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Evidence for Skyrmions and single spin flips in the integer quantized Hall effect

Schmeller, A. and Eisenstein, J. P. and Pfeiffer, L. N. and West, K. W. (1995) Evidence for Skyrmions and single spin flips in the integer quantized Hall effect. Physical Review Letters, 75 (23). pp. 4290-4293. ISSN 0031-9007. doi:10.1103/PhysRevLett.75.4290.

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We have employed tilted-field magnetotransport measurements of the energy gap for the odd-integer quantized Hall states at Landau level filling factors ν=1, 3, and 5 to determine the spin of thermally excited quasielectron-quasihole pairs. At ν=1 our data show that as many as 7 electron spin flips accompany such excitations, while at ν=3 and 5 apparently only a single spin flips. These results lend support to the recent suggestions that "Skyrmionic" quasiparticles are the lowest-lying charged excitations of the fully polarized ν=1 quantum Hall fluid but are not at the higher odd-integer fillings.

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Additional Information:© 1995 The American Physical Society. Received 29 June 1995. It is a pleasure to thank Luis Brey, Song He, Allan MacDonald, Shivaji Sondhi, and Pär Omling for useful discussions. We also thank Song He for performing informative small system exact diagonalization calculations at our request.
Issue or Number:23
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:7491
Deposited By: Tony Diaz
Deposited On:28 Feb 2007
Last Modified:08 Nov 2021 20:43

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