Correlated electron current and temperature dependence of the conductance of a quantum point contact

C. Sloggett, A. I. Milstein and O. P. Sushkov ()

The European Physical Journal B: Condensed Matter and Complex Systems, 2008, vol. 61, issue 4, 427-432

Abstract: We investigate finite temperature corrections to the Landauer formula due to electron–electron interaction within the quantum point contact. When the Fermi level is close to the barrier height, the conducting wavefunctions become peaked on the barrier, enhancing the electron–electron interaction. At the same time, away from the contact the interaction is strongly suppressed by screening. To describe electron transport we formulate and solve a kinetic equation for the density matrix of electrons. The correction to the conductance G is negative and strongly enhanced in the region 0.5 × 2e 2 /h ≤ G ≤ 1.0 × 2e 2 /h. Our results for conductance agree with the so-called “0.7 structure” observed in experiments. Copyright EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2008

Keywords: 73.23.-b Electronic transport in mesoscopic systems, 72.10.-d Theory of electronic transport; scattering mechanisms, 73.21.Hb Quantum wires, 73.63.Rt Nanoscale contacts, (search for similar items in EconPapers)
Date: 2008
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
http://hdl.handle.net/10.1140/epjb/e2008-00092-2 (text/html)
Access to full text is restricted to subscribers.

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:spr:eurphb:v:61:y:2008:i:4:p:427-432

Ordering information: This journal article can be ordered from
http://www.springer.com/economics/journal/10051

DOI: 10.1140/epjb/e2008-00092-2

Access Statistics for this article

The European Physical Journal B: Condensed Matter and Complex Systems is currently edited by P. Hänggi and Angel Rubio

More articles in The European Physical Journal B: Condensed Matter and Complex Systems from Springer, EDP Sciences
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().