Time-resolved far-infrared spectroscopy of quantum Hall systems

N. G. Kalugin; Yu B. Vasilyev; S. D. Suchalkin; G. Nachtwei; B. E. Sagol; K. Eberl

doi:10.1016/S1386-9477(01)00288-0

Time-resolved far-infrared spectroscopy of quantum Hall systems

N. G. Kalugin
, Yu B. Vasilyev
, S. D. Suchalkin
, G. Nachtwei
, B. E. Sagol
, K. Eberl

Electrical Engineering

Technical University of Braunschweig
Ioffe Physical Technical Institute
Max Planck Institute for Solid State Research

Research output: Contribution to journal › Conference article › peer-review

Abstract

We have performed time-resolved measurements of the far-infrared photoconductivity of the two-dimensional electron system in GaAs/AlGaAs heterostructures in the integer quantum Hall regime (near filling factor ν = 2) by the application of a p-Ge laser radiation. We have found, that the photoresponse (PR) signal has two components, a bolometric component with a decay time not longer than 1-2 μs, and a cyclotron resonance-related component of opposite polarity with a decay time of about 4-5 μs. We have observed a strong dependence of the PR signal on the filling factor, sample current and laser intensity. Surprisingly, no pronounced dependence of the PR decay times on these parameters and on the electron mobility was found. Accordingly, we have found a decreasing influence of the mobility on the critical drift length of the quantum Hall effect breakdown with increasing amplitude when applying short electric pulses.

Original language	English
Pages (from-to)	144-148
Number of pages	5
Journal	Physica E: Low-Dimensional Systems and Nanostructures
Volume	12
Issue number	1-4
DOIs	https://doi.org/10.1016/S1386-9477(01)00288-0
State	Published - Jan 2002
Event	14th International Conference on the - Prague, Czech Republic Duration: Jul 30 2001 → Aug 3 2001

Keywords

Photoconductive and photovoltaic effects
Quantum Hall effects
Time-resolved optical spectroscopies

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10.1016/S1386-9477(01)00288-0

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@article{a40b4d05ee6a43f28d6e0c9d4494489c,

title = "Time-resolved far-infrared spectroscopy of quantum Hall systems",

abstract = "We have performed time-resolved measurements of the far-infrared photoconductivity of the two-dimensional electron system in GaAs/AlGaAs heterostructures in the integer quantum Hall regime (near filling factor ν = 2) by the application of a p-Ge laser radiation. We have found, that the photoresponse (PR) signal has two components, a bolometric component with a decay time not longer than 1-2 μs, and a cyclotron resonance-related component of opposite polarity with a decay time of about 4-5 μs. We have observed a strong dependence of the PR signal on the filling factor, sample current and laser intensity. Surprisingly, no pronounced dependence of the PR decay times on these parameters and on the electron mobility was found. Accordingly, we have found a decreasing influence of the mobility on the critical drift length of the quantum Hall effect breakdown with increasing amplitude when applying short electric pulses.",

keywords = "Photoconductive and photovoltaic effects, Quantum Hall effects, Time-resolved optical spectroscopies",

author = "Kalugin, \{N. G.\} and Vasilyev, \{Yu B.\} and Suchalkin, \{S. D.\} and G. Nachtwei and Sagol, \{B. E.\} and K. Eberl",

year = "2002",

month = jan,

doi = "10.1016/S1386-9477(01)00288-0",

language = "English",

volume = "12",

pages = "144--148",

journal = "Physica E: Low-Dimensional Systems and Nanostructures",

issn = "1386-9477",

number = "1-4",

note = "14th International Conference on the ; Conference date: 30-07-2001 Through 03-08-2001",

}

TY - JOUR

T1 - Time-resolved far-infrared spectroscopy of quantum Hall systems

AU - Kalugin, N. G.

AU - Vasilyev, Yu B.

AU - Suchalkin, S. D.

AU - Nachtwei, G.

AU - Sagol, B. E.

AU - Eberl, K.

PY - 2002/1

Y1 - 2002/1

N2 - We have performed time-resolved measurements of the far-infrared photoconductivity of the two-dimensional electron system in GaAs/AlGaAs heterostructures in the integer quantum Hall regime (near filling factor ν = 2) by the application of a p-Ge laser radiation. We have found, that the photoresponse (PR) signal has two components, a bolometric component with a decay time not longer than 1-2 μs, and a cyclotron resonance-related component of opposite polarity with a decay time of about 4-5 μs. We have observed a strong dependence of the PR signal on the filling factor, sample current and laser intensity. Surprisingly, no pronounced dependence of the PR decay times on these parameters and on the electron mobility was found. Accordingly, we have found a decreasing influence of the mobility on the critical drift length of the quantum Hall effect breakdown with increasing amplitude when applying short electric pulses.

AB - We have performed time-resolved measurements of the far-infrared photoconductivity of the two-dimensional electron system in GaAs/AlGaAs heterostructures in the integer quantum Hall regime (near filling factor ν = 2) by the application of a p-Ge laser radiation. We have found, that the photoresponse (PR) signal has two components, a bolometric component with a decay time not longer than 1-2 μs, and a cyclotron resonance-related component of opposite polarity with a decay time of about 4-5 μs. We have observed a strong dependence of the PR signal on the filling factor, sample current and laser intensity. Surprisingly, no pronounced dependence of the PR decay times on these parameters and on the electron mobility was found. Accordingly, we have found a decreasing influence of the mobility on the critical drift length of the quantum Hall effect breakdown with increasing amplitude when applying short electric pulses.

KW - Photoconductive and photovoltaic effects

KW - Quantum Hall effects

KW - Time-resolved optical spectroscopies

UR - https://www.scopus.com/pages/publications/0035239578

U2 - 10.1016/S1386-9477(01)00288-0

DO - 10.1016/S1386-9477(01)00288-0

M3 - Conference article

AN - SCOPUS:0035239578

SN - 1386-9477

VL - 12

SP - 144

EP - 148

JO - Physica E: Low-Dimensional Systems and Nanostructures

JF - Physica E: Low-Dimensional Systems and Nanostructures

IS - 1-4

T2 - 14th International Conference on the

Y2 - 30 July 2001 through 3 August 2001

ER -

Time-resolved far-infrared spectroscopy of quantum Hall systems

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Keywords

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