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

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

1995-06-28

arxiv.org/abs/cond-mat/9506133v1

Physics

Condensed Matter

11 pages, 3 Postscript figures

Scientific paper

10.1103/PhysRevLett.75.4290

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.

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