Many-body approach to the terahertz response of Wigner molecules in gated nanowire structures

K. M. Indlekofer, R. Németh, and J. Knoch
Phys. Rev. B 77, 125436 – Published 28 March 2008

Abstract

In this article, we describe a numerical many-body approach for the description of the electromagnetic response of discrete one-dimensional electronic nanosystems. This approach is based on a recursive method to construct a subset of relevant Slater determinants as a many-body basis for the considered system. In turn, we employ a generalized Floquet theory to calculate the periodic many-body statistical operator for the system which is subject to a periodic time-dependent Hamiltonian. As an application of this method, we propose a THz probe technique to obtain spatially resolved information about the electronic spectra inside gated nanowires. This spectroscopic approach employs a segmented multigate design for the local detection of quantum transitions between few-electron states. The obtained simulation results for the intraband THz response spectrum show fingerprints for the formation of Wigner molecules inside the nanowire in the long channel limit.

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  • Received 6 July 2007

DOI:https://doi.org/10.1103/PhysRevB.77.125436

©2008 American Physical Society

Authors & Affiliations

K. M. Indlekofer1,2,*, R. Németh1,3, and J. Knoch4

  • 1Center of Nanoelectronic Systems for Information Technology (CNI), IBN-1, Research Center Jülich GmbH, D-52425 Jülich, Germany
  • 2FH Wiesbaden University of Applied Sciences, Information Technology and Electrical Engineering, Am Brückweg 26, D-65428 Rüsselsheim, Germany
  • 3Institute of Electrical Engineering, Centre of Excellence CENG, Slovak Academy of Sciences, Dúbravská cesta 9, SK-841 04, Bratislava, Slovakia
  • 4IBM Research GmbH Zurich Research Laboratory, 8803 Rueschlikon, Switzerland

  • *m.indlekofer@fz-juelich.de

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Vol. 77, Iss. 12 — 15 March 2008

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