| Autor: |
Kendal W. Clark, X.-G. Zhang, Gong Gu, Jewook Park, Guowei He, R. M. Feenstra, An-Ping Li |
| Jazyk: |
angličtina |
| Rok vydání: |
2014 |
| Předmět: |
|
| Zdroj: |
Physical Review X, Vol 4, Iss 1, p 011021 (2014) |
| Druh dokumentu: |
article |
| ISSN: |
2160-3308 |
| DOI: |
10.1103/PhysRevX.4.011021 |
| Popis: |
We show that Friedel charge oscillation near an interface opens a gap at the Fermi energy for electrons with wave vectors perpendicular to the interface. If the Friedel gaps on two sides of the interface are different, a nonequilibrium effect—shifting of these gaps under bias—leads to asymmetric transport upon reversing the bias polarity. The predicted transport asymmetry is revealed by scanning tunneling potentiometry at monolayer-bilayer interfaces in epitaxial graphene on SiC(0001). This intriguing interfacial transport behavior opens a new avenue toward novel quantum functions such as quantum switching. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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