Browsing Research Articles (Physics) by Author "Barnas, J."

Browsing Research Articles (Physics) by Author "Barnas, J."

Sort by: Order: Results:

  • Elementary excitations in Si, Ge, and diamond time reversal affected 
    Kunert, Herbert W.; Machatine, Augusto Gonçalo Jose; Malherbe, Johan B.; Barnas, J.; Hoffmann, A.; Wagner, M.R. (Elsevier, 2008)
    The Space Symmetry and the Time Reversal Symmetry of vibrational modes in Si, Ge and diamond are investigated. Using Space Symmetry we have derived the Lattice Mode Representation. Reducing it onto phonon species we obtain ...
  • Infrared absorption, multiphonon processes and time reversal effect on Si and Ge band structure 
    Kunert, Herbert W.; Machatine, Augusto Gonçalo Jose; Malherbe, Johan B.; Barnas, J.; Hoffmann, A.; Wagner, M.R. (Elsevier, 2008)
    We have examined the effect of Time Reversal Symmetry (TRS) on vibrational modes and on the electronic band structure of Si and Ge. Most of the primary non-interacting modes are not affected by TRS. Only phonons originating ...
  • Thermoelectric effects in spin valves based on layered magnetic structures 
    Kunert, Herbert W.; Barnas, J. (Polish Academy of Sciences, 2017)
    General aspects of thermoelectric effects in spin valves consisting of two magnetic layers separated by a nonmagnetic spacing layer are considered, with the main focus on the spin Seebeck effects. The Seebeck and spin Seebeck ...