Spin–orbit coupled molecular quantum magnetism realized in inorganic solid

Sang-Youn Park, S.-H. Do, K.-Y. Choi, J.-H. Kang, Dongjin Jang, B. Schmidt, Manuel Brando, B.-H. Kim, D.-H. Kim, N. P. Butch, Seongsu Lee, J.-H. Park () and Sungdae Ji ()
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Sang-Youn Park: Max Planck POSTECH Center for Complex Phase Materials, Pohang University of Science and Technology
S.-H. Do: Max Planck POSTECH Center for Complex Phase Materials, Pohang University of Science and Technology
K.-Y. Choi: Chung-Ang University
J.-H. Kang: Max Planck Institute for Chemical Physics in Solid
Dongjin Jang: Max Planck Institute for Chemical Physics in Solid
B. Schmidt: Max Planck Institute for Chemical Physics in Solid
Manuel Brando: Max Planck Institute for Chemical Physics in Solid
B.-H. Kim: iTHES Research Group and Computational Condensed Matter Physics Laboratory, RIKEN
D.-H. Kim: Max Planck POSTECH Center for Complex Phase Materials, Pohang University of Science and Technology
N. P. Butch: NIST Center for Neutron Research, National Institute of Standards and Technology
Seongsu Lee: HANARO, Korea Atomic Energy Research Institute
J.-H. Park: Max Planck POSTECH Center for Complex Phase Materials, Pohang University of Science and Technology
Sungdae Ji: Max Planck POSTECH Center for Complex Phase Materials, Pohang University of Science and Technology

Nature Communications, 2016, vol. 7, issue 1, 1-7

Abstract: Abstract Molecular quantum magnetism involving an isolated spin state is of particular interest due to the characteristic quantum phenomena underlying spin qubits or molecular spintronics for quantum information devices, as demonstrated in magnetic metal–organic molecular systems, the so-called molecular magnets. Here we report the molecular quantum magnetism realized in an inorganic solid Ba3Yb2Zn5O11 with spin–orbit coupled pseudospin-½ Yb3+ ions. The magnetization represents the magnetic quantum values of an isolated Yb4 tetrahedron with a total (pseudo)spin 0, 1 and 2. Inelastic neutron scattering results reveal that a large Dzyaloshinsky–Moriya interaction originating from strong spin–orbit coupling of Yb 4f is a key ingredient to explain magnetic excitations of the molecular magnet states. The Dzyaloshinsky–Moriya interaction allows a non-adiabatic quantum transition between avoided crossing energy levels, and also results in unexpected magnetic behaviours in conventional molecular magnets.

Date: 2016
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DOI: 10.1038/ncomms12912

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