Drastic enhancement of composite fermion mass near landau level filling ν=12

R. R. Du, H. L. Stormer, D. C. Tsui, A. S. Yeh, L. N. Pfeiffer, K. W. West

Research output: Contribution to journalArticlepeer-review

133 Scopus citations

Abstract

We have determined the effective mass of composite fermions in the vicinity of half Landau level filling and observe a mass enhancement by as much as 40% as the filling factor ν approaches ν=12. These measurements provide the first experimental data for the energetics of this novel fermion system as ν→12. The apparently divergent particle mass indicates that the system at exactly ν=12 is not an ordinary Fermi liquid.

Original languageEnglish (US)
Pages (from-to)3274-3277
Number of pages4
JournalPhysical review letters
Volume73
Issue number24
DOIs
StatePublished - 1994
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy

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