Quantum Hall Ferromagnetism in InSb based Two Dimensional Electronic Systems
Abstract
We report on the observation of Ising quantum Hall ferromagnetism in two-dimensional electronic systems based in InSb/InAlSb single quantum wells. Magneto-transport experiments in tilted magnetic fields reveal the preservation of the ν=2 and ν=3 QH states over the range in tilt angles where the single particle gap is expected to collapse. Moreover, around these tilt angles, unusual resistance bumps appear, growing in size with increasing temperature and moving toward higher filling factors as the tilt angle is increased. Our findings are discussed in terms of electron-electron interactions and domain wall loop formation within QH ferromagnets.
- Publication:
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APS March Meeting Abstracts
- Pub Date:
- March 2003
- Bibcode:
- 2003APS..MARH23013C