Thickness-dependent electron momentum relaxation times in iron films

Krewer KL, Zhang W, Arabski J, Schmerber G, Beaurepaire E, Bonn M, Turchinovich D (2020)
APPLIED PHYSICS LETTERS 116(10): 102406.

Zeitschriftenaufsatz | E-Veröff. vor dem Druck | Englisch
 
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Autor*in
Krewer, K. L.; Zhang, WentaoUniBi; Arabski, J.; Schmerber, G.; Beaurepaire, E.; Bonn, M.; Turchinovich, DmitryUniBi
Abstract / Bemerkung
Terahertz time-domain conductivity measurements in 2-100nm thick iron films resolve the femtosecond time delay between the applied electric fields and the resulting currents. This current response time decreases from 29 fs for the thickest films to 7 fs for the thinnest films. The macroscopic response time is not strictly proportional to the conductivity. This excludes the existence of a single relaxation time universal for all conduction electrons. We must assume a distribution of microscopic momentum relaxation times. The macroscopic response time depends on the average and variation of this distribution; the observed deviation between the response time and conductivity scaling corresponds to the scaling of the variation. The variation of microscopic relaxation times depends on the film thickness because electrons with different relaxation times are affected differently by the confinement since they have different mean free paths.
Erscheinungsjahr
2020
Zeitschriftentitel
APPLIED PHYSICS LETTERS
Band
116
Ausgabe
10
Art.-Nr.
102406
ISSN
0003-6951
eISSN
1077-3118
Page URI
https://pub.uni-bielefeld.de/record/2942731

Zitieren

Krewer KL, Zhang W, Arabski J, et al. Thickness-dependent electron momentum relaxation times in iron films. APPLIED PHYSICS LETTERS. 2020;116(10): 102406.
Krewer, K. L., Zhang, W., Arabski, J., Schmerber, G., Beaurepaire, E., Bonn, M., & Turchinovich, D. (2020). Thickness-dependent electron momentum relaxation times in iron films. APPLIED PHYSICS LETTERS, 116(10), 102406. doi:10.1063/1.5142479
Krewer, K. L., Zhang, W., Arabski, J., Schmerber, G., Beaurepaire, E., Bonn, M., and Turchinovich, D. (2020). Thickness-dependent electron momentum relaxation times in iron films. APPLIED PHYSICS LETTERS 116:102406.
Krewer, K.L., et al., 2020. Thickness-dependent electron momentum relaxation times in iron films. APPLIED PHYSICS LETTERS, 116(10): 102406.
K.L. Krewer, et al., “Thickness-dependent electron momentum relaxation times in iron films”, APPLIED PHYSICS LETTERS, vol. 116, 2020, : 102406.
Krewer, K.L., Zhang, W., Arabski, J., Schmerber, G., Beaurepaire, E., Bonn, M., Turchinovich, D.: Thickness-dependent electron momentum relaxation times in iron films. APPLIED PHYSICS LETTERS. 116, : 102406 (2020).
Krewer, K. L., Zhang, Wentao, Arabski, J., Schmerber, G., Beaurepaire, E., Bonn, M., and Turchinovich, Dmitry. “Thickness-dependent electron momentum relaxation times in iron films”. APPLIED PHYSICS LETTERS 116.10 (2020): 102406.

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