Abstract
We report conductance measurements in quantum wires made of aluminum arsenide, a heavy-mass, multivalley one-dimensional (1D) system. Zero-bias conductance steps are observed as the electron density in the wire is lowered, with additional steps observable upon applying a finite dc bias. We attribute these steps to depopulation of successive 1D subbands. The quantum conductance is substantially reduced with respect to the anticipated value for a spin- and valley-degenerate 1D system. This reduction is consistent with disorder-induced, intrawire backscattering that suppresses the transmission of 1D modes. Calculations are presented to demonstrate the role of strain in the 1D states of this cleaved-edge structure.
Original language | English (US) |
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Article number | 052101 |
Journal | Applied Physics Letters |
Volume | 87 |
Issue number | 5 |
DOIs | |
State | Published - 2005 |
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)