Temperature induced phase averaging in one-dimensional mesoscopic systems

Details Temperature induced phase averaging in one-dimensional mesoscopic systems Temperature induced phase averaging in one-dimensional mesoscopic systems

2006-06-19

arxiv.org/abs/cond-mat/0606486v4

Phys. Rev. B 75, 035126 (2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

6 pages, 5 figures; added one figure; slightly extended

Scientific paper

10.1103/PhysRevB.75.035126

We analyse phase averaging in one-dimensional interacting mesoscopic systems with several barriers and show that for incommensurate positions an independent average over several phases can be induced by finite temperature. For three strong barriers with conductances G_i and mutual distances larger than the thermal length, we obtain G ~ sqrt{G_1 G_2 G_3} for the total conductance G. For an interacting wire, this implies power laws in G(T) with novel exponents, which we propose as an experimental fingerprint to distinguish temperature induced phase averaging from dephasing.

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