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Publications in Scientific Journals:

A. Vernes, P. Weinberger:
"Formally linear response theory of pump-probe experiments";
Physical Review B, 71 (2005), 165108-1 - 165108-12.



English abstract:
By linearizing the density of both the pump- and probe-excited states and neglecting the overlap between femtosecond laser pulses, the Kubo response theory is extended to describe pump-probe experiments. The main advantages of this response scheme is that although second order responses are included, it formally remains a linear theory and therefore all obtained expressions can be implemented straightforwardly within any standard band structure method, e.g., based on a Green's function approach. In particular, even the time-dependent zeroth order dynamic conductivity as obtained by means of the spin-polarized relativistic screened Korringa-Kohn-Rostoker method for fcc Ni(100) predicts a relatively slow demagnetization process over 100 fs after the impact of the probe pulse, which is in reasonably good agreement with available experimental data. 2005 The American Physical Society


Online library catalogue of the TU Vienna:
http://aleph.ub.tuwien.ac.at/F?base=tuw01&func=find-c&ccl_term=AC05937886

Electronic version of the publication:
http://link.aps.org/abstract/PRB/v71/e165108


Created from the Publication Database of the Vienna University of Technology.