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Автор D R Leadley
Автор R J Nicholas
Автор D K Maude
Автор A N Utjuzh
Автор J C Portal
Автор J J Harris
Автор C T Foxon
Дата выпуска 1998-07-01
dc.description Energy gaps have been measured for the ferromagnetic quantum Hall effect states at and 3 in heterojunctions as a function of Zeeman energy, which is reduced to zero by applying hydrostatic pressures of up to 20 kbar. At large Zeeman energy the gaps are consistent with spin-wave excitations. For a low-density sample the gap at decreases with increasing pressure and reaches a minimum when the g-factor vanishes. At small Zeeman energy the excitation appears to consist of a large number of reversed spins and may be interpreted as a skyrmion. The data also suggest that skyrmionic excitations take place at . The width of the minimum at is found to decrease as the g-factor is reduced in a similar way for all samples.
Формат application.pdf
Издатель Institute of Physics Publishing
Название Searches for skyrmions in the limit of zero -factor
Тип paper
DOI 10.1088/0268-1242/13/7/004
Electronic ISSN 1361-6641
Print ISSN 0268-1242
Журнал Semiconductor Science and Technology
Том 13
Первая страница 671
Последняя страница 679
Выпуск 7

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