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Searches for skyrmions in the limit of zero g-factor
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UNSPECIFIED (1998) Searches for skyrmions in the limit of zero g-factor. SEMICONDUCTOR SCIENCE AND TECHNOLOGY, 13 (7). pp. 671-679. ISSN 0268-1242.
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Abstract
Energy gaps have been measured for the ferromagnetic quantum Hall effect states at v =1 and 3 in GaAs/Ga0.7Al0.3As 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 v = 1 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 v = 3. The width of the minimum at v = 1 is found to decrease as the g-factor is reduced in a similar way for all samples.
Item Type: | Journal Article | ||||
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Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering T Technology > TA Engineering (General). Civil engineering (General) Q Science > QC Physics |
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Journal or Publication Title: | SEMICONDUCTOR SCIENCE AND TECHNOLOGY | ||||
Publisher: | IOP PUBLISHING LTD | ||||
ISSN: | 0268-1242 | ||||
Official Date: | July 1998 | ||||
Dates: |
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Volume: | 13 | ||||
Number: | 7 | ||||
Number of Pages: | 9 | ||||
Page Range: | pp. 671-679 | ||||
Publication Status: | Published |
Data sourced from Thomson Reuters' Web of Knowledge
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