Observation of Screening in the Magneto-Coulomb Drag between Coupled Two-Dimensional Electron Systems

Rübel, H.; Fischer, A.; Dietsche, W.; Klitzing, K. von; Eberl, K.

doi:10.1103/physrevlett.78.1763

Cited by 68 publications

(49 citation statements)

References 12 publications

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“…Moreover, there is no "Hall drag": the direction of the induced motion of charge carriers in the passive layer is expected to coincide with that of the driving current. These predictions contradict numerous experiments [see, e.g., Eisenstein and MacDonald (2004); Finck et al (2010); Lilly et al (1998); Muraki et al (2004); Nandi et al (2012);and Rubel et al (1997b)] showing that Coulomb drag is not only sensitive to mag-netic field, but in fact the drag resistivity can be greatly enhanced once the field is applied.…”

Section: G Single-particle Drag In Magnetic Fieldcontrasting

confidence: 54%

Coulomb drag

2016

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Coulomb drag is a transport phenomenon whereby long-range Coulomb interaction between charge carriers in two closely spaced but electrically isolated conductors induces a voltage (or, in a closed circuit, a current) in one of the conductors when an electrical current is passed through the other. The magnitude of the effect depends on the exact nature of the charge carriers and microscopic, many-body structure of the electronic systems in the two conductors. Drag measurements have become part of the standard toolbox in condensed matter physics that can be used to study fundamental properties of diverse physical systems including semiconductor heterostructures, graphene, quantum wires, quantum dots, and optical cavities.

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Section: G Single-particle Drag In Magnetic Fieldcontrasting

confidence: 54%

Coulomb drag

2016

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“…Theoretical investigations were mostly carried out with incorporating the direct Coulomb mechanism [46,47,48,49]. These calculations show reasonable agreement with the experiments [37,38] that at low temperatures ρ Drag demonstrates an analog of the Shubnikov-De Haas oscillations with amplitudes by two order of magnitude enhanced compared to the zero field drag signal. At the matched densities the measured magnetodrag has a double-peak structure in magnetic field in the inter-quantum Hall plateau regions [38,42].…”

Section: Introductionsupporting

confidence: 57%

Frictional magnetodrag between spatially separated two-dimensional electron systems: Coulomb versus phonon mediated electron–electron interaction

Badalyan

Kim

2003

Solid State Communications

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We study the frictional drag due to Coulomb and phonon mediated electron-electron interaction in a double layer electron system exposed to a perpendicular magnetic field. Within the random phase approximation we calculate the dispersion relation of the intra Landau level magnetoplasmons at finite temperatures and distinguish their contribution to the magnetodrag. We calculate the transresistivity ρ Drag as a function of magnetic field B, temperature T , and interlayer spacing Λ for a matched electron density. For Λ = 200 nm we find that ρ Drag is solely due to phonon exchange and shows no double-peak structure as a function of B. For Λ = 30 nm, ρ Drag shows the double-peak structure and is mainly due to Coulomb interaction. The value of ρ Drag is about 0.3 Ω at T = 2 K and for the half-filled second Lanadau level, which is about 13 times larger than the

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“…2͑c͒ occurs at the ϭ1 spin minimum. In contrast to the early drag experiments, 20,22 the problems of distinguishing spin splitting from screeninginduced splitting do not exist for the interpretation of the photovoltage data.…”

mentioning

confidence: 84%

“…This corresponds closely to the experiments of Fig. 2. A report of the observation of the predicted double peak in drag exists, 20 but more recent work showed it to have an entirely different, spin-related origin. 21 The spin splitting is clearly visible in the conductivity trace of Fig.…”

mentioning

confidence: 99%

Observation of the screening signature in the lateral photovoltage of electrons in the quantum Hall regime

et al. 2001

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The lateral photovoltage generated in the plane of a two-dimensional electron system (2DES) by a focused light spot, exhibits a fine-structure in the quantum oscillations in a magnetic field near the Quantum Hall conductivity minima. A double peak structure occurs near the minima of the longitudinal conductivity oscillations. This is the characteristic signature of the interplay between screening and Landau quantization.

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Observation of Screening in the Magneto-Coulomb Drag between Coupled Two-Dimensional Electron Systems

Cited by 68 publications

References 12 publications

Coulomb drag

Coulomb drag

Frictional magnetodrag between spatially separated two-dimensional electron systems: Coulomb versus phonon mediated electron–electron interaction

Observation of the screening signature in the lateral photovoltage of electrons in the quantum Hall regime

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