Quantum transport in ballistic conductors: evolution from conductance quantization to resonant tunneling

Details Quantum transport in ballistic conductors: evolution from conductance quantization to resonant tunneling Quantum transport in ballistic conductors: evolution from conductance quantization to resonant tunneling

2000-02-25

arxiv.org/abs/cond-mat/0002415v2

J. Phys. Condens. Matter 12, 9629 (2000).

Physics

Condensed Matter

Disordered Systems and Neural Networks

4 pages, 4 embedded EPS figures, revised version

Scientific paper

10.1088/0953-8984/12/46/310

We study the transport properties of a three dimensional atomic-scale contact in the ballistic regime. The results for the conductance and related transmission eigenvalues show how the properties of the ideal semi-infinite leads (i.e. measuring device) as well as the coupling between the leads and the conductor influence the transport in a two-probe geometry. We observe the evolution from conductance quantization to resonant tunneling conductance peaks upon changing the hopping parameter in the disorder-free tight-binding Hamiltonian which describes the leads and the coupling to the sample.

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