Umklapp Electron-Phonon Scattering in the Low-Temperature Resistivity of Polyvalent Metals

1972 ◽  
Vol 6 (12) ◽  
pp. 4466-4482 ◽  
Author(s):  
W. E. Lawrence ◽  
J. W. Wilkins
Keyword(s):  
Low Temperature ◽  
Phonon Scattering ◽  
Temperature Resistivity ◽  
Electron Phonon Scattering

Electron-phonon Scattering Effect on Strained Si Nanowire FETs at Low Temperature

2019 ◽  
Vol 25 (6) ◽  
pp. 439-443
Author(s):  
Ikushin Tsuchida ◽  
Aya Seike ◽  
Hajime Takai ◽  
Junichi Masuda ◽  
Daisuke Kosemura ◽  
...  
Keyword(s):  
Low Temperature ◽  
Phonon Scattering ◽  
Strained Si ◽  
Si Nanowire ◽  
Scattering Effect ◽  
Electron Phonon Scattering

scholarly journals Thermoelectric Power of Gd4(Co-A)3 Compounds (A = Cu, Pt)

2012 ◽  
Vol 730-732 ◽  
pp. 159-163
Author(s):  
Teresa M. Seixas ◽  
Manuel A. Salgueiro da Silva ◽  
Hans F. Braun ◽  
Georg Eska
Keyword(s):  
Low Temperature ◽  
Thermoelectric Power ◽  
Phonon Scattering ◽  
Positive Maximum ◽  
Spin Disorder ◽  
Structure Changes ◽  
Power Measurements ◽  
Electron Band Structure ◽  
Electron Phonon Scattering

We report on a comparative study of thermoelectric power measurements (S(T)) in ferrimagnetic Gd4(Co1-xAx)3 compounds with A = Cu, Pt, in the temperature range 8 K – 300 K. Whereas in Gd4Co3S(T) is always negative, for x > 0 the substitution of Co for Cu/Pt gives rise to the appearance of a low temperature positive maximum in S(T) at around 30 K. Based on our previous study of Gd4(Co1-xCux)3 compounds, we argue that this maximum in S(T) originates from electron-magnon scattering and is sensitive to electron band structure changes resulting from the substitution of Co for Cu/Pt and the accompanying reduction in the ratio between the electron-magnon and the electron-phonon scattering strengths. The decreasing role of Co 3d electrons with the progressive substitution of Co for Cu/Pt, evidenced by a strong reduction in the spin disorder resistivity and the Co magnetic moment, is seen to be crucial for the existence of such low temperature maximum in S(T) for x > 0. It is seen that the substitution of Co for Pt leads to higher values of the amplitude and temperature of the positive maximum in S(T) than the substitution of Co for Cu.

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