Rectification in mesoscopic systems with broken symmetry: quasiclassical ballistic versus classical transport.
Phys Rev Lett
; 92(5): 056806, 2004 Feb 06.
Article
de En
| MEDLINE
| ID: mdl-14995331
ABSTRACT
In suitably designed mesoscopic semiconductor structures, the phenomenon of ballistic rectification can be observed. A currently discussed microscopic model relates the observations to the interplay between fully quantized and quasiclassical current paths. We present measurements that contribute substantially to the clarification of the fascinating topic. In particular, we observe the opposite sign of the output voltage as compared to the prediction. Demonstrating the basic principle upon which the rectification is based--the asymmetry of the voltage drop in a quasiclassical wire--and extending the model to the classical transport regime, we can well explain our experiments as being caused by the interplay of quasiclassical ballistic and classical transport. Tunable ballistic rectifiers generating very large output signals and operating at room temperature raise the hope for future applications.
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Collection:
01-internacional
Base de données:
MEDLINE
Type d'étude:
Prognostic_studies
Langue:
En
Journal:
Phys Rev Lett
Année:
2004
Type de document:
Article
Pays d'affiliation:
Allemagne