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Coulomb Gaps in One-Dimensional Spin-Polarized Electron Systems

Gun Sang Jeon·M. Y. Choi·S. -R. Eric Yang
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Abstract

We investigate the density of states (DOS) near the Fermi energy of one-dimensional spin-polarized electron systems in the quantum regime where the localization length is comparable to or larger than the inter-particle distance. The Wigner lattice gap of such a system, in the presence of weak disorder, can occur precisely at the Fermi energy, coinciding with the Coulomb gap in position. The interplay between the two is investigated by treating the long-range Coulomb interaction and the random disorder potential in a self-consistent Hartree-Fock approximation. The DOS near the Fermi energy is found to be well described by a power law whose exponent decreases with increasing disorder strength.

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Gun Sang Jeon, M. Y. Choi, S. -R. Eric Yang. 1996-08-12. Coulomb Gaps in One-Dimensional Spin-Polarized Electron Systems. https://doi.org/10.1103/physrevb.54.r8341

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