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 language | English (US) |
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Pages (from-to) | 3274-3277 |
Number of pages | 4 |
Journal | Physical review letters |
Volume | 73 |
Issue number | 24 |
DOIs | |
State | Published - 1994 |
Externally published | Yes |
All Science Journal Classification (ASJC) codes
- General Physics and Astronomy