Temperature scaling of conductance between quantum hall plateaus.

V. Kagalovsky; B. Horovitz; Y. Avishai

doi:10.1209/0295-5075/31/8/008

Temperature scaling of conductance between quantum hall plateaus.

V. Kagalovsky, B. Horovitz, Y. Avishai

Department of Physics

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Abstract

We show that tunnelling in the quantum Hall regime acquires the form of thermal activation above a crossover temperature T1. The width of the conductance peak oxx between Hall plateaus scales then with temperature as TK with k = 3/7 at T < T1 and crosses over to k = 6/7 at T > Tx. We find that Tl decreases for longer-range potentials or for higher magnetic fields, hence at a given temperature range the apparent k should decrease for samples with shorter-range scattering or in a given sample at higher Landau levels. These results are consistent with data showing 0.3 0.8 for different Landau levels and for the remarkable difference between In^Ga^jAs/InP and GaAs/Alj-Ga^jAs heterostructures.

Original language	English
Pages (from-to)	467-472
Number of pages	6
Journal	EPL
Volume	31
Issue number	8
DOIs	https://doi.org/10.1209/0295-5075/31/8/008
State	Published - 10 Sep 1995

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Physics and Astronomy (all)

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title = "Temperature scaling of conductance between quantum hall plateaus.",

abstract = "We show that tunnelling in the quantum Hall regime acquires the form of thermal activation above a crossover temperature T1. The width of the conductance peak oxx between Hall plateaus scales then with temperature as TK with k = 3/7 at T < T1 and crosses over to k = 6/7 at T > Tx. We find that Tl decreases for longer-range potentials or for higher magnetic fields, hence at a given temperature range the apparent k should decrease for samples with shorter-range scattering or in a given sample at higher Landau levels. These results are consistent with data showing 0.3 0.8 for different Landau levels and for the remarkable difference between In^Ga^jAs/InP and GaAs/Alj-Ga^jAs heterostructures.",

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AU - Horovitz, B.

AU - Avishai, Y.

PY - 1995/9/10

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N2 - We show that tunnelling in the quantum Hall regime acquires the form of thermal activation above a crossover temperature T1. The width of the conductance peak oxx between Hall plateaus scales then with temperature as TK with k = 3/7 at T < T1 and crosses over to k = 6/7 at T > Tx. We find that Tl decreases for longer-range potentials or for higher magnetic fields, hence at a given temperature range the apparent k should decrease for samples with shorter-range scattering or in a given sample at higher Landau levels. These results are consistent with data showing 0.3 0.8 for different Landau levels and for the remarkable difference between In^Ga^jAs/InP and GaAs/Alj-Ga^jAs heterostructures.

AB - We show that tunnelling in the quantum Hall regime acquires the form of thermal activation above a crossover temperature T1. The width of the conductance peak oxx between Hall plateaus scales then with temperature as TK with k = 3/7 at T < T1 and crosses over to k = 6/7 at T > Tx. We find that Tl decreases for longer-range potentials or for higher magnetic fields, hence at a given temperature range the apparent k should decrease for samples with shorter-range scattering or in a given sample at higher Landau levels. These results are consistent with data showing 0.3 0.8 for different Landau levels and for the remarkable difference between In^Ga^jAs/InP and GaAs/Alj-Ga^jAs heterostructures.

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Temperature scaling of conductance between quantum hall plateaus.

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