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HL: Fachverband Halbleiterphysik

HL 50: HL Poster IV

HL 50.39: Poster

Donnerstag, 15. März 2018, 19:00–21:00, Poster B

Magneto-conductivity experiments and simulation on two dimensional Lorentz gas systems — •Beate Horn¹, Jakob Schluck¹, Klaus Pierz², Hans Werner Schumacher², and Thomas Heinzel¹ — ¹Institut für Experimentelle Physik der kondensierten Materie, Heinrich-Heine-Universität, Universitätsstraße 1, 40225 Düsseldorf, Germany — ²Physikalisch-Technische Bundesanstalt, Bundesalle 100, 38116 Braunschweig, Germany

The Lorentz gas system (LGS) is of fundamental scientific interest predicting omnipresent phenomena like the motion of pathogens in blood stream or the electron motion in porous media. In the present contribution two dimensional LGSs are realized by patterning Poission distributed obstacles of equal size and shape by electron beam lithography and reactive ion etching on a high electron mobility GaAs/Ga_xAl_1−xAs heterostructure [1]. Magneto-conductivity measurements are performed on samples with different obstacle densities. The as described system is implemented in numerical simulations using the Python package Kwant [2]. Experimental and simulated data are compared.

[1] N. Siboni, J. Schluck, K. Pierz, H.W. Schumacher, D. Kazazis, J. Horbach and T. Heinzel, arXiv:1708.01039 ( 2017 ) (manuscript submitted for publication)

[2] Groth, M. Wimmer, A. R. Akhmerov, X. Waintal, Kwant: a software package for quantum transport, New J. Phys. 16, 063065, ( 2014 )