Origin of magnetic moments and presence of spin-orbit singlets in Ba2YIrO6

@article{ ISI:000439786100005,
Author = {Nag, Abhishek and Bhowal, Sayantika and Chakraborty, Atasi and Sala, M.
   M. and Efimenko, A. and Bert, F. and Biswas, P. K. and Hillier, A. D.
   and Itoh, M. and Kaushik, S. D. and Siruguri, V. and Meneghini, C. and
   Dasgupta, I. and Ray, Sugata},
Title = {{Origin of magnetic moments and presence of spin-orbit singlets in
   Ba2YIrO6}},
Journal = {{PHYSICAL REVIEW B}},
Year = {{2018}},
Volume = {{98}},
Number = {{1}},
Month = {{JUL 26}},
Abstract = {{While itwas speculated that 5d(4) systemswould possess nonmagnetic J = 0
   ground state due to strong spin-orbit coupling (SOC), all such systems
   have invariably shown the presence of magnetic moments so far. A
   puzzling case is that of Ba2YIrO6, which in spite of having a perfectly
   cubic structure with largely separated Ir5+ (d4) ions, has consistently
   hosted weak magnetic moments. We show from muon spin relaxation (mu SR)
   measurements that a change in the magnetic environment of the implanted
   muons in Ba2YIrO6 occurs as the temperature is lowered
   below10Kindicatingmagnetic response has a temperature dependence
   unlikely for a J = 0 system. Interestingly, the estimated value of
   SOCobtained by fitting the resonant inelastic x-ray scattering (RIXS)
   spectrum ofBa(2)YIrO(6) with an effective atomic many-body Hamiltonian
   is found to be as high as 0.39 eV, comparable to the reported value of
   SOC in other magnetic d4 iridates with noncubic distortion. We argue
   that in addition to strong SOC, the presence of intersite hopping
   triggers delocalization of holes, resulting in the spontaneous
   generation of magnetic moments. Our theoretical calculations further
   indicate that these moments favor the formation of spin-orbital singlets
   in the case of Ba2YIrO6, which is manifested in mu SR experiments
   measured down to 60 mK.}},
Publisher = {{AMER PHYSICAL SOC}},
Address = {{ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA}},
Type = {{Article}},
Language = {{English}},
Affiliation = {{Ray, S (Corresponding Author), Indian Assoc Cultivat Sci, Dept Mat Sci, Kolkata 700032, India.
   Ray, S (Corresponding Author), Indian Assoc Cultivat Sci, Ctr Adv Mat, Kolkata 700032, India.
   Nag, Abhishek; Ray, Sugata, Indian Assoc Cultivat Sci, Dept Mat Sci, Kolkata 700032, India.
   Bhowal, Sayantika; Chakraborty, Atasi; Dasgupta, I., Indian Assoc Cultivat Sci, Dept Solid State Phys, Kolkata 700032, India.
   Sala, M. M.; Efimenko, A., ESRF European Synchrotron, 71 Ave Martyrs, F-38000 Grenoble, France.
   Bert, F., Univ Paris Saclay, Univ Paris Sud, CNRS, Lab Phys Solides, F-91405 Orsay, France.
   Biswas, P. K.; Hillier, A. D., Rutherford Appleton Lab, ISIS Facil, Didcot OX11 0QX, Oxon, England.
   Itoh, M., Tokyo Inst Technol, Mat & Struct Lab, 4259 Nagatsuta, Yokohama, Kanagawa 2268503, Japan.
   Kaushik, S. D.; Siruguri, V., Bhabha Atom Res Ctr, Mumbai Ctr, UGC DAE Consortium Sci Res, Bombay 400085, Maharashtra, India.
   Meneghini, C., Univ Roma Tre, Dipartimento Sci, Via Vasca Navale 84, I-00146 Rome, Italy.
   Dasgupta, I.; Ray, Sugata, Indian Assoc Cultivat Sci, Ctr Adv Mat, Kolkata 700032, India.}},
DOI = {{10.1103/PhysRevB.98.014431}},
Article-Number = {{014431}},
ISSN = {{2469-9950}},
EISSN = {{2469-9969}},
Keywords-Plus = {{LIQUIDS}},
Research-Areas = {{Materials Science; Physics}},
Web-of-Science-Categories  = {{Materials Science, Multidisciplinary; Physics, Applied; Physics,
   Condensed Matter}},
Author-Email = {{mssr@iacs.res.in}},
ResearcherID-Numbers = {{meneghini, carlo/F-7761-2013
   ITOH, Mitsuru/E-3481-2014
   Moretti, Marco/AAF-9255-2019
   Hillier, Adrian/AAN-7270-2020
   }},
ORCID-Numbers = {{meneghini, carlo/0000-0003-4846-8422
   ITOH, Mitsuru/0000-0001-6457-9152
   Moretti, Marco/0000-0002-9744-9976
   Nag, Abhishek/0000-0002-1394-5105
   Kaushik, SD/0000-0003-4265-9455}},
Funding-Acknowledgement = {{Indian Association for the Cultivation of Science, India; Council of
   Scientific and Industrial Research (CSIR), IndiaCouncil of Scientific &
   Industrial Research (CSIR) - India; Department of Science and Technology
   (DST)Department of Science & Technology (India) {[}WTI/2K15/74];
   Indo-Italian Program of Cooperation {[}20140355]; Saha Institute of
   Nuclear Physics {[}20140355]; Collaborative Research Projects of
   Materials and Structures Laboratory at Tokyo Institute of Technology
   (TiTech) {[}20140355]; Newton-India fund {[}20140355]; Jawaharlal Nehru
   Centre for Advanced Scientific Research from DST-Synchrotron-Neutron
   project {[}20140355]; SOCRATE of French National Research Agency
   {[}ANR-15-CE30-0009-01]; Department of Science and Technology (DST),
   Government of IndiaDepartment of Science & Technology (India)}},
Funding-Text = {{A.N. and S.B. thank Indian Association for the Cultivation of Science,
   and Council of Scientific and Industrial Research (CSIR), India,
   respectively, for support from a fellowship. S.R. thanks Department of
   Science and Technology (DST) {[}Project No. WTI/2K15/74] for funding,
   and also acknowledges financial support by Indo-Italian Program of
   Cooperation, Saha Institute of Nuclear Physics, Collaborative Research
   Projects of Materials and Structures Laboratory at Tokyo Institute of
   Technology (TiTech), Newton-India fund, and Jawaharlal Nehru Centre for
   Advanced Scientific Research from DST-Synchrotron-Neutron project, for
   performing experiments at Elettra (Proposal No. 20140355), Photon
   Factory, TiTech, ISIS, and ESRF, respectively. F.B. acknowledges
   financial support from project SOCRATE (ANR-15-CE30-0009-01) of French
   National Research Agency. I.D. thanks Department of Science and
   Technology (DST), Government of India for support.}},
Number-of-Cited-References = {{44}},
Times-Cited = {{10}},
Usage-Count-Last-180-days = {{1}},
Usage-Count-Since-2013 = {{27}},
Journal-ISO = {{Phys. Rev. B}},
Doc-Delivery-Number = {{GO2GA}},
Unique-ID = {{ISI:000439786100005}},
OA = {{Green Published}},
DA = {{2020-12-22}},
}