New non-Fermi-liquid-type behaviour by a two-band system in normal phase

Z. Gulácsi, Ivan Orlik

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

We are reporting a new non-Fermi-liquid-type normal phase that has a well defined Fermi energy, but without showing any non-regularity in the momentum distribution function nk in the whole momentum space, the sharp Fermi momentum concept being undefinable. The system contains a natural built-in gap that is visible in the physical properties of the system at nonzero temperatures. The presence of a flat band in multi-band interacting Fermi systems with more than half filling is the key feature leading to such a ground state, which is not restricted to one spatial dimension and emerges in the proximity of an insulating phase.

Original languageEnglish
JournalJournal of Physics A: Mathematical and General
Volume34
Issue number24
DOIs
Publication statusPublished - Jun 22 2001

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Momentum
Liquid
momentum
Liquids
liquids
Fermi level
Physical property
Ground state
Proximity
Distribution functions
Ground State
Well-defined
proximity
Distribution Function
Physical properties
physical properties
distribution functions
ground state
Energy
Temperature

ASJC Scopus subject areas

  • Mathematical Physics
  • Physics and Astronomy(all)
  • Statistical and Nonlinear Physics

Cite this

New non-Fermi-liquid-type behaviour by a two-band system in normal phase. / Gulácsi, Z.; Orlik, Ivan.

In: Journal of Physics A: Mathematical and General, Vol. 34, No. 24, 22.06.2001.

Research output: Contribution to journalArticle

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