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Title: Jahn-Teller versus quantum effects in the spin-orbital material LuVO3

In this article, we report on combined neutron and resonant x-ray scattering results, identifying the nature of the spin-orbital ground state and magnetic excitations in LuVO3 as driven by the orbital parameter. In particular, we distinguish between models based on orbital-Peierls dimerization, taken as a signature of quantum effects in orbitals, and Jahn-Teller distortions, in favor of the latter. In order to solve this long-standing puzzle, polarized neutron beams were employed as a prerequisite in order to solve details of the magnetic structure, which allowed quantitative intensity analysis of extended magnetic-excitation data sets. The results of this detailed study enabled us to draw definite conclusions about the classical versus quantum behavior of orbitals in this system and to discard the previous claims about quantum effects dominating the orbital physics of LuVO3 and similar systems.
Authors:
 [1] ;  [2] ;  [2] ;  [3] ;  [4] ;  [2] ;  [5] ;  [6] ;  [4] ;  [3] ;  [3] ;  [7] ;  [5] ;  [5] ;  [3] ;  [8] ;  [9] ;  [10] ;  [10] ;  [11]
  1. Technische Univ. Munchen, Garching (Germany); Paul Scherrer Institute, Villigen (Switzerland)
  2. Paul Scherrer Institute, Villigen (Switzerland)
  3. Institut Laue-Langevin, Grenoble Cedex (France)
  4. Helmholtz-Zentrum Berlin fur Materialien und Energie, Berlin (Germany)
  5. Paul Scherrer Inst. (PSI), Villigen (Switzerland)
  6. Institut Laue-Langevin, Grenoble Cedex (France); Ecole Polytechnique Federale de Lausanne (EPFL), Lausanne (Switzerland)
  7. Univ. of Liverpool, Liverpool (United Kingdom)
  8. Univ. zu Koln, Koln (Germany)
  9. Paul Scherrer Institute, Villigen (Switzerland); Univ. of Geneva, Geneva (Switzerland)
  10. Iowa State Univ., Ames, IA (United States)
  11. Univ. of London - Egham, Surrey (United Kingdom)
Publication Date:
OSTI Identifier:
1227295
Report Number(s):
IS-J--8656
Journal ID: ISSN 1098-0121; PRBMDO
Grant/Contract Number:
290605; AC02-06CH11357; AC02-07CH11358
Type:
Accepted Manuscript
Journal Name:
Physical Review. B, Condensed Matter and Materials Physics
Additional Journal Information:
Journal Volume: 91; Journal Issue: 16; Journal ID: ISSN 1098-0121
Publisher:
American Physical Society (APS)
Research Org:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY