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Effects of Ballistic Transport in Wires of n-PbTe

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Grabecki G., Wróbel J., Dietl T., Papis E., Kamińska E., Piotrowska A., Ueta Y., Sprinholtz G., Bauer G.

Acta Physica Polonica A

1997

vol. 92

issue 4

789-792

We present results of magnetotransport studies on quantum wires of submicron PbTe epilayers, fabricated by means of electron beam lithography and dry etching. When the wire width is reduced down to 1 μm, the transition from diffusive to ballistic regime is observed. Effects associated with collimation and boundary scattering are found in the Hall, longitudinal, and van der Pauw magnetoresistance for wires and junctions in the shape of a cross.

Conductance Anomalies in Strained Quantum Wires: the Case of PbSe and PbTe

81%

Grabecki G., Wróbel J., Dietl T., Sawicki M., Skośkiewicz T., Papis E., Kamińska E., Piotrowska A., Frank N., Ueta Y., Sprinholtz G., Bauer G.

We show that conducting edge channels are formed in free standing wires of PbSe/BaF_{2} and PbTe/BaF_{2} 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.

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2 Acta Physica Polonica A

1 1997

1 1996

2 Bauer G.

2 Dietl T.

2 Grabecki G.

2 Kamińska E.

2 Papis E.

2 Piotrowska A.

2 Sprinholtz G.

2 Ueta Y.

2 Wróbel J.

1 Frank N.

1 Sawicki M.

1 Skośkiewicz T.

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Effects of Ballistic Transport in Wires of n-PbTe

Conductance Anomalies in Strained Quantum Wires: the Case of PbSe and PbTe