Berlin 2008 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 31: Poster II

HL 31.44: Poster

Dienstag, 26. Februar 2008, 16:30–19:00, Poster D

Many-body model for the simulation of few-electron THz response in gated nanowires — •Radoslav Németh and Klaus Michael Indlekofer — CNI/JARA, IBN-1, Research Center Jülich GmbH, D-52425 Jülich, Germany

We consider a THz probe technique for the spatially resolved analysis of electronic spectra in nanowire-based transistors employing a multi-segment gate design [1]. We simulate the THz response of few-electron quantum states within the nanowire channel by use of a recently developed numerical many-body technique [2,3]. The discussed example demonstrates that signatures of Wigner-like charge density waves can be identified by use of this method, which lies beyond the scope of standard meanfield approaches. As such, the proposed multi-gate THz probe technique might prove useful in a future experimental realization as a means to characterize nanoscale devices which are dominated by quantization and few-electron Coulomb effects.

[1] K. M. Indlekofer, et al., DRC2007, IEEE Cat. 07TH8948, 179 (2007)

[2] K. M. Indlekofer and R. Németh, cond-mat/0609540, submitted (2007)

[3] K. M. Indlekofer, J. Knoch, and J. Appenzeller, Phys. Rev. B 72, 125308 (2005)