Spinless Fermionic ladders in a magnetic field: Phase Diagram

Details Spinless Fermionic ladders in a magnetic field: Phase Diagram Spinless Fermionic ladders in a magnetic field: Phase Diagram

2006-01-09

arxiv.org/abs/cond-mat/0601164v1

Phys. Rev. B 73, 195114 (2006)

Physics

Condensed Matter

Strongly Correlated Electrons

16 pages, 6 figures

Scientific paper

10.1103/PhysRevB.73.195114

The system of interacting spinless fermions hopping on a two-leg ladder
exhibits a series of quantum phase transitions when subjected to an external
magnetic field. At half filling, these are either U(1) Gaussian phase
transitions between two phases with distinct types of long-range order or
Berezinskii-Kosterlitz-Thouless transitions between ordered and gapless phases.

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