Transport properties of copper with excited electron subsystem

We have investigated transport properties of an electron subsystem of copper heated by a femtosecond laser pulse. These properties change greatly in comparison with the room temperature solid metal. The electron temperature and pressure profiles significantly depend on these properties in bulk laser...

Full description

Saved in:
Bibliographic Details
Published in:Journal of physics. Conference series 2016-11, Vol.774 (1), p.12103
Main Authors: Petrov, Yu V, Migdal, K P, Knyazev, D V, Inogamov, N A, Levashov, P R
Format: Article
Language:English
Subjects:
Boltzmann transport equation
Copper
Electron energy
Femtosecond pulses
First principles
Laser beam heating
Laser targets
Mathematical models
Physics
Plane waves
Rarefaction
Relaxation time
Room temperature
Subsystems
Temperature
Thermal conductivity
Transport properties
Wave functions
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We have investigated transport properties of an electron subsystem of copper heated by a femtosecond laser pulse. These properties change greatly in comparison with the room temperature solid metal. The electron temperature and pressure profiles significantly depend on these properties in bulk laser targets according to the two-temperature (2T) model. These profiles at the 2T stage are responsible for shock and rarefaction waves' formation. We have developed the analytical model of electroconductivity and heat conductivity of copper which takes into account changes of density, electron and ion temperatures. The model is based on the solution of the Boltzmann equation in the relaxation time approximation for consideration of electron collisions. Also we have carried out the first-principles calculations using the Kubo-Greenwood theory, methods of pseudopotential and linear augmented plane waves which are necessary to evaluate electron wavefunctions. We have provided the check of convergence of all parameters of our first-principles calculations. The results of our analytical model for electro- and heat conductivities are in good agreement with the data obtained using the linearized augmented plane wave (LAPW) method.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/774/1/012103