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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2025-04-08 8:08 |
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Conference: Bucharest University Faculty of Physics 2015 Meeting
Section: Solid State Physics and Materials Science
Title:
Nonlinear thermoelectric effects in nanostructured quantum wires
Authors:
Anda Elena STANCIU (1) , George Alexandru NEMNES (1), A. MANOLESCU (2)
Affiliation:
(1) University of Bucharest, Faculty of Physics Magurele-Ilfov, Romania
(2) School of Science and Engineering, Reykjavik University,
Menntavegur 1, IS-101 Reykjavik, Iceland
E-mail
stanciu_anda@yahoo.com
Keywords:
thermoelectrics, non-linear temperature regime, R-matrix
Abstract:
Thermoelectric effects in different nanostructured systems ( i.e. quantum dots, quantum wires or a quantum point contact ) are studied using a scattering formalism based on the R-matrix method. We consider a temperature gradient between the contacts, which goes beyond the linear regime. Sign changes of the thermopower are registered as the chemical potential is varied around a resonance and in-between resonances. The dependence of the thermoelectric voltage on the coupling strength and on the thermoelectric fields arising between contacts is presented. The thermoelectric response given by the spin-orbit interaction and by the different orientations of the magnetic field with respect to the transport direction is also discussed.
References:
1. J. G. Gluschke et al Nanotechnology 25 385704 (2014).
2. Yong Xu, Zhongxue Gan, Shou-Cheng Zhang Phys. Rev. Lett. 112, 226801 (2014).
3. S. Fahlvik Svensson et al., New J. Phys. 15 105011 (2013).
4. D. S�nchez, R. L�pez, Phys. Rev. Lett. 110, 026804 (2013).
5. G. A. Nemnes, A. Manolescu, V. Gudmundsson, J. Phys.: Conf. Ser. 338, 012012 (2012).
G. A. Nemnes, L. Ion, S. Antohe, J. Appl. Phys. 106, 113714 (2009).
Acknowledgement:
Financial support of the EEA Financial Mechanism 2009-2014 staff mobility grant
and the hospitality of Reykjavik University are gratefully acknowledged.
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