Fractional Quantum Hall Effect Measurements at Zero g-Factor

Дата и время публикации : 1997-06-16T12:09:17Z

Авторы публикации и институты :
D. R. Leadley
R. J. Nicholas
D. K. Maude
A. N. Utjuzh
J. C. Portal
J. J. Harris
C. T. Foxon

Ссылка на журнал-издание: Ссылка на журнал-издание не найдена
Коментарии к cтатье: 7 pages retex + 4 ps figs
Первичная категория: cond-mat.mes-hall

Все категории : cond-mat.mes-hall

Краткий обзор статьи: Fractional quantum Hall effect energy gaps have been measured in GaAs/GaAlAs heterojunctions as a function of Zeeman energy, which is varied by applying hydrostatic pressure up to 20 kbar. The gap at v=1/3 decreases with pressure until the g-factor changes sign when it again increases. The behavior is similar to that seen at v=1 and shows that excitations from the 1/3 ground state can be spin-like in character. At small Zeeman energy, the excitation appears to consist of 3 spins and may be interpreted as a small composite skyrmion.

Category: Physics