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26 April 2024 |
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Large Skyrmions in an Al(0.13)Ga(0.87)As Quantum Well | | S. P. Shukla
; M. Shayegan
; S. R. Parihar
; S. A. Lyon
; N. R. Cooper
; A. A. Kiselev
; | | Date: |
30 Aug 1999 | | Subject: | Mesoscopic Systems and Quantum Hall Effect | cond-mat.mes-hall | | Affiliation: | Department of Electrical Engineering, Princeton University, Princeton, USA, School of Physics and Astronomy, University of Birmingham, Edgbaston, UK, Department of Electrical and Computer Engineering, North Carolina State University, Raleigh, USA | | Abstract: | We report tilted-field magnetotransport measurements of two-dimensional electron systems in a 200 Angstrom-wide Al(0.13)Ga(0.87)As quantum well. We extract the energy gap for the quantum Hall state at Landau level filling
u =1 as a function of the tilt angle. The relatively small effective Lande g-factor (g ~ 0.043) of the structure leads to skyrmionic excitations composed of the largest number of spins yet reported (s ~ 50). Although consistent with the skyrmion size observed, Hartree-Fock calculations, even after corrections, significantly overestimate the energy gaps over the entire range of our data. | | Source: | arXiv, cond-mat/9908452 | | Services: | Forum | Review | PDF | Favorites | |
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