Hot-electron spectrometry with quantum point contacts
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چکیده
منابع مشابه
Electron-phonon scattering in quantum point contacts.
We study the negative correction to the quantized value 2e(2)/h of the conductance of a quantum point contact due to the backscattering of electrons by acoustic phonons. The correction shows activated temperature dependence and also gives rise to a zero-bias anomaly in conductance. Our results are in qualitative agreement with recent experiments studying the 0.7 feature in the conductance of qu...
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We consider electron–electron interaction effects in quantum point contacts on the first quantization plateau, taking into account all scattering processes. We compute the low-temperature linear and nonlinear conductance, shot noise and thermopower, by perturbation theory and a self-consistent nonperturbative method. On the conductance plateau, the low-temperature corrections are solely due to ...
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An unusual increase of the conductance with temperature is observed in clean quantum point contacts for conductances larger than 2(e2/h). At the same time, a positive magnetoresistance arises at high temperatures. A model accounting for electron-electron interactions mediated by boundaries (scattering on Friedel oscillations) qualitatively describes the observation. It is supported by a numeric...
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Rights: © 2004 American Physical Society (APS). This is the accepted version of the following article: Havu, P. & Puska, M. J. & Nieminen, Risto M. & Havu, V. 2004. Electron transport through quantum wires and point contacts. Physical Review B. Volume 70, Issue 23. 233308/1-4. ISSN 1550-235X (electronic). DOI: 10.1103/physrevb.70.233308, which has been published in final form at http://journals...
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Alessandro Cresti , Giuseppe Grosso (2) and Giuseppe Pastori Parravicini (3) (1) NEST-INFM, Scuola Normale Superiore, Piazza dei Cavalieri 7, I-56126 Pisa, Italy, and Dipartimento di Fisica E. Fermi, Largo B. Pontecorvo 3, I-56127 Pisa, Italy [email protected] (2) NEST-INFM and Dipartimento di Fisica E. Fermi, Largo B. Pontecorvo 3, I-56127 Pisa, Italy (3) NEST-INFM and Dipartimento di Fisica ...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 1990
ISSN: 0163-1829,1095-3795
DOI: 10.1103/physrevb.41.1207