Sterzi, A., Crepaldi, A., Cilento, F., Manzoni, G., Frantzeskakis, E., Zacchigna, M., van Heumen, E., Huang, Y. K., Golden, M. S. and Parmigiani, F. (2016). SmB6 electron-phonon coupling constant from time- and angle-resolved photoelectron spectroscopy. Phys. Rev. B, 94 (8). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2469-9969

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Abstract

SmB6 is a mixed valence Kondo system resulting from the hybridization between localized f electrons and delocalized d electrons. We have investigated its out-of-equilibrium electron dynamics by means of time- and angle-resolved photoelectron spectroscopy. The transient electronic population above the Fermi level can be described by a time-dependent Fermi-Dirac distribution. By solving a two-temperature model that well reproduces the relaxation dynamics of the effective electronic temperature, we estimate the electron-phonon coupling constant lambda to range from 0.13 +/- 0.03 to 0.04 +/- 0.01. These extremes are obtained assuming a coupling of the electrons with either a phonon mode at 10 or 19 meV. A realistic value of the average phonon energy will give an actual value of lambda within this range. Our results provide an experimental report on the material electron-phonon coupling, contributing to both the electronic transport and the macroscopic thermodynamic properties of SmB6.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Sterzi, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Crepaldi, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Cilento, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Manzoni, G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Frantzeskakis, E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Zacchigna, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
van Heumen, E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Huang, Y. K.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Golden, M. S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Parmigiani, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-266271
DOI: 10.1103/PhysRevB.94.081111
Journal or Publication Title: Phys. Rev. B
Volume: 94
Number: 8
Date: 2016
Publisher: AMER PHYSICAL SOC
Place of Publication: COLLEGE PK
ISSN: 2469-9969
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
SURFACE; THERMALIZATION; DYNAMICSMultiple languages
Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed MatterMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/26627

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