PHENOMENA IN RESONANT TUNNELING THROUGH DEGENERATED ENERGY STATES WITH ELECTRON CORRELATION

We introduce a general analysis method, which allows us to simulate the operation of high-performance molecular nano-devices and to design the expected function of a wide range of devices in nano-scale size. The method is based on the use of a resonant tunneling phenomenon, admitting strong electron correlation in a quantum dot with degenerated states. Three examples of the application of this method are given: Coulomb repulsion, uncorrelated resonant tunneling, and electron-phonon interaction. It is shown that there is a good agreement with experimental data in all three cases.

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Nonlinear resonant tunneling through doubly degenerate local state and strong electron-phonon interaction

Low Temperature Physics ◽

10.1063/1.593815 ◽

1999 ◽

Vol 25 (10) ◽

pp. 776-781 ◽

Cited By ~ 1

Author(s):

V. N. Ermakov

Keyword(s):

Resonant Tunneling ◽

Local State ◽

Phonon Interaction ◽

Strong Electron ◽

Electron Phonon Interaction

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Optical Spectroscopic Studies of a Soluble Fluorene-Based Conjugated Polymer: A Hydrostatic Pressure and Temperature Study

MRS Proceedings ◽

10.1557/proc-708-bb10.7 ◽

2001 ◽

Vol 708 ◽

Author(s):

S. Guha ◽

J.D. Rice ◽

C. M. Martin ◽

W. Graupner ◽

M. Chandrasekhar ◽

...

Keyword(s):

Hydrostatic Pressure ◽

Conjugated Polymer ◽

Spectroscopic Properties ◽

Spectroscopic Studies ◽

Phonon Interaction ◽

Optical Studies ◽

Strong Electron ◽

Conjugated Molecules ◽

Electron Phonon Interaction ◽

Backbone Conformation

ABSTRACTSpectroscopic properties of conjugated molecules/polymers have varying degrees of sensitivity to backbone conformation. Optical studies are presented as a function of temperature and hydrostatic pressure, using photoluminescence and Raman scattering from two polymers with distinct differences in their backbone conformation, namely, polyfluorene (PF) and ladder type poly(para-phenylene)(m-LPPP). In contrast to the photoluminescence (PL) vibronics in mLPPP, the 0-0 PL vibronic peak in PF shows a red-shift with increasing temperatures. Pressure studies reveal that the PL spectrum of PF red-shifts and broadens with increasing pressures. The phonon lines in PF show an antiresonance effect at higher pressures indicating a strong electron-phonon interaction.

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Optimization of synthetic jet actuation by analytical modeling

Aircraft Engineering and Aerospace Technology ◽

10.1108/aeat-06-2019-0127 ◽

2021 ◽

Vol ahead-of-print (ahead-of-print) ◽

Author(s):

Max Huber ◽

Andreas Zienert ◽

Perez Weigel ◽

Martin Schüller ◽

Hans-Reinhard Berger ◽

...

Keyword(s):

High Performance ◽

Synthetic Jet ◽

Parameter Study ◽

Content Type ◽

One Dimensional ◽

Wide Range ◽

Jet Actuators ◽

Different Dimensions ◽

Oscillation Correction ◽

Good Agreement

Purpose The purpose of this paper is to analyze and optimize synthetic jet actuators (SJAs) by means of a literature-known one-dimensional analytical model. Design/methodology/approach The model was fit to a wide range of experimental data from in-house built SJAs with different dimensions. A comprehensive parameter study was performed to identify coupling between parameters of the model and to find optimal dimensions of SJAs. Findings The coupling of two important parameters, the diaphragm resonance frequency and the cavity volume, can be described by a power law. Optimal orifice length and diameter can be calculated from cavity height in good agreement with literature. A transient oscillation correction is required to get correct simulation outcomes. Originality/value Based on these findings, SJA devices can be optimized for maximum jet velocity and, therefore, high performance.

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Metallic hydrogen with a strong electron-phonon interaction at a pressure of 300–500 GPa

Solid State Communications ◽

10.1016/j.ssc.2017.06.005 ◽

2017 ◽

Vol 262 ◽

pp. 33-39 ◽

Cited By ~ 1

Author(s):

N.N. Degtyarenko ◽

E.A. Mazur ◽

K.S. Grishakov

Keyword(s):

Metallic Hydrogen ◽

Phonon Interaction ◽

Strong Electron ◽

Electron Phonon Interaction

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Evidence of strong electron-phonon interaction in a GaN-based quantum cascade emitter

Superlattices and Microstructures ◽

10.1016/j.spmi.2020.106631 ◽

2020 ◽

Vol 145 ◽

pp. 106631

Author(s):

Daniel Hofstetter ◽

Hans Beck ◽

John E. Epler ◽

Lutz Kirste ◽

David P. Bour

Keyword(s):

Phonon Interaction ◽

Strong Electron ◽

Quantum Cascade ◽

Electron Phonon Interaction

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Resonant Tunneling with Electron-Phonon Interaction: An Exactly Solvable Model

Physical Review Letters ◽

10.1103/physrevlett.61.2633.2 ◽

1988 ◽

Vol 61 (22) ◽

pp. 2633-2633 ◽

Cited By ~ 4

Author(s):

Ned S. Wingreen ◽

Karsten W. Jacobsen ◽

John W. Wilkins

Keyword(s):

Resonant Tunneling ◽

Solvable Model ◽

Exactly Solvable Model ◽

Phonon Interaction ◽

Electron Phonon Interaction ◽

Exactly Solvable

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SUPERCONDUCTIVITY WITH SOFT LATTICE MODES IN LaBaCuO and YBaCuO

International Journal of Modern Physics B ◽

10.1142/s021797920100807x ◽

2001 ◽

Vol 15 (32) ◽

pp. 4145-4160 ◽

Cited By ~ 2

Author(s):

STEPHEN NETTEL

Keyword(s):

Electron Correlation ◽

Pair Correlation ◽

Negative Energy ◽

Variational Calculation ◽

Phonon Interaction ◽

Phonon Softening ◽

Intermediate Coupling ◽

Normal Coordinates ◽

Electron Phonon Interaction ◽

Lattice Modes

The canonical transformation employed in polaron theory at intermediate coupling is generalized to the electron phonon interaction of an entire band of electrons. Interelectron interactions result. The overall lattice-electron correlation is obtained with a variational calculation, balancing the extra elastic energy stored in the lattice against the negative energy arising from BCS pair correlation. The requisite phonon softening to attain any given value of Tc in metallic LaBaCuO and YBaCuO are estimated. The implicit fluctuations in the lattice normal coordinates are compared with results yielded by the EXAFS measurements of Oyanagi et al.

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