a transition from critical to localized phase and the phase diagram is described in terms of three nontrivial renormalization fixed points for the band edges. These subcritical, critical, and supercritical universality classes also describe the corresponding states of the quantum Ising chain in a modulating transverse field. The only exception is the conformally invariant point of the Ising model which has no analog in the electron problem.

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