by Vale, J. G., Calder, S., Donnerer, C., Pincini, D., Shi, Y. G., Tsujimoto, Y., Yamaura, K., Sala, M. Moretti, van den Brink, J., Christianson, A. D. and McMorrow, D. F.
Abstract:
NaOsO3 undergoes a metal-insulator transition (MIT) at 410 K, concomitant with the onset of antiferromagnetic order. The excitation spectra have been investigated through the MIT by resonant inelastic x-ray scattering (RIXS) at the Os L-3 edge. Low resolution (Delta E similar to 300 meV) measurements over a wide range of energies reveal that local electronic excitations do not change appreciably through the MIT. This is consistent with a picture in which structural distortions do not drive the MIT. In contrast, high resolution (Delta E similar to 56 meV) measurements show that the well-defined, low-energy magnons in the insulating state weaken and dampen upon approaching the metallic state. Concomitantly, a broad continuum of excitations develops which is well described by the magnetic fluctuations of a nearly antiferromagnetic Fermi liquid. By revealing the continuous evolution of the magnetic quasiparticle spectrum as it changes its character from itinerant to localized, our results provide unprecedented insight into the nature of the MIT in NaOsO3. In particular, the presence of weak correlations in the paramagnetic phase implies a degree of departure from the ideal Slater limit.
Reference:
Crossover from itinerant to localized magnetic excitations through the metal-insulator transition in NaOsO3 (Vale, J. G., Calder, S., Donnerer, C., Pincini, D., Shi, Y. G., Tsujimoto, Y., Yamaura, K., Sala, M. Moretti, van den Brink, J., Christianson, A. D. and McMorrow, D. F.), In PHYSICAL REVIEW B, AMER PHYSICAL SOC, volume 97, 2018.
Bibtex Entry:
@article{ ISI:000433420100002, Author = {Vale, J. G. and Calder, S. and Donnerer, C. and Pincini, D. and Shi, Y. G. and Tsujimoto, Y. and Yamaura, K. and Sala, M. Moretti and van den Brink, J. and Christianson, A. D. and McMorrow, D. F.}, Title = {{Crossover from itinerant to localized magnetic excitations through the metal-insulator transition in NaOsO3}}, Journal = {{PHYSICAL REVIEW B}}, Year = {{2018}}, Volume = {{97}}, Number = {{18}}, Month = {{MAY 30}}, Abstract = {{NaOsO3 undergoes a metal-insulator transition (MIT) at 410 K, concomitant with the onset of antiferromagnetic order. The excitation spectra have been investigated through the MIT by resonant inelastic x-ray scattering (RIXS) at the Os L-3 edge. Low resolution (Delta E similar to 300 meV) measurements over a wide range of energies reveal that local electronic excitations do not change appreciably through the MIT. This is consistent with a picture in which structural distortions do not drive the MIT. In contrast, high resolution (Delta E similar to 56 meV) measurements show that the well-defined, low-energy magnons in the insulating state weaken and dampen upon approaching the metallic state. Concomitantly, a broad continuum of excitations develops which is well described by the magnetic fluctuations of a nearly antiferromagnetic Fermi liquid. By revealing the continuous evolution of the magnetic quasiparticle spectrum as it changes its character from itinerant to localized, our results provide unprecedented insight into the nature of the MIT in NaOsO3. In particular, the presence of weak correlations in the paramagnetic phase implies a degree of departure from the ideal Slater limit.