Field-induced gap, pseudogap and new Van Hove singularity in the triangular lattice

Y. F. Wang; C. D. Gong; S. Y. Zhu

doi:10.1209/epl/i2004-10357-4

Field-induced gap, pseudogap and new Van Hove singularity in the triangular lattice

Y. F. Wang^*, C. D. Gong, S. Y. Zhu

^*Corresponding author for this work

Department of Physics

Research output: Contribution to journal › Journal article › peer-review

5 Citations (Scopus)

Abstract

We investigate the energy spectrum and the density of states (DOS) in a 2D triangular tight-binding model with hopping integrals modulated by staggered magnetic fluxes (SMFs). Three different types of SMFs are considered. The SMFs result in shifts of the original Van Hove singularity (VHS) peak in the DOS, or even generate new flux-dependent VHSs. And a gap or a pseudogap can also be generated on the original Fermi surface. The magnitude of the pseudogap or the gap and its symmetries depend on the chemical potential μ, and on the flux parameters.

Original language	English
Pages (from-to)	404-410
Number of pages	7
Journal	Europhysics Letters
Volume	69
Issue number	3
DOIs	https://doi.org/10.1209/epl/i2004-10357-4
Publication status	Published - Feb 2005

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Physics and Astronomy(all)

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abstract = "We investigate the energy spectrum and the density of states (DOS) in a 2D triangular tight-binding model with hopping integrals modulated by staggered magnetic fluxes (SMFs). Three different types of SMFs are considered. The SMFs result in shifts of the original Van Hove singularity (VHS) peak in the DOS, or even generate new flux-dependent VHSs. And a gap or a pseudogap can also be generated on the original Fermi surface. The magnitude of the pseudogap or the gap and its symmetries depend on the chemical potential μ, and on the flux parameters.",

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AU - Wang, Y. F.

AU - Gong, C. D.

AU - Zhu, S. Y.

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Y1 - 2005/2

N2 - We investigate the energy spectrum and the density of states (DOS) in a 2D triangular tight-binding model with hopping integrals modulated by staggered magnetic fluxes (SMFs). Three different types of SMFs are considered. The SMFs result in shifts of the original Van Hove singularity (VHS) peak in the DOS, or even generate new flux-dependent VHSs. And a gap or a pseudogap can also be generated on the original Fermi surface. The magnitude of the pseudogap or the gap and its symmetries depend on the chemical potential μ, and on the flux parameters.

AB - We investigate the energy spectrum and the density of states (DOS) in a 2D triangular tight-binding model with hopping integrals modulated by staggered magnetic fluxes (SMFs). Three different types of SMFs are considered. The SMFs result in shifts of the original Van Hove singularity (VHS) peak in the DOS, or even generate new flux-dependent VHSs. And a gap or a pseudogap can also be generated on the original Fermi surface. The magnitude of the pseudogap or the gap and its symmetries depend on the chemical potential μ, and on the flux parameters.

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U2 - 10.1209/epl/i2004-10357-4

DO - 10.1209/epl/i2004-10357-4

M3 - Journal article

AN - SCOPUS:13444311612

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VL - 69

SP - 404

EP - 410

JO - Europhysics Letters

JF - Europhysics Letters

IS - 3

ER -

Field-induced gap, pseudogap and new Van Hove singularity in the triangular lattice

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