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Quasimolecular elec...
Quasimolecular electronic structure of the spin-liquid candidate Ba3 InIr2 O9
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- Revelli, A. (författare)
- Univ Cologne, Inst Phys 2, D-50937 Cologne, Germany.
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- Moretti Sala, M. (författare)
- European Synchrotron Radiat Facil, BP 220, F-38043 Grenoble, France.;Politecn Milan, Dipartimento Fis, I-20133 Milan, Italy.,Univ Cologne, Inst Phys 2, D-50937 Cologne, Germany.
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- Monaco, G. (författare)
- Univ Padua, Dipartimento Fis & Astron Galileo Galilei, I-35121 Padua, Italy.,Univ Cologne, Inst Phys 2, D-50937 Cologne, Germany.
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- Magnaterra, M. (författare)
- Univ Cologne, Inst Phys 2, D-50937 Cologne, Germany.
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- Attig, J. (författare)
- Univ Cologne, Inst Theoret Phys, D-50937 Cologne, Germany.
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- Peterlini, L. (författare)
- Univ Cologne, Inst Theoret Phys, D-50937 Cologne, Germany.
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- Dey, T. (författare)
- Univ Cologne, Inst Phys 2, D-50937 Cologne, Germany.;Indian Sch Mines, Dept Petr Engn, IIT, Dhanbad 826004, Jharkhand, India.;Univ Augsburg, Ctr Elect Correlat & Magnetism, Expt Phys 6, D-86159 Augsburg, Germany.
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- Tsirlin, A. A. (författare)
- Univ Augsburg, Ctr Elect Correlat & Magnetism, Expt Phys 6, D-86159 Augsburg, Germany.
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- Gegenwart, P. (författare)
- Univ Augsburg, Ctr Elect Correlat & Magnetism, Expt Phys 6, D-86159 Augsburg, Germany.
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- Fröhlich, T. (författare)
- Univ Cologne, Inst Phys 2, D-50937 Cologne, Germany.
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Braden, M. (författare)
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- Grams, C. (författare)
- Univ Cologne, Inst Phys 2, D-50937 Cologne, Germany.
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- Hemberger, J. (författare)
- Univ Cologne, Inst Phys 2, D-50937 Cologne, Germany.
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- Becker, P. (författare)
- Univ Cologne, Inst Geol & Mineral, Crystallog Sect, D-50674 Cologne, Germany.
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- Hermanns, Maria (författare)
- KTH,Nordic Institute for Theoretical Physics NORDITA
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- Khomskii, D. I. (författare)
- Univ Cologne, Inst Phys 2, D-50937 Cologne, Germany.
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- van den Brink, J. (författare)
- IFW Dresden, Inst Theoret Solid State Phys, D-01069 Dresden, Germany.;Tech Univ Dresden, Inst Theoret Phys, D-01069 Dresden, Germany.;Tech Univ Dresden, Wurzburg Dresden Cluster Excellence Ct Qmat, D-01069 Dresden, Germany.
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- Hermanns, Maria, 1980- (författare)
- Stockholms universitet,Fysikum,Nordiska institutet för teoretisk fysik (Nordita)
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Grüninger, M. (författare)
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Univ Cologne, Inst Phys 2, D-50937 Cologne, Germany European Synchrotron Radiat Facil, BP 220, F-38043 Grenoble, France.;Politecn Milan, Dipartimento Fis, I-20133 Milan, Italy. (creator_code:org_t)
- American Physical Society, 2022
- 2022
- Engelska.
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Ingår i: Physical Review B. - : American Physical Society. - 2469-9950 .- 2469-9969. ; 106:15
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- The mixed-valent iridate Ba3InIr2O9 has been discussed as a promising candidate for quantum spin-liquid behavior. The compound exhibits Ir4.5+ ions in face-sharing IrO6 octahedra forming Ir2O9 dimers with three t2g holes per dimer. Our results establish Ba3InIr2O9 as a cluster Mott insulator. Strong intradimer hopping delocalizes the three t2g holes in quasimolecular dimer states while interdimer charge fluctuations are suppressed by Coulomb repulsion. The magnetism of Ba3InIr2O9 emerges from spin-orbit entangled quasimolecular moments with yet unexplored interactions, opening up a new route to unconventional magnetic properties of 5d compounds. Using single-crystal x-ray diffraction we find the monoclinic space group C2/c already at room temperature. Dielectric spectroscopy shows insulating behavior. Resonant inelastic x-ray scattering reveals a rich excitation spectrum below 1.5 eV with a sinusoidal dynamical structure factor that unambiguously demonstrates the quasimolecular character of the electronic states. Below 0.3 eV, we observe a series of excitations. According to exact diagonalization calculations, such low-energy excitations reflect the proximity of Ba3InIr2O9 to a hopping-induced phase transition based on the condensation of a quasimolecular spin-orbit exciton. The dimer ground state roughly hosts two holes in a bonding j=1/2 orbital and the third hole in a bonding j=3/2 orbital.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Nyckelord
- Binary alloys
- Dimers
- Electronic structure
- Mott insulators
- Single crystals
- X ray scattering
- Charge fluctuations
- Electronic.structure
- Interdimers
- Liquid behavior
- Mixed-valent
- Orbitals
- Quantum spin liquid
- Spin liquids
- Spin orbits
- Ground state
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- art (ämneskategori)
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Revelli, A.
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Moretti Sala, M.
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Monaco, G.
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Magnaterra, M.
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Attig, J.
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Peterlini, L.
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visa fler...
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Dey, T.
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Tsirlin, A. A.
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Gegenwart, P.
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Fröhlich, T.
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Braden, M.
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Grams, C.
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Hemberger, J.
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Becker, P.
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Hermanns, Maria
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Khomskii, D. I.
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van den Brink, J ...
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Hermanns, Maria, ...
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Grüninger, M.
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visa färre...
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