Dynamic magnetoconductance fluctuations and oscillations in mesoscopic wires and rings

D. Z. Liu, Ben Yu Kuang Hu, Charles A Stafford, S. Das Sarma

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Using a finite-frequency recursive Green's-function technique, we calculate the dynamic magnetoconductance fluctuations and oscillations in disordered mesoscopic normal-metal systems, incorporating interparticle Coulomb interactions within a self-consistent potential method. In a disorderd metal wire, we observe ergodic behavior in the dynamic conductance fluctuations. At low ω, the real part of the conductance fluctuations is essentially given by the dc universal conductance fluctuations while the imaginary part increases linearly from zero, but for ω greater than the Thouless energy and temperature, the fluctuations decrease as ω-1/2. Similar frequency-dependent behavior is found for the Aharonov-Bohm oscillations in a metal ring. However, the Al'tshuler-Aronov-Spivak oscillations, which predominate at high temperatures or in rings with many channels, are strongly suppressed at high frequencies, leading to interesting crossover effects in the ω dependence of the magnetoconductance oscillations.

Original languageEnglish (US)
Pages (from-to)5799-5802
Number of pages4
JournalPhysical Review B
Volume50
Issue number8
DOIs
StatePublished - 1994
Externally publishedYes

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Metals
wire
Wire
oscillations
rings
Recursive functions
Coulomb interactions
Green's function
metals
recursive functions
Temperature
crossovers
Green's functions
interactions
temperature
energy

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Dynamic magnetoconductance fluctuations and oscillations in mesoscopic wires and rings. / Liu, D. Z.; Hu, Ben Yu Kuang; Stafford, Charles A; Das Sarma, S.

In: Physical Review B, Vol. 50, No. 8, 1994, p. 5799-5802.

Research output: Contribution to journalArticle

Liu, D. Z. ; Hu, Ben Yu Kuang ; Stafford, Charles A ; Das Sarma, S. / Dynamic magnetoconductance fluctuations and oscillations in mesoscopic wires and rings. In: Physical Review B. 1994 ; Vol. 50, No. 8. pp. 5799-5802.
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