Results 171 to 180 of about 209,920 (241)

Nonlinear electric conductivity of point contacts in the multiphonon generation regime

Soviet Journal of Low Temperature Physics, 1988
The electron-phonon relaxation of the transport current in point contacts of conductors with a large value of the parameter eV/εF is studied theoretically (here, eV is the bias voltage at the contact, and εf is the Fermi energy of the current carriers ...
I. Itskovich, R. I. Shekhter, I. O. Kulik   +2 more
semanticscholar   +1 more source

Electric field regulation and parameter optimization of surface nonlinear conductivity spacer for 500 kV DC-GIL

IEEE transactions on dielectrics and electrical insulation, 2020
In this paper, the surface nonlinear conductivity (SNC) spacer is proposed to regulate the electric field in a 500 kV DC-GIL, whose effects are verified by assigning a temperature gradient, a rough electrode, a metal particle and a polarity reversal ...
H. C. Liang, B. Du, J. Li
semanticscholar   +1 more source

Combined geometrical techniques and applying nonlinear field dependent conductivity layers to address the high electric field stress issue in high voltage high-density wide bandgap power modules

IEEE transactions on dielectrics and electrical insulation, 2020
Wide bandgap (WBG) power modules made from materials such as SiC and GaN (and soon Ga2O3 and diamond), which can tolerate higher voltages and currents than Si-based modules, are the most promising solution for reducing the size and weight of power ...
M. Tousi, M. Ghassemi
semanticscholar   +1 more source

Characterization of Nonlinear Field-Dependent Conductivity Layer Coupled With Protruding Substrate to Address High Electric Field Issue Within High-Voltage High-Density Wide Bandgap Power Modules

IEEE Journal of Emerging and Selected Topics in Power Electronics, 2020
In addition to higher blocking voltages of wide bandgap (WBG) power modules, their volume has been targeted to be several times smaller than that of Si-based modules.
M. Tousi, M. Ghassemi
semanticscholar   +1 more source

Microscopic analysis of relaxation behavior in nonlinear optical conductivity of graphene

Physica Scripta, 2023
We produce a general formalism to study the interband dynamical optical conductivity in the nonlinear regime of graphene in the presence of a quantum bath comprising phonons and electrons.
Bristi Ghosh, S. Dattagupta, M. Bandyopadhyay   +2 more
semanticscholar   +1 more source

Nonlinear electrical conductivity for a strongly coupled plasma

The Physics of Fluids, 1987
A nonlinear analysis of electrical conductivity in a plasma is given, stemming from the Uehling–Uhlenbeck equation. Anisotropy due to an applied electric field is incorporated through a Legendre polynomial expansion of the distribution function. The plasma is comprised of ions, electrons, and a neutral component.
Schenter, Gregory K., Liboff, Richard L.
openaire   +2 more sources

Preserved Symmetries in Nonlinear Electric Conduction

AIP Conference Proceedings, 2005
For the general case of a mesoscopic, two‐terminal device with no geometrical symmetry, conductance symmetries break down in the non‐linear regime. Using basic symmetry arguments, we predict and experimentally confirm a set of symmetry relations that are preserved for electric conductors with respect to bias voltage, V, and B in the non‐linear regime.
openaire   +1 more source

Electric-Field- and Temperature-Dependent Nonlinear Conductivity of SiC/Epoxy Resin Composites at Cryogenic Temperature

IEEE transactions on applied superconductivity, 2020
Nonlinear conductive composite insulation has been widely used to reduce nonuniformities in the local high electric field of high-voltage direct-current equipment.
Zhonglei Li, Ren-Tsung Huang, B. Du, T. Han   +3 more
semanticscholar   +1 more source

Improvement of Nonlinear Conductivity and Flashover Characteristics of SiC/LDPE Composite via the DC Electric Field Assist

IEEE transactions on dielectrics and electrical insulation
Nonlinear conductivity characteristic of the nonlinear resistive field grading material is affected by the filler distribution. The dc electric field assist is capable of regulating the filler distribution, but it is rarely used in the development of the
Yongsen Han, Jie Chen, Hang Yin, Yunlong Sun, Xinyu Wang, Zhonghua Li   +5 more
semanticscholar   +1 more source

Electric Field Mitigation in (U)WBG Power Module Using Nonlinear Field-Dependent Conductivity Layer and Protruding Substrate Under High-Frequency, High-Slew-Rate Square Wave Voltages

IEEE transactions on dielectrics and electrical insulation
Incorporating nonlinear resistive field grading materials (FGMs) onto metal-brazed substrates has been widely investigated as an efficient electric field reduction strategy at triple points (TPs) within ultrawide bandgap [(U)WBG] power modules.
Pujan Adhikari, M. Ghassemi
semanticscholar   +1 more source