Experimental demonstration of a Fermi surface at one-half filling of the lowest Landau level

R. L. Willett, R. R. Ruel, K. W. West, L. N. Pfeiffer

Research output: Contribution to journalArticlepeer-review

395 Scopus citations

Abstract

We report the first direct observation of the cyclotron motion of new quasiparticles in a 2D electron system near 1/2 filling factor. Just as electrons in a metal geometrically resonate with a sound wave when a magnetic field is applied perpendicular to the sound propagation direction, near 1/2 filling factor we observe resonance of a surface sound wave with cyclotron orbits of charge carriers. The presence of a Fermi surface and geometric resonance of a sound wave with Chern-Simons gauge transformed fermions were explicitly predicted in a recent theory of the half filled Landau level.

Original languageEnglish (US)
Pages (from-to)3846-3849
Number of pages4
JournalPhysical review letters
Volume71
Issue number23
DOIs
StatePublished - 1993
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy

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