%0 Journal Article %T First-principles calculations of heat capacities of ultrafast laser-excited electrons in metals %+ Laboratoire Hubert Curien (LHC) %+ DAM Île-de-France (DAM/DIF) %A Bévillon, Emile %A Colombier, Jean-Philippe %A Recoules, Vanina %A Stoian, Razvan %< avec comité de lecture %@ 0169-4332 %J Applied Surface Science %I Elsevier %V 336 %P 79–84 %8 2015-05-01 %D 2015 %Z 1503.06943 %R 10.1016/j.apsusc.2014.09.146 %K Electronic Heat Capacities %K First-Principles calculations %K Femtosecond laser-excited electrons %K Ultrashort laser %Z Physics [physics]/Condensed Matter [cond-mat] %Z Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci]Journal articles %X Ultrafast laser excitation can induce fast increases of the electronic subsystem temperature. The subsequent electronic evolutions in terms of band structure and energy distribution can determine the change of several thermodynamic properties, including one essential for energy deposition; the electronic heat capacity. Using density functional calculations performed at finite electronic temperatures, the electronic heat capacities dependent on electronic temperatures are obtained for a series of metals, including free electron like, transition and noble metals. The effect of exchange and correlation functionals and the presence of semicore electrons on electronic heat capacities are first evaluated and found to be negligible in most cases. Then, we tested the validity of the free electron approaches, varying the number of free electrons per atom. This shows that only simple metals can be correctly fitted with these approaches. For transition metals, the presence of localized d electrons produces a strong deviation toward high energies of the electronic heat capacities, implying that more energy is needed to thermally excite them, compared to free sp electrons. This is attributed to collective excitation effects strengthened by a change of the electronic screening at high temperature. %G English %Z ANR project DYLIPSS(ANR-12-IS04-0002-01) %Z LABEX MANUTECH-SISE (ANR-10-LABX-0075) of the Université de Lyon %Z within the program “Investissements d’Avenir” (ANR-11-IDEX-0007) operated by theFrench National Research Agency (ANR). %2 https://ujm.hal.science/ujm-01134167/document %2 https://ujm.hal.science/ujm-01134167/file/Ce-ass-v4.pdf %L ujm-01134167 %U https://ujm.hal.science/ujm-01134167 %~ UNIV-ST-ETIENNE %~ CEA %~ IOGS %~ CNRS %~ LAHC %~ PARISTECH %~ DAM %~ GENCI %~ MANUTECH-SISE %~ MANUTECH-SISE_A4 %~ UDL %~ ANR