condensed matter - What is the dynamic conductivity? How it …
2022年10月20日 · If you apply a time-dependent electric field, e.g. $E \left( t \right) = E_{0} \cos \left( \omega t \right)$, the conductivity $\sigma \left( \omega \right)$ becomes a function of the frequency $\omega$ and is the dynamic conductivity of the medium. The static conductivity $\sigma \left( \omega = 0 \right)$ is a special case of the dynamic ...
Universal Dynamic Conductivity and Quantized Visible Opacity …
2008年3月26日 · Despite being only one atom thick, graphene is found to absorb a significant (pi times alpha=2.3%) fraction of incident white light, which is a consequence of graphene's unique electronic structure. This value translates into universal dynamic conductivity G =e^2/4h_bar within a few percent accuracy.
Dynamic conductivity of polymer dielectrics under time …
2019年6月5日 · The dynamic conductivity under thermal cycle of polyimide is analyzed from numerical calculations and experimental tests. The conductivity characteristics of polymer dielectric under temperature cycling was found to be dominated by temperature and time, because of filled traps and rapid changes in temperature.
Dynamic Conductivity of Ferroelectric Domain Walls in BiFeO3
2011年4月12日 · We have revealed that ferroelectric domain walls in multiferroic BiFeO 3 are inherently dynamic electronic conductors, closely mimicking memristive behavior and contrary to the usual assumption of rigid conductivity. Applied electric field can cause a localized transition between insulating and conducting domain walls, tune domain wall ...
Dynamic conductivity in graphene beyond linear response
2009年7月21日 · Abstract: The independence of the dynamic conductivity of intrinsic graphene of frequency takes its origin in the compensation of the vanishing density of states by the diverging matrix element of the corresponding interband transition. The applicability of the linear response approach, however, breaks down when this matrix element becomes ...
一维离子导体的动态电导率。阻抗，奈奎斯特图,Condensed …
2016年12月1日 · Dynamic conductivity of the one-dimensional ion conductor is investigated at different values of the interaction constant between particles and the modulating field. The consideration is based on the hard-core boson lattice model. Calculations are performed for finite one-dimensional cluster using the exact diagonalization method.
Dynamical electrical conductivity of graphene - IOPscience
2017年5月25日 · We have presented a theoretical study of the dynamical electrical conductivity of graphene by using the memory function formalism with electron-acoustic phonon scattering. We have reproduced the zero frequency (DC) results namely, T 4 behavior of resistivity at low temperature, and T-linear at high temperature [ 8 – 10 , 12 ].
Dynamic Conductivity in Graphene beyond Linear Response
2009年12月8日 · We show that the physics of the ac conductivity in this regime is determined by Rabi oscillations and obtain it beyond the first-order perturbation theory. Under strong applied electric fields, the induced current eventually saturates at a …
Electrodynamics of carbon nanotubes: Dynamic conductivity, impedance ...
1999年12月15日 · Effective boundary conditions, in the form of two-sided impedance boundary conditions, are formulated for the linear electrodynamics of single- and multishell carbon nanotubes (CN’s).
2018年4月17日 · In this paper, we present a quantum statistical model for electronic conduction in dense fluid hydrogen. We focus on the region of 140-170 GPa and 2000-2500 K where there is little doubt that hydrogen attains metallic character.