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Titre :
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Contributions of inter- and intraband excitations to electron heat capacity and electron-phonon coupling in noble metals
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Auteurs :
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Patrick E. Hopkins, Auteur
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Type de document :
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Article : texte imprimé
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Dans :
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Journal of heat transfer (Vol. 132 N° 1, Janvier 2010)
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Article en page(s) :
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pp. [014504-1/4]
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Note générale :
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Physique
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Langues :
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Anglais
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Index. décimale :
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536 (Chaleur. Thermodynamique)
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Tags :
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Intraband transition Interband Electronphonon coupling factor Short pulsed laser heating Electronic band structure
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Résumé :
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This work examines the effects of photonically induced interband excitations from the d-band to states at the Fermi energy on thermophysical properties in noble metals. The change in the electron population in the d-band and the conduction band causes a change in electron heat capacity and electron-phonon coupling factor, which in turn impacts the evolution of the temperature after pulse absorption and electron thermalization. Expressions for heat capacity and electron-phonon coupling factor are derived for electrons undergoing both inter- and intraband transitions. In noble metals, due to the large d-band to Fermi energy separation, the contributions to electron heat capacity and electron-phonon coupling factor of intra- and interband transitions can be separated. At high absorbed laser fluences and pulse energies greater than the interband transition threshold, the interband and intraband contributions to thermophysical properties differ.
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DEWEY :
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536
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ISSN :
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0022-1481
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En ligne :
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http://asmedl.aip.org/vsearch/servlet/VerityServlet?KEY=JHTRAO&ONLINE=YES&smode=strresults&sort=chron&maxdisp=25&threshold=0&pjournals=JBENDY&pjournals=JHTRAO&pyears=2010&possible1zone=article&fromyear=2010&frommonth=Jan&fromvolume=132&fromissue=1&OUTLOG=
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