Emission and absorption of confined and interface optical phonons by electrons in the non-linear transport regime of a parabolic quantum wire

1998 ◽  
Vol 10 (17) ◽  
pp. 3743-3753
Author(s):  
X F Wang ◽  
I C da Cunha Lima ◽  
X L Lei
Keyword(s):  
Quantum Wire ◽  
Optical Phonons ◽  
Linear Transport ◽  
Transport Regime ◽  
Non Linear

Spin Blockade in Non-linear Transport through Quantum Dots

1994 ◽  
Vol 26 (6) ◽  
pp. 467-472 ◽  
Author(s):  
D Weinmann ◽  
W Häusler ◽  
W Pfaff ◽  
B Kramer ◽  
U Weiss
Keyword(s):  
Quantum Dots ◽  
Linear Transport ◽  
Non Linear ◽  
Spin Blockade

Non-linear transport properties of the PbTeGeTe system

1987 ◽  
Vol 62 (7) ◽  
pp. 503-507
Author(s):  
O Valassiades ◽  
E Pavlidou ◽  
N.A Economou
Keyword(s):  
Transport Properties ◽  
Linear Transport ◽  
Non Linear

scholarly journals RPA APPROACH TO NON-LINEAR TRANSPORT IN QUANTUM DOTS

2009 ◽  
Vol 23 (20n21) ◽  
pp. 4414-4421
Author(s):  
B. TANATAR ◽  
V. MOLDOVEANU
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Random Phase ◽  
Tight Binding ◽  
Polarization Operator ◽  
Approximation Schemes ◽  
Theoretical Treatment ◽  
Gw Approximation ◽  
Linear Transport ◽  
Non Linear

An accurate theoretical treatment of electron-electron interactions in mesoscopic systems is available in very few cases and approximation schemes are developed in most of the applications, especially for many-level quantum dots. Here we present transport calculations within the random-phase approximation for the Coulomb interaction using the Keldysh Green's functions formalism. We describe the quantum dot systems by a tight-binding Hamiltonian. Our method is similar to the one used by Faleev and Stockman [Phys. Rev. B 66 085318 (2002)] in their study of the equilibrium properties of a homogeneous 2D electron gas. The important extension at the formal level is that we combine the RPA and the Keldysh formalism for studying non-linear transport properties of open quantum dots. Within the Keldysh formalism the polarization operator becomes a contour-ordered quantity that should be computed either from the non-interacting Green functions of the coupled quantum dot (the so-called G0W approximation) either self-consistently (GW approximation). We performed both non-selfconsistent and self-consistent calculations and compare the results. In particular we recover the Coulomb diamonds for interacting quantum dots and we discuss the charge sensing effects in parallel quantum dots.

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