Abstract
Tunneling measurements on 2D electron gases at high magnetic field reveal a qualitative difference between the two spin sublevels of the lowest Landau level. While the tunneling current-voltage characteristic at filling factor ν = 1 / 2 is a single peak shifted from zero bias by a Coulomb pseudogap, the spectrum at ν = 3 / 2 shows a well-resolved double peak structure. This difference is present regardless of whether ν = 1 / 2 and ν = 3 / 2 occur at the same or different magnetic fields. No analogous effect is seen at ν = 5 / 2 and 7/2 in the first excited Landau level.
Original language | English (US) |
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Pages (from-to) | 1867-1870 |
Number of pages | 4 |
Journal | Solid State Communications |
Volume | 149 |
Issue number | 43-44 |
DOIs | |
State | Published - Nov 2009 |
Externally published | Yes |
All Science Journal Classification (ASJC) codes
- General Chemistry
- Condensed Matter Physics
- Materials Chemistry
Keywords
- D. Tunneling