Abstract
We report effective mass (m*) measurements, via analyzing the temperature dependence of the Shubnikov-de Haas oscillations, for dilute, interacting, two-dimensional electron systems (2DESs) occupying a single conduction-band valley in AlAs quantum wells. When the 2DES is partially spin-polarized, m* is larger than its band value, consistent with previous results on various 2DESs. However, as we fully spin-polarize the 2DES by subjecting it to strong parallel magnetic fields, m* is unexpectedly suppressed and falls even below the band mass.
| Original language | English (US) |
|---|---|
| Article number | 026402 |
| Journal | Physical review letters |
| Volume | 101 |
| Issue number | 2 |
| DOIs | |
| State | Published - Jul 7 2008 |
All Science Journal Classification (ASJC) codes
- General Physics and Astronomy
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