3d spin-orbit photoemission spectrum of nonferromagnetic materials: The test cases of CoO and Cu

@article{ ISI:000177969800045,
Author = {Ghiringhelli, G and Tjeng, LH and Tanaka, A and Tjernberg, O and
   Mizokawa, T and de Boer, JL and Brookes, NB},
Title = {{3d spin-orbit photoemission spectrum of nonferromagnetic materials: The
   test cases of CoO and Cu}},
Journal = {{PHYSICAL REVIEW B}},
Year = {{2002}},
Volume = {{66}},
Number = {{7}},
Month = {{AUG 15}},
Abstract = {{The x-ray photoemission spectrum of the valence states of 3d
   transition-metal systems is spin polarized when using circularly
   polarized photons. The integral of the spin-orbit spectrum is
   proportional to the expectation value of the angular part of the 3d
   spin-orbit operator in the initial state. We show that this quantity can
   be used to get an estimate of the atomic orbital moment. While the
   measurement is sensitive to the magnetization axis, it does not require
   a net macroscopic magnetization nor the presence of a long-range
   magnetic order, and is therefore suitable for any transition-metal
   systems being antiferromagnetic or paramagnetic or magnetically
   disordered. In the case of full 3d shell the integral of the spin-orbit
   spectrum is zero, but the spectral shape can give a direct estimate of
   the 3d spin-orbit energy splitting DeltaE(SO). We have used Cu and CoO
   to experimentally test this technique. As expected Cu provides a
   vanishing result for <L-z>, whereas for Co2+ in CoO we find <L-z>=1.36h
   at 0 K. On the other hand we find DeltaE(SO)similar or equal to280 meV
   for Cu.}},
Publisher = {{AMER PHYSICAL SOC}},
Address = {{ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA}},
Type = {{Article}},
Language = {{English}},
Affiliation = {{Ghiringhelli, G (Corresponding Author), European Synchrotron Radiat Facil, Boite Postale 220, F-38043 Grenoble, France.
   European Synchrotron Radiat Facil, F-38043 Grenoble, France.
   Politecn Milan, Dipartimento Fis, INFM, I-20133 Milan, Italy.
   Univ Groningen, MSC, Solid State Phys Lab, NL-9747 AG Groningen, Netherlands.
   Univ Cologne, Inst Phys 2, D-50937 Cologne, Germany.
   Hiroshima Univ, ADSM, Dept Quantum Matter, Higashihiroshima 7398530, Japan.
   Royal Inst Technol, S-16440 Kista, Sweden.
   Univ Tokyo, Dept Complex Sci & Engn, Tokyo 1130033, Japan.
   Univ Groningen, MSC, Chem Phys Lab, NL-9747 AG Groningen, Netherlands.}},
DOI = {{10.1103/PhysRevB.66.075101}},
Article-Number = {{075101}},
ISSN = {{2469-9950}},
EISSN = {{2469-9969}},
Keywords-Plus = {{MAGNETIC CIRCULAR-DICHROISM; TRANSITION-METAL OXIDES; VALENCE STATES;
   CU(111); FE; SUPERCONDUCTIVITY; NANOSTRUCTURES; POLARIZATION; AU(111);
   SR2RUO4}},
Research-Areas = {{Materials Science; Physics}},
Web-of-Science-Categories  = {{Materials Science, Multidisciplinary; Physics, Applied; Physics,
   Condensed Matter}},
ResearcherID-Numbers = {{Brookes, Nicholas B/C-6718-2019
   Mizokawa, Takashi/E-3302-2015
   Ghiringhelli, Giacomo/D-1159-2014
   Tjeng, Liu Hao/B-8607-2019
   Tanaka, Arata/S-4466-2018
   }},
ORCID-Numbers = {{Brookes, Nicholas B/0000-0002-1342-9530
   Mizokawa, Takashi/0000-0002-7682-2348
   Ghiringhelli, Giacomo/0000-0003-0867-7748
   Tjeng, Liu Hao/0000-0002-0595-9312
   Tanaka, Arata/0000-0001-8301-8502
   Tjernberg, Oscar/0000-0001-8669-6886}},
Number-of-Cited-References = {{46}},
Times-Cited = {{36}},
Usage-Count-Last-180-days = {{0}},
Usage-Count-Since-2013 = {{3}},
Journal-ISO = {{Phys. Rev. B}},
Doc-Delivery-Number = {{593AV}},
Unique-ID = {{ISI:000177969800045}},
DA = {{2020-12-22}},
}