24,307 research outputs found
Composite Fermions with Spin Freedom
General rule for the composite fermion transformation, when the spins of the
electrons are not polarized is derived. Condition for the quantum phase
transition between various spin states is obtained based on the rule. This rule
gives foundation for the experimental determination of the mass and -factor
of the composite fermion.Comment: 5 pages with 1 ps figure, Revtex, to be published in J. Phys. Soc.
Jpn. Vol.68 No.10. Misprints are correcte
Tomonaga-Luttinger-Liquid Theory of Metallic Carbon Nanotubes with Open Boundaries
Tomonaga-Luttinger-liquid theory is formulated for metallic carbon nanotubes
with open boundaries. Both cases of single- and multi-wall nanotubes are
discussed. Based on this theory, spatial variation of the charge density from
an edge is investigated with taking account of the shift of the chemical
potential which expresses the carrier injection to the nanotube. The charge
density has the spatially independent part and the oscillatory component. Roles
of Coulomb interaction on the amplitude of the oscillation, the wavenumbers of
it and the uniform component of the charge density are clarified.Comment: 14 pages, 4 figures, to be published in J. Phys. Soc. Jpn. Vol. 71
(2002) No.1
Edge State Transport of Separately Contacted Bilayer Systems in the Fractional Quantum Hall Regime
Hall and diagonal resistances of bilayer fractional quantum Hall systems are
discussed theoretically. The bilayers have electrodes attached separately to
each layer. They are assumed to be coupled weakly by interlayer tunneling,
while the interlayer Coulomb interaction is negligibly small. It is shown that
source-drain voltage dependence of the resistances reflects the Luttinger
liquid parameter of the edge state.Comment: 3 pages with 2 eps figure, Revtex, contributed paper to EP2DS-1
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