Electron-Phonon Coupling and Electron Heat Capacity in Metals at High Electron Temperatures

In the table below you can find files with tabulated data on the temperature dependences of the electron heat capacity and the electron-phonon coupling factor, given for a range of electron temperatures that are typically realized in femtosecond laser processing of materials. The data is calculated for several metals based on their electron density of states, taking into account the effect of thermal excitation of electrons located below the Fermi level. You can find detailed information on the method used in the calculations and discussion of the results in the references listed below.

Material el-ph coupling, G(Te) Electron heat capacity, Ce(Te) Chemical potential, μ(Te)-εF
Gold G_Au.dat Ce_Au.dat mu_Au.dat
Nickel G_Ni.dat Ce_Ni.dat mu_Ni.dat
Copper G_Cu.dat Ce_Cu.dat mu_Cu.dat
Platinum G_Pt.dat Ce_Pt.dat mu_Pt.dat
Silver G_Ag.dat Ce_Ag.dat mu_Ag.dat
Aluminum G_Al.dat Ce_Al.dat mu_Al.dat
Tungsten G_W.dat Ce_W.dat mu_W.dat
Molybdenum G_Mo.dat Ce_Mo.dat mu_Mo.dat
Titanium G_Ti.dat Ce_Ti.dat mu_Ti.dat
Iron (bcc) G_Fe_BCC.dat Ce_Fe_BCC.dat mu_Fe_BCC.dat
Iron (fcc) G_Fe_FCC.dat Ce_Fe_FCC.dat mu_Fe_FCC.dat

The first column is the electron temperature in units of 104K.
G(Te), Ce(Te), and μ(Te)-εF are shown in the second column in units of 1017Wm-3K-1, 105Jm-3K-1, and eV, respectively.

If you use this data in your calculations or in interpretation of your experimental data, we would be interested to learn about your results - please e-mail Zhibin Lin or Leonid Zhigilei.

References:

Z. Lin, L. V. Zhigilei, and V. Celli, Electron-phonon coupling and electron heat capacity of metals under conditions of strong electron-phonon nonequilibrium, Phys. Rev. B 77, 075133, 2008.
Full Text: PDF (508 kB)

Z. Lin and L. V. Zhigilei, The role of thermal excitation of d band electrons in ultrafast laser interaction with noble (Cu) and transition (Pt) metals, Proceedings of the International Conference on Integration and Commercialization of Micro and Nano-systems (MicroNanoChina07), ASME paper MNC2007-21076, 2007.
Full Text: PDF (135 kB)

Z. Lin and L. V. Zhigilei, Temperature dependences of the electron-phonon coupling, electron heat capacity and thermal conductivity in Ni under femtosecond laser irradiation, Appl. Surf. Sci. 253, 6295-6300, 2007.
Full Text: PDF (297 kB)

Z. Lin and L. V. Zhigilei, Thermal excitation of d band electrons in Au: implications for laser-induced phase transformations, High-Power Laser Ablation VI, edited by C. R. Phipps, Proc. SPIE 6261, 62610U, 2006.
Full Text: PDF (683 kB)

This material is based upon work supported by the National Science Foundation under Grant No. 0348503.
 Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation.

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