Evidence for Skyrmions and Single Spin Flips in the Integer Quantized Hall Effect

Abstract

We have employed tilted-field magneto-transport measurements of the energy gap for the odd-integer quantized Hall states at Landau level filling factors $\nu =1$,3 and 5 to determine the spin of thermally excited quasielectron-quasihole pairs. At $\nu =1$ our data show that as many as 7 electron spin flips accompany such excitations, while at $\nu =3$ 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 $\nu =1$ quantum Hall fluid but are not at the higher odd-integer fillings.

11 pages, 3 Postscript figures

References in corpus (1)

• Hund's Rule for Composite Fermions

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