Orbital superexchange and crystal field simultaneously at play in YVO3: Resonant inelastic x-ray scattering at the V L edge and the O K edge

@article{ ISI:000327159700001,
Author = {Benckiser, E. and Fels, L. and Ghiringhelli, G. and Sala, M. Moretti and
   Schmitt, T. and Schlappa, J. and Strocov, V. N. and Mufti, N. and Blake,
   G. R. and Nugroho, A. A. and Palstra, T. T. M. and Haverkort, M. W. and
   Wohlfeld, K. and Grueninger, M.},
Title = {{Orbital superexchange and crystal field simultaneously at play in YVO3:
   Resonant inelastic x-ray scattering at the V L edge and the O K edge}},
Journal = {{PHYSICAL REVIEW B}},
Year = {{2013}},
Volume = {{88}},
Number = {{20}},
Month = {{NOV 13}},
Abstract = {{We report on the observation of orbital excitations in YVO3 by means of
   resonant inelastic x-ray scattering (RIXS) at energies across the
   vanadium L-3 and oxygen K absorption edges. At the V L3 edge, we are
   able to resolve the full spectrum of orbital excitations up to 5 eV. In
   order to unravel the effect of superexchange interactions and the
   crystal field on the orbital excitations, we analyzed the energy and
   temperature dependence of the intra-t(2g) excitations at 0.1-0.2 eV in
   detail. While these results suggest a dominant influence of the crystal
   field, peak shifts of about 13-20 meV observed as a function of the
   transferred momentum q parallel to a reflect a finite dispersion of the
   orbital excitations. This is puzzling since theoretical models based on
   superexchange interactions predict a dispersion only for q parallel to
   c. Furthermore, we demonstrate that RIXS at the O K edge is very
   sensitive to intersite excitations. At the O K edge, we observe
   excitations across the Mott-Hubbard gap and an additional feature at 0.4
   eV, which we attribute to two-orbiton scattering, i.e., an exchange of
   orbitals between adjacent sites. Altogether, our results indicate that
   both superexchange interactions and the crystal field are important for
   a quantitative understanding of the orbital excitations in YVO3.}},
Publisher = {{AMER PHYSICAL SOC}},
Address = {{ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA}},
Type = {{Article}},
Language = {{English}},
Affiliation = {{Benckiser, E (Corresponding Author), Univ Cologne, Inst Phys 2, Zulpicher Str 77, D-50937 Cologne, Germany.
   Benckiser, E.; Fels, L.; Grueninger, M., Univ Cologne, Inst Phys 2, D-50937 Cologne, Germany.
   Benckiser, E.; Haverkort, M. W., Max Planck Inst Solid State Res, D-70569 Stuttgart, Germany.
   Ghiringhelli, G.; Sala, M. Moretti, Politecn Milan, Dipartimento Fis, CNR SPIN, I-20133 Milan, Italy.
   Sala, M. Moretti, European Synchrotron Radiat Facil, F-38043 Grenoble, France.
   Schmitt, T.; Schlappa, J.; Strocov, V. N., Paul Scherrer Inst, Swiss Light Source, CH-5232 Villigen, Switzerland.
   Schlappa, J., BESSY II, Inst Methoden & Instrumentierung Synchrotronstrah, D-12489 Berlin, Germany.
   Mufti, N.; Blake, G. R.; Nugroho, A. A.; Palstra, T. T. M., Univ Groningen, Zernike Inst Adv Mat, Dept Chem Phys, NL-9747 AG Groningen, Netherlands.
   Mufti, N., State Univ Malang, Dept Phys, Malang 65145, Indonesia.
   Nugroho, A. A., Inst Teknol Bandung, Jurusan Fis, Bandung 40132, Indonesia.
   Haverkort, M. W., Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada.
   Wohlfeld, K., IFW Dresden, Inst Theoret Solid State Phys, D-01069 Dresden, Germany.
