Electron-avalanche amplifier based on the electronic Venturi effect

Taubert, D.; Schinner, G. J.; Tranitz, Hans-Peter; Wegscheider, Werner; Tomaras, C.; Kehrein, Stefan; Ludwig, Stefan

doi:10.1103/physrevb.82.161416

Cited by 26 publications

(43 citation statements)

References 14 publications

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“…The scattering of quantum-confined electrons by phonons, both with 22,[29][30][31] and without 32,33 magnetic field, has been studied extensively. These previous studies, however, have focused on macroscopic properties such as conductance or optical absorption.…”

Section: Phonon Relaxation Ratesmentioning

confidence: 99%

“…7 it was reported that, at certain magnetic field strengths, a significant fraction of the electrons arrive at the detector with an energy that is some integermultiple of ∼36meV less than their energy at emission. Since 36meV corresponds approximately to the energy of LO phonons in GaAs 22 , it was concluded that these electrons had emitted one or more LO phonons en route to detector. Moreover, Fletcher et al 7 report that whilst these "phonon replica" features are pronounced at lower fields (B = 6T), they are scarcely visible at high fields (B = 12T).…”

Section: Introductionmentioning

confidence: 99%

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Phonon emission and arrival times of electrons from a single-electron source

et al. 2016

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In recent charge-pump experiments, single electrons are injected into quantum Hall edge channels at energies significantly above the Fermi level. We consider here the relaxation of these hot edge-channel electrons through longitudinal-optical phonon emission. Our results show that the probability for an electron in the outermost edge channel to emit one or more phonons en route to a detector some microns distant along the edge channel suffers a double-exponential suppression with increasing magnetic field. This explains recent experimental observations. We also describe how the shape of the arrival-time distribution of electrons at the detector reflects the velocities of the electronic states post phonon emission. We show how this can give rise to pronounced oscillations in the arrival-time-distribution width as a function of magnetic field or electron energy.

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Section: Phonon Relaxation Ratesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Phonon emission and arrival times of electrons from a single-electron source

et al. 2016

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“…From these results, we can figure out that during solution decomposition, the narrow waist in the cell's middle leads to increasing the flow of free electrons from the high-to low-temperature regions. Consequently, this produces an avalanche amplification of electrical current in the middle, resulting in a situation comparable to the Venturi effect in hydrodynamics [19,20]. …”

Section: Resultsmentioning

confidence: 99%

Thermoelectric Power Generation in a Vacuum Cell of Decomposing Liquid Potassium-Ammonia Solutions

2013

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This paper describes the design of high-efficiency reversible thermoelectric conversion devices for thermoelectric power generation through liquid potassium-ammonia (K-NH 3 ) solutions. The validity and effectiveness of the proposed design is verified by thermoelectric experiments using two kinds of "U"-shaped vacuum cells with a NH 3 -gas passageway connecting both legs of "U", one of which has a waist in the middle of a liquid flow passage. The experimental results show that the gas passageway provides a stable and reliable reaction by preventing an internal pressure imbalance due to NH 3 gasification during solution decomposition; hence, long-term, reversible thermoelectric power can be effectively derived by stably inducing two separate phase transitions in the cell. In addition, the effect of the narrow waist in the cell's middle is verified to cause an increase in thermoelectric conversion efficiency due to improved electric conductivity of liquid in the vacuum cell. Consequently, using these technologies in thermoelectric cell potentially leads to long-time, high-efficiency thermoelectric power generation through liquid K-NH 3 solutions.

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“…While the electrons pass the barrier, the positively charged holes are trapped between BE and BC. Without a connection to the environment, a positive charge would accumulate here, 5 but since the side contact is grounded and therefore provides a reservoir of charge carriers, electrons are drawn from this contact into the device. The jet pump analogy is therefore especially appealing as it incorporates the attractive force exerted on the "fluid" in the side port.…”

Section: -mentioning

confidence: 99%

“…The electronic analogy of the Venturi effect has been introduced in Ref. 5; other experiments describing related physics but, in part, based upon different effects have been performed since the 1990s. 6,7 II.…”

Section: Introductionmentioning

confidence: 99%

An electron jet pump: The Venturi effect of a Fermi liquid

Taubert¹,

Schinner²,

Tomaras³

et al. 2011

Journal of Applied Physics

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A three-terminal device based upon a two-dimensional electron system is investigated in the regime of nonequilibrium transport. Excited electrons scatter with the cold Fermi sea and transfer energy and momentum to other electrons. A geometry analogous to a water jet pump is used to create a jet pump for electrons. Because of its phenomenological similarity we name the observed behavior the "electronic Venturi effect." V C

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Electron-avalanche amplifier based on the electronic Venturi effect

Cited by 26 publications

References 14 publications

Phonon emission and arrival times of electrons from a single-electron source

Phonon emission and arrival times of electrons from a single-electron source

Thermoelectric Power Generation in a Vacuum Cell of Decomposing Liquid Potassium-Ammonia Solutions

An electron jet pump: The Venturi effect of a Fermi liquid

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