Charge-spin excitations of the Ising-type fractional quantum Hall ferromagnets

被引：3

作者：

Vyborny, Karel ^{[1
]}

Dethlefsen, Annelene F. ^{[2
,3
]}

Haug, Rolf J. ^{[2
]}

Wojs, Arkadiusz ^{[4
,5
]}

机构：

[1] Akad Ceske Republ, Fyzikalni Ustav, CZ-16253 Prague 6, Czech Republic

[2] Leibniz Univ Hannover, Inst Festkorperphys, D-30167 Hannover, Germany

[3] Solar Syst Pty Ltd, Abbotsford, Vic 3067, Australia

[4] Wroclaw Univ Technol, Inst Fizyki, PL-50370 Wroclaw, Poland

[5] Univ Cambridge, Cavendish Lab, TCM Grp, Cambridge CB3 0HE, England

来源：

PHYSICAL REVIEW B | 2009年 / 80卷 / 04期

关键词：

2-DIMENSIONAL ELECTRON-GAS; REVERSED QUASI-PARTICLES; FILLED LANDAU-LEVEL; COMPOSITE FERMIONS; FINITE-SIZE; COLLECTIVE EXCITATIONS; PHASE-TRANSITION; MAGNETIC-FIELD; SKYRMIONS; SYSTEMS;

D O I：

10.1103/PhysRevB.80.045407

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We study the low-lying excitations from the fractional quantum Hall states at filling factors 2/3 and 2/5 and argue that the charge-carrying excitations involve spin flips, and, in particular, possibly more than one. Energies obtained by exact diagonalization and transport activation gaps measured over a wide range of magnetic fields are invoked. We discuss the relevance of the noninteracting composite-fermion picture where both fractions correspond to the same filling factor 2 of the composite fermions.

引用

页数：13

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