Electron-phonon coupling and hot electron thermalization in titanium nitride
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Supporting information
Published version
Author(s)
Dal Forno, Stefano
Lischner, Johannes
Type
Journal Article
Abstract
We have studied the thermalization of hot carriers in both pristine and defective
titanium nitride (TiN) using a two-temperature model. All parameters of this model,
including the electron-phonon coupling parameter, were obtained from rst-principles
density-functional theory calculations. The virtual crystal approximation was used to
describe defective systems. We nd that thermalization of hot carriers occurs on much
faster time scales than in gold as a consequence of the signi cantly stronger electronphonon coupling in TiN. Speci cally, the largest thermalization times, on the order of
200 femtoseconds, are found in TiN with nitrogen vacancies for electron temperatures
around 4000 K.
titanium nitride (TiN) using a two-temperature model. All parameters of this model,
including the electron-phonon coupling parameter, were obtained from rst-principles
density-functional theory calculations. The virtual crystal approximation was used to
describe defective systems. We nd that thermalization of hot carriers occurs on much
faster time scales than in gold as a consequence of the signi cantly stronger electronphonon coupling in TiN. Speci cally, the largest thermalization times, on the order of
200 femtoseconds, are found in TiN with nitrogen vacancies for electron temperatures
around 4000 K.
Date Issued
2019-11-21
Date Acceptance
2019-11-05
Citation
Physical Review Materials, 2019, 3 (11)
ISSN
2475-9953
Publisher
American Physical Society
Journal / Book Title
Physical Review Materials
Volume
3
Issue
11
Copyright Statement
© 2019 American Physical Society. Published in Stefano Dal Forno and Johannes Lischner, Electron-phonon coupling and hot electron thermalization in titanium nitride, Phys. Rev. Materials 3, 115203, https://doi.org/10.1103/PhysRevMaterials.3.115203 .
Sponsor
Engineering & Physical Science Research Council (EPSRC)
The Royal Society
Grant Number
EP/N005244/1
URF\R\191004
Publication Status
Published
Article Number
115203