Conductance Anomalies in Strained Quantum Wires: the Case of PbSe and PbTe |
| G. Grabecki, J. Wróbel, T. Dietl, M. Sawicki, T. Skośkiewicz Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warszawa, Poland E. Papis, E. Kamińska, A. Piotrowska Institute of Electron Technology, Al. Lotników 32/46, 02-668 Warszawa, Poland N. Frank, Y. Ueta, G. Sprinholtz and G. Bauer Institüt für Halbleiterphysik, Johannes Kepler Universität Linz, 4040 Linz, Austria |
| Full Text PDF |
| We show that conducting edge channels are formed in free standing wires of PbSe/BaF2 and PbTe/BaF2 as temperature is lowered. The effect results from spatially inhomogeneous strain caused by a difference between the thermal expansion coefficients of the epilayer and the substrate. The presence of the edge channels can explain anomalous mesoscopic effects observed previously in these wires. |
| DOI: 10.12693/APhysPolA.90.797 PACS numbers: 71.55.Jv |