| Issue |
EPL
Volume 93, Number 6, March 2011
|
|
|---|---|---|
| Article Number | 67003 | |
| Number of page(s) | 6 | |
| Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
| DOI | https://doi.org/10.1209/0295-5075/93/67003 | |
| Published online | 17 March 2011 | |
Crossover of thermal to shot noise in chaotic cavities
1
EAD-Física, Universidade Federal Rural de Pernambuco - 52171-900 Recife, PE, Brazil
2
Departamento de Física, Universidade Federal da Paraíba - 58051-900 João Pessoa, PB, Brazil
Received:
1
September
2010
Accepted:
20
February
2011
We study the crossover between thermal and shot-noise power in a chaotic quantum dot in the presence of non-ideal contacts at finite temperature. The result explicitly demonstrates that the temperature affects the suppression-amplification effect present in the main quantum noise. In particular, the weak-localization contribution to the noise has an anomalous thermal behavior when one let the barriers vary, indicating the presence of a critical point related to a specific value of the tunneling barriers. We also show how to get to the opaque limit of the quantum dot at finite temperature.
PACS: 73.23.-b – Electronic transport in mesoscopic systems
© EPLA, 2011
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