   Wohlfeld, K., Stanford Univ, Stanford Inst Mat & Energy Sci, Menlo Pk, CA 94025 USA.
   Wohlfeld, K., SLAC Natl Accelerator Lab, Menlo Pk, CA 94025 USA.}},
DOI = {{10.1103/PhysRevB.88.205115}},
Article-Number = {{205115}},
ISSN = {{2469-9950}},
EISSN = {{2469-9969}},
Keywords-Plus = {{TRANSITION-METAL OXIDES; EMISSION-SPECTROSCOPY; ELECTRONIC-STRUCTURE;
   SPIN; EXCITATIONS; PHYSICS; STATES}},
Research-Areas = {{Materials Science; Physics}},
Web-of-Science-Categories  = {{Materials Science, Multidisciplinary; Physics, Applied; Physics,
   Condensed Matter}},
Author-Email = {{e.benckiser@fkf.mpg.de
   grueninger@ph2.uni-koeln.de}},
ResearcherID-Numbers = {{Haverkort, Maurits W./D-2319-2009
   Institute, Zernike/W-7033-2019
   Palstra, Thomas TM/K-1961-2013
   Moretti, Marco/AAF-9255-2019
   Benckiser, Eva/R-6973-2019
   Ghiringhelli, Giacomo/D-1159-2014
   Nugroho, Agustinus Agung/E-5977-2010
   Wohlfeld, Krzysztof/Q-2351-2019
   Sala, Marco Moretti/H-1034-2014
   Wohlfeld, Krzysztof/B-4489-2014
   Schmitt, Thorsten/A-7025-2010
   Mufti, Nandang/F-1603-2010
   Mufti, Nandang/O-7971-2019
   }},
ORCID-Numbers = {{Haverkort, Maurits W./0000-0002-7216-3146
   Palstra, Thomas TM/0000-0001-5239-3115
   Moretti, Marco/0000-0002-9744-9976
   Benckiser, Eva/0000-0002-7638-2282
   Ghiringhelli, Giacomo/0000-0003-0867-7748
   Nugroho, Agustinus Agung/0000-0002-1785-4008
   Wohlfeld, Krzysztof/0000-0002-6524-8264
   Sala, Marco Moretti/0000-0002-9744-9976
   Wohlfeld, Krzysztof/0000-0002-6524-8264
   Mufti, Nandang/0000-0002-8260-8495
   Mufti, Nandang/0000-0002-8260-8495
   Blake, Graeme/0000-0001-9531-7649}},
Funding-Acknowledgement = {{DFGGerman Research Foundation (DFG) {[}SFB 608]; U.S. Department of
   Energy, Office of Basic Energy Sciences, Division of Materials Science
   and EngineeringUnited States Department of Energy (DOE)
   {[}DE-AC02-76SF00515]; Alexander von Humboldt FoundationAlexander von
   Humboldt Foundation}},
Funding-Text = {{The XAS and RIXS measurements were performed at the ADRESS beamline of
   the Swiss Light Source using the SAXES instrument jointly built by Paul
   Scherrer Institut (Switzerland), Politecnico di Milano (Italy), and
   Ecole polytechnique federale de Lausanne (Switzerland). The authors
   thank N. Hollmann, L.-H. Tjeng, and L. Braicovich for fruitful
   discussions. This work was supported by the DFG via SFB 608 and
   partially by the U.S. Department of Energy, Office of Basic Energy
   Sciences, Division of Materials Science and Engineering, under Contract
   No. DE-AC02-76SF00515 and by the Alexander von Humboldt Foundation.}},
Number-of-Cited-References = {{80}},
Times-Cited = {{18}},
Usage-Count-Last-180-days = {{4}},
Usage-Count-Since-2013 = {{78}},
Journal-ISO = {{Phys. Rev. B}},
Doc-Delivery-Number = {{254IY}},
Unique-ID = {{ISI:000327159700001}},
OA = {{Green Published}},
DA = {{2020-12-22}},
}