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On the possibility of using X-ray Compton scattering to study magnetoelectrical properties of crystals.
Collins, S P; Laundy, D; Connolley, T; van der Laan, G; Fabrizi, F; Janssen, O; Cooper, M J; Ebert, H; Mankovsky, S.
Afiliación
  • Collins SP; Diamond Light Source Ltd, Harwell Science and Innovation Campus, Didcot, OX11 0DE, England.
  • Laundy D; Diamond Light Source Ltd, Harwell Science and Innovation Campus, Didcot, OX11 0DE, England.
  • Connolley T; Diamond Light Source Ltd, Harwell Science and Innovation Campus, Didcot, OX11 0DE, England.
  • van der Laan G; Diamond Light Source Ltd, Harwell Science and Innovation Campus, Didcot, OX11 0DE, England.
  • Fabrizi F; Diamond Light Source Ltd, Harwell Science and Innovation Campus, Didcot, OX11 0DE, England.
  • Janssen O; Department of Physics, New York University, New York, NY 10003, USA.
  • Cooper MJ; Department of Physics, University of Warwick, CV4 7AL, England.
  • Ebert H; Universität München, Department Chemie, Haus E2.033, Butenandtstrasse 5-13, D-81377 München, Germany.
  • Mankovsky S; Universität München, Department Chemie, Haus E2.033, Butenandtstrasse 5-13, D-81377 München, Germany.
Acta Crystallogr A Found Adv ; 72(Pt 2): 197-205, 2016 Mar.
Article en En | MEDLINE | ID: mdl-26919371
This paper discusses the possibility of using Compton scattering--an inelastic X-ray scattering process that yields a projection of the electron momentum density--to probe magnetoelectrical properties. It is shown that an antisymmetric component of the momentum density is a unique fingerprint of such time- and parity-odd physics. It is argued that polar ferromagnets are ideal candidates to demonstrate this phenomenon and the first experimental results are shown, on a single-domain crystal of GaFeO3. The measured antisymmetric Compton profile is very small (≃ 10(-5) of the symmetric part) and of the same order of magnitude as the statistical errors. Relativistic first-principles simulations of the antisymmetric Compton profile are presented and it is shown that, while the effect is indeed predicted by theory, and scales with the size of the valence spin-orbit interaction, its magnitude is significantly overestimated. The paper outlines some important constraints on the properties of the antisymmetric Compton profile arising from the underlying crystallographic symmetry of the sample.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Acta Crystallogr A Found Adv Año: 2016 Tipo del documento: Article País de afiliación: Reino Unido Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Acta Crystallogr A Found Adv Año: 2016 Tipo del documento: Article País de afiliación: Reino Unido Pais de publicación: Estados Unidos