Magnetotransport in a chaotic scattering cavity with tunable electron density

M. W. Keller; O. Millo; A. Mittal; D. E. Prober; R. N. Sacks

doi:10.1016/0039-6028(94)90943-1

Magnetotransport in a chaotic scattering cavity with tunable electron density

M. W. Keller^*, O. Millo, A. Mittal, D. E. Prober, R. N. Sacks

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

89 Scopus citations

Abstract

We have measured the resistance versus magnetic field and Fermi energy for two stadium-shaped cavities in which chaotic scattering is expected. We fit the power spectra of the magnetoresistance fluctuations to semiclassical chaotic scattering theory and find a characteristic field which scales with cavity dimensions as predicted by classical simulations. Measurements of conductance versus Fermi energy indicate a significant contribution from short, non-chaotic paths. We have also studied the energy-averaged conductance as a function of magnetic field. We observe a ballistic weak localization effect similar to that predicted by recent calculations.

Original language	English
Pages (from-to)	501-506
Number of pages	6
Journal	Surface Science
Volume	305
Issue number	1-3
DOIs	https://doi.org/10.1016/0039-6028(94)90943-1
State	Published - 20 Mar 1994
Externally published	Yes

Bibliographical note

Funding Information:
We thankR .G. Wheeler,A .D. Stone,a nd H.U. Baranger for helpful discussions.R esearch supported by NSF DMR 9112752a nd equipment purchasedu nder NSF DMR 9112451.

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title = "Magnetotransport in a chaotic scattering cavity with tunable electron density",

abstract = "We have measured the resistance versus magnetic field and Fermi energy for two stadium-shaped cavities in which chaotic scattering is expected. We fit the power spectra of the magnetoresistance fluctuations to semiclassical chaotic scattering theory and find a characteristic field which scales with cavity dimensions as predicted by classical simulations. Measurements of conductance versus Fermi energy indicate a significant contribution from short, non-chaotic paths. We have also studied the energy-averaged conductance as a function of magnetic field. We observe a ballistic weak localization effect similar to that predicted by recent calculations.",

author = "Keller, {M. W.} and O. Millo and A. Mittal and Prober, {D. E.} and Sacks, {R. N.}",

note = "Funding Information: We thankR .G. Wheeler,A .D. Stone,a nd H.U. Baranger for helpful discussions.R esearch supported by NSF DMR 9112752a nd equipment purchasedu nder NSF DMR 9112451.",

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T1 - Magnetotransport in a chaotic scattering cavity with tunable electron density

AU - Keller, M. W.

AU - Millo, O.

AU - Mittal, A.

AU - Prober, D. E.

AU - Sacks, R. N.

N1 - Funding Information: We thankR .G. Wheeler,A .D. Stone,a nd H.U. Baranger for helpful discussions.R esearch supported by NSF DMR 9112752a nd equipment purchasedu nder NSF DMR 9112451.

PY - 1994/3/20

Y1 - 1994/3/20

N2 - We have measured the resistance versus magnetic field and Fermi energy for two stadium-shaped cavities in which chaotic scattering is expected. We fit the power spectra of the magnetoresistance fluctuations to semiclassical chaotic scattering theory and find a characteristic field which scales with cavity dimensions as predicted by classical simulations. Measurements of conductance versus Fermi energy indicate a significant contribution from short, non-chaotic paths. We have also studied the energy-averaged conductance as a function of magnetic field. We observe a ballistic weak localization effect similar to that predicted by recent calculations.

AB - We have measured the resistance versus magnetic field and Fermi energy for two stadium-shaped cavities in which chaotic scattering is expected. We fit the power spectra of the magnetoresistance fluctuations to semiclassical chaotic scattering theory and find a characteristic field which scales with cavity dimensions as predicted by classical simulations. Measurements of conductance versus Fermi energy indicate a significant contribution from short, non-chaotic paths. We have also studied the energy-averaged conductance as a function of magnetic field. We observe a ballistic weak localization effect similar to that predicted by recent calculations.

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Magnetotransport in a chaotic scattering cavity with tunable electron density

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