Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2003-06-13
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
4 pages; manuscript for MSS11 conference 2003, Nara, Japan
Scientific paper
10.1016/j.physe.2003.11.146
Semiconductor-metal hybrid structures can exhibit a very large geometrical magnetoresistance effect, the so-called extraordinary magnetoresistance (EMR) effect. In this paper, we analyze this effect by means of a model based on the finite element method and compare our results with experimental data. In particular, we investigate the important effect of the contact resistance $\rho_c$ between the semiconductor and the metal on the EMR effect. Introducing a realistic $\rho_c=3.5\times 10^{-7} \Omega{\rm cm}^2$ in our model we find that at room temperature this reduces the EMR by 30% if compared to an analysis where $\rho_c$ is not considered.
Grundler D.
Holz Michael
Kronenwerth O.
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