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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 1:57 |
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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. Sánchez, R. López, 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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