Ab Initio Theory of Coherent Laser-Induced Magnetization in Metals

Berritta, Marco; Mondal, Ritwik; Carva, Karel; Oppeneer, Peter M.

Ab Initio Theory of Coherent Laser-Induced Magnetization in Metals

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Datum

2016

Autor:innen

Berritta, Marco

Mondal, Ritwik

Carva, Karel

Oppeneer, Peter M.

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Physical Review Letters. 2016, 117(13), 137203. ISSN 0031-9007. eISSN 1079-7114. Available under: doi: 10.1103/PhysRevLett.117.137203

Zusammenfassung

We present the first materials specific ab initio theory of the magnetization induced by circularly polarized laser light in metals. Our calculations are based on nonlinear density matrix theory and include the effect of absorption. We show that the induced magnetization, commonly referred to as inverse Faraday effect, is strongly materials and frequency dependent, and demonstrate the existence of both spin and orbital induced magnetizations which exhibit a surprisingly different behavior. We show that for nonmagnetic metals (such as Cu, Au, Pd, Pt) and antiferromagnetic metals the induced magnetization is antisymmetric in the light's helicity, whereas for ferromagnetic metals (Fe, Co, Ni, FePt) the imparted magnetization is only asymmetric in the helicity. We compute effective optomagnetic fields that correspond to the induced magnetizations and provide guidelines for achieving all-optical helicity-dependent switching.

Fachgebiet (DDC)

530 Physik

Zitieren

ISO 690

BERRITTA, Marco, Ritwik MONDAL, Karel CARVA, Peter M. OPPENEER, 2016. Ab Initio Theory of Coherent Laser-Induced Magnetization in Metals. In: Physical Review Letters. 2016, 117(13), 137203. ISSN 0031-9007. eISSN 1079-7114. Available under: doi: 10.1103/PhysRevLett.117.137203

BibTex

@article{Berritta2016-09-23AbIni-46245,
  year={2016},
  doi={10.1103/PhysRevLett.117.137203},
  title={Ab Initio Theory of Coherent Laser-Induced Magnetization in Metals},
  number={13},
  volume={117},
  issn={0031-9007},
  journal={Physical Review Letters},
  author={Berritta, Marco and Mondal, Ritwik and Carva, Karel and Oppeneer, Peter M.},
  note={Article Number: 137203}
}

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    <dcterms:abstract xml:lang="eng">We present the first materials specific ab initio theory of the magnetization induced by circularly polarized laser light in metals. Our calculations are based on nonlinear density matrix theory and include the effect of absorption. We show that the induced magnetization, commonly referred to as inverse Faraday effect, is strongly materials and frequency dependent, and demonstrate the existence of both spin and orbital induced magnetizations which exhibit a surprisingly different behavior. We show that for nonmagnetic metals (such as Cu, Au, Pd, Pt) and antiferromagnetic metals the induced magnetization is antisymmetric in the light's helicity, whereas for ferromagnetic metals (Fe, Co, Ni, FePt) the imparted magnetization is only asymmetric in the helicity. We compute effective optomagnetic fields that correspond to the induced magnetizations and provide guidelines for achieving all-optical helicity-dependent switching.</dcterms:abstract>
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