Laser-Induced Demagnetization at Ultrashort Time Scales: Predictions of TDDFT

K. Krieger, J. K. Dewhurst, P. Elliott, S. Sharma*, E. K.U. Gross

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

163 Scopus citations

Abstract

Time-dependent density functional theory (TDDFT) is implemented in an all electron solid-state code for the case of fully unconstrained noncollinear spins. We use this to study intense, short, laser pulse-induced demagnetization in bulk Fe, Co, Ni and find that demagnetization can take place on time scales of <20 fs. It is demonstrated that this form of demagnetization is a two-step process: excitation of a fraction of electrons followed by spin-flip transitions mediated by spin-orbit coupling of the remaining localized electrons. We further show that it is possible to control the moment loss by tunable laser parameters, including frequency, duration, and intensity.

Original languageAmerican English
Pages (from-to)4870-4874
Number of pages5
JournalJournal of Chemical Theory and Computation
Volume11
Issue number10
DOIs
StatePublished - 26 Aug 2015
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2015 American Chemical Society.

Fingerprint

Dive into the research topics of 'Laser-Induced Demagnetization at Ultrashort Time Scales: Predictions of TDDFT'. Together they form a unique fingerprint.

Cite this