}}, Publisher = {{AMER PHYSICAL SOC}}, Address = {{ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA}}, Type = {{Article}}, Language = {{English}}, Affiliation = {{Vale, JG (Corresponding Author), UCL, London Ctr Nanotechnol, Gower St, London WC1E 6BT, England. Vale, JG (Corresponding Author), UCL, Dept Phys & Astron, Gower St, London WC1E 6BT, England. Vale, JG (Corresponding Author), Ecole Polytech Fed Lausanne, Lab Quantum Magnetism, CH-1015 Lausanne, Switzerland. Vale, J. G.; Donnerer, C.; Pincini, D.; McMorrow, D. F., UCL, London Ctr Nanotechnol, Gower St, London WC1E 6BT, England. Vale, J. G.; Donnerer, C.; Pincini, D.; McMorrow, D. F., UCL, Dept Phys & Astron, Gower St, London WC1E 6BT, England. Vale, J. G., Ecole Polytech Fed Lausanne, Lab Quantum Magnetism, CH-1015 Lausanne, Switzerland. Calder, S.; Christianson, A. D., Oak Ridge Natl Lab, Neutron Scattering Div, Oak Ridge, TN 37831 USA. Pincini, D., Diamond Light Source, Harwell Sci & Innovat Campus, Didcot OX11 0DE, Oxon, England. Shi, Y. G., Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China. Shi, Y. G., Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China. Shi, Y. G.; Tsujimoto, Y.; Yamaura, K., Natl Inst Mat Sci, Res Ctr Funct Mat, 1-1 Namiki, Tsukuba, Ibaraki 3050044, Japan. Yamaura, K., Hokkaido Univ, Grad Sch Chem Sci & Engn, Kita Ku, North 10 West 8, Sapporo, Hokkaido 0600810, Japan. Sala, M. Moretti, ESRF, European Synchrotron, 71 Ave Martyrs, F-38043 Grenoble, France. van den Brink, J., IFW Dresden, Inst Theoret Solid State Phys, D-01171 Dresden, Germany. Christianson, A. D., Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.}}, DOI = {{10.1103/PhysRevB.97.184429}}, Article-Number = {{184429}}, ISSN = {{2469-9950}}, EISSN = {{2469-9969}}, Keywords-Plus = {{SPIN DYNAMICS; ANTIFERROMAGNET; SPECTRUM}}, Research-Areas = {{Materials Science; Physics}}, Web-of-Science-Categories = {{Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter}}, Author-Email = {{j.vale@ucl.ac.uk caldersa@ornl.gov}}, ResearcherID-Numbers = {{Moretti, Marco/AAF-9255-2019 McMorrow, Desmond/C-2655-2008 van den Brink, Jeroen/Y-3931-2019 van den Brink, Jeroen/E-5670-2011 Tsujimoto, Yoshihiro/H-6034-2012 McMorrow, Desmond Francis/M-9036-2019 Shi, Youguo/B-6316-2018 }}, ORCID-Numbers = {{Moretti, Marco/0000-0002-9744-9976 McMorrow, Desmond/0000-0002-4947-7788 van den Brink, Jeroen/0000-0001-6594-9610 Tsujimoto, Yoshihiro/0000-0003-2140-3362 McMorrow, Desmond Francis/0000-0002-4947-7788 Calder, Stuart/0000-0001-8402-3741 YAMAURA, Kazunari/0000-0003-0390-8244 Pincini, Davide/0000-0002-0884-4748}}, Funding-Acknowledgement = {{University College London (UCL); Ecole Polytechnique Federale de Lausanne (EPFL); EPSRCEngineering & Physical Sciences Research Council (EPSRC) {[}EP/N027671/1, EP/N034872/1]; JSPS KAKENHIMinistry of Education, Culture, Sports, Science and Technology, Japan (MEXT)Japan Society for the Promotion of ScienceGrants-in-Aid for Scientific Research (KAKENHI) {[}15K14133, 16H04501]; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) {[}11774399, 11474330]}}, Funding-Text = {{J.G.V. thanks University College London (UCL) and Ecole Polytechnique Federale de Lausanne (EPFL) for financial support through a UCL Impact award, and useful discussions with B. J. Blackburn, A. Princep, and E. Vaisanen. Work at UCL was supported by the EPSRC (Grants No. EP/N027671/1 and No. EP/N034872/1). This research used resources at the High Flux Isotope Reactor and Spallation Neutron Source, DOE Office of Science User Facilities operated by the Oak Ridge National Laboratory. K.Y. thanks financial support from JSPS KAKENHI (Grants No. 15K14133 and No. 16H04501). Y.G.S. was supported by the National Natural Science Foundation of China (Grants No. 11774399 and No. 11474330). All data created during this research are openly available from the UCL Discovery data archive.}}, Number-of-Cited-References = {{71}}, Times-Cited = {{8}}, Usage-Count-Last-180-days = {{1}}, Usage-Count-Since-2013 = {{26}}, Journal-ISO = {{Phys. Rev. B}}, Doc-Delivery-Number = {{GH4YF}}, Unique-ID = {{ISI:000433420100002}}, OA = {{Green Published, Green Accepted, Bronze}}, DA = {{2020-12-22}}, }
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