COMPOSITE-FERMION EXCITATIONS AND THE ELECTRONIC-SPECTRA OF FRACTIONAL QUANTUM HALL SYSTEMS

Citation
Sn. Yi et al., COMPOSITE-FERMION EXCITATIONS AND THE ELECTRONIC-SPECTRA OF FRACTIONAL QUANTUM HALL SYSTEMS, Physical review. B, Condensed matter, 53(15), 1996, pp. 9599-9601
Citations number
20
Categorie Soggetti
Physics, Condensed Matter
ISSN journal
01631829
Volume
53
Issue
15
Year of publication
1996
Pages
9599 - 9601
Database
ISI
SICI code
0163-1829(1996)53:15<9599:CEATEO>2.0.ZU;2-W
Abstract
In the composite-fernion (CF) mean-field theory of a two-dimensional e lectron system, an electron Landau level whose filling factor is an od d denominator fraction can be transformed into an integral number of f illed CF Landau levels. This CF state corresponds to the ground state of a Laughlin incompressible liquid, with an energy gap equal to the ' 'effective'' CF cyclotron energy. Excited states are described by n(QE ) and n(QH), the number of quasielectron and quasihole CF excitations. The energies of individual quasielectrons or quasiholes and their ''F ermi liquid'' interactions can be investigated by comparing the CF pic ture with exact numerical results for a small number of electrons on a spherical surface.