The t-J Model in a Strong Magnetic Field

• Authors: A. Sherman
• Languages of publication: EN

Abstracts

EN

The normal-state energy spectrum of the two-dimensional t-J model in a homogeneous perpendicular magnetic field B is investigated using the Mori projection operator technique. The density of states at the Fermi level as a function of 1/B reveals both high- and low-frequency oscillations. The high-frequency oscillations correspond to large Fermi surfaces, while the low-frequency components are related to van Hove singularities in the Landau subbands, which stem from their bending due to strong electron correlations. Frequencies of the low-frequency components are of the same order of magnitude as those observed in underdoped cuprates. These components become dominant if smoothing processes are involved. It is shown that despite increased distances between subbands the pseudogap affects only slightly the frequency of density of states oscillations.

Keywords

EN

71.10.Fd; 71.27.+a; 71.70.Di; 74.72.Gh

Discipline

• 71.70.Di: Landau levels
• 74.72.Gh: Hole-doped
• 71.27.+a: Strongly correlated electron systems; heavy fermions
• 71.10.Fd: Lattice fermion models (Hubbard model, etc.)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2015
• Volume: 127
• Issue: 2
• Pages: 213-215

Dates

published

2015-02

Contributors

author

A. Sherman

• Institute of Physics, University of Tartu, Riia 142, 51014 Tartu, Estonia

References

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• [7] A. Sherman, M. Schreiber, J. Supercond. Nov. Magn. 25, 1833 (2012), doi: 10.1007/s10948-012-1573-6

Identifiers

DOI

10.12693/APhysPolA.127.213