| Autor: |
Raymond Ashoori, Bigelow Np, Lebens Ja, Robert H. Silsbee |
| Rok vydání: |
1993 |
| Předmět: |
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| Zdroj: |
Physical review. B, Condensed matter. 48(7) |
| ISSN: |
0163-1829 |
| Popis: |
We detail our results revealing a new energy gap present in the two-dimensional electron gas (2DEG). The gap, seen in the tunneling spectrum of electrons in the 2DEG, develops only in the presence of a magnetic beld applied perpendicular to the 2DEG plane. The experiments discussed here consist of measurements of electron tunneling between a 2DEG in a quantum well and an n + substrate using excitation voltages less than k B T/e. At low temperatures and only with the magnetic field applied perpendicular to the plane of the electron gas in the well, the tunneling rate develops an unusual temperature-dependent suppression. The suppression strength is roughly independent of Landau-level filling for densities 0.5×10 11 cm -2 to 6×10 11 cm -2 |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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