| Autor: |
Nag, A, Middey, S, Bhowal, S, Panda, SK, Mathieu, R, Orain, JC, Bert, F, Mendels, P, Freeman, Paul Gregory, Mansson, M, Ronnow, HM, Telling, M, Biswas, PK, Sheptyakov, D, Kaushik, SD, Siruguri, V, Meneghini, C, Sarma, DD, Dasgupta, I, Ray, S, Department of Materials Science, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India, Centre for Advanced Materials, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India, Department of Solid State Physics, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India, Department of Engineering Sciences, Uppsala University, P.O. Box 534, SE-751 21 Uppsala, Sweden, Laboratoire de Physique des Solides, UMR CNRS 8502, Université Paris-Sud, 91405 Orsay, France, Laboratory for Quantum Magnetism (LQM), École Polytechnique Fédérale de Lausanne (EPFL), Station 3, CH-1015 Lausanne, Switzerland, Jeremiah Horrocks Institute for Mathematics, Physics and Astrophysics, University of Central Lancashire, Preston PR1 2HE, United Kingdom, Department of Materials and Nanophysics, KTH Royal Institute of Technology, Electrum 229, SE-16440 Kista, Sweden, ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon OX110QX, United Kingdom, Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland, Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland, UGC-DAE-Consortium for Scientific Research Mumbai Centre, R5 Shed, Bhabha Atomic Research Centre, Mumbai 400085, India, Dipartimento di Scienze, Universitá Roma Tre, Via della Vasca Navale, 84 I-00146 Roma, Italy, Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore 560012, India |
| Jazyk: |
angličtina |
| Rok vydání: |
2016 |
| Předmět: |
|
| ISSN: |
0031-9007 |
| Popis: |
We show using detailed magnetic and thermodynamic studies and theoretical calculations that the ground state of Ba3ZnIr2O9 is a realization of a novel spin-orbital liquid state. Our results reveal that Ba3ZnIr2O9 with Ir5+ (5d(4)) ions and strong spin-orbit coupling (SOC) arrives very close to the elusive J = 0 state but each Ir ion still possesses a weak moment. Ab initio density functional calculations indicate that this moment is developed due to superexchange, mediated by a strong intradimer hopping mechanism. While the Ir spins within the structural Ir2O9 dimer are expected to form a spin-orbit singlet state (SOS) with no resultant moment, substantial frustration arising from interdimer exchange interactions induce quantum fluctuations in these possible SOS states favoring a spin-orbital liquid phase down to at least 100 mK. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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