Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
1998-05-25
Int. J. Mod. Phys. B, Vol. 12, No. 11, 1147-1170 (1998)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
51 pages, 27 figures, 3 tables, 49 references. This paper is intimately related to the set-up decribed in physics/9804007
Scientific paper
We measure the IQHE on macroscopic (1.5cm x 1.5cm) "quick 'n' dirty" prepared III-V heterostructure samples with van der Pauw and modified Corbino geometries at 1.3 K. We compare our results with (i) data taken on smaller specimens, among them samples with a standard Hall bar geometry, (ii) results of our numerical analysis taking inhomogenities of the 2DEG into account. Our main finding is a confirmation of the expected robustness of the IQHE which favours the development of wide plateaux for small filling factors and very large sample sizes (here with areas 10,000 times larger than in standard arrangements).
Hoch Sascha
Leschinsky Eva
Meier Cedrik
Theis Sabine
Tscheuschner Ralf D.
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