Format

Send to

Choose Destination
See comment in PubMed Commons below
Science. 2008 Feb 29;319(5867):1226-9. doi: 10.1126/science.1152458.

Long-range order in electronic transport through disordered metal films.

Author information

1
Physikalisches Institut, Universit├Ąt Heidelberg, Philosophenweg 12, 69120 Heidelberg, Germany.

Abstract

Ultracold atom magnetic field microscopy enables the probing of current flow patterns in planar structures with unprecedented sensitivity. In polycrystalline metal (gold) films, we observed long-range correlations forming organized patterns oriented at +/-45 degrees relative to the mean current flow, even at room temperature and at length scales larger than the diffusion length or the grain size by several orders of magnitude. The preference to form patterns at these angles is a direct consequence of universal scattering properties at defects. The observed amplitude of the current direction fluctuations scales inversely to that expected from the relative thickness variations, the grain size, and the defect concentration, all determined independently by standard methods. Ultracold atom magnetometry thus enables new insight into the interplay between disorder and transport.

PMID:
18309080
DOI:
10.1126/science.1152458
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for HighWire
    Loading ...
    Support Center