期刊
PHYSICAL REVIEW MATERIALS
卷 3, 期 11, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevMaterials.3.115203
关键词
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资金
- EPRSC [EP/N005244/1]
- Thomas Young Centre [TYC-101]
- EPSRC [EP/L000202]
- EPSRC [EP/N005244/1] Funding Source: UKRI
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 first-principles density-functional theory calculations. The virtual-crystal approximation was used to describe defective systems. We find that thermalization of hot carriers occurs on much faster timescales than in gold as a consequence of the significantly stronger electron-phonon coupling in TiN. Specifically, the largest thermalization times, on the order of 200 femtoseconds, are found in TiN with nitrogen vacancies for electron temperatures around 4000 K.
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