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Title: Enhanced spin-phonon-electronic coupling in a 5d oxide

Journal Article · · Nature Communications
DOI:https://doi.org/10.1038/ncomms9916· OSTI ID:1234319
 [1];  [2];  [3];  [2];  [1];  [4];  [5];  [1];  [1];  [1];  [1];  [1];  [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. National Inst. for Materials Science (NIMS), Tsukuba (Japan)
  3. Kyoto Univ. (Japan)
  4. Chinese Academy of Sciences (CAS), Beijing (China)
  5. Argonne National Lab. (ANL), Argonne, IL (United States)

Enhanced coupling of material properties offers new fundamental insights and routes to multifunctional devices. In this context 5d oxides provide new paradigms of cooperative interactions that drive novel emergent behaviour. This is exemplified in osmates that host metal–insulator transitions where magnetic order appears intimately entwined. Here we consider such a material, the 5d perovskite NaOsO3, and observe a coupling between spin and phonon manifested in a frequency shift of 40 cm-1, the largest measured in any material. The anomalous modes are shown to involve solely Os–O interactions and magnetism is revealed as the driving microscopic mechanism for the phonon renormalization. The magnitude of the coupling in NaOsO3 is primarily due to a property common to all 5d materials: the large spatial extent of the ion. This allows magnetism to couple to phonons on an unprecedented scale and in general offers multiple new routes to enhanced coupled phenomena in 5d materials.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS); Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); Japan Society for the Promotion of Science (JSPS); Ministry of Science and Technology of the People's Republic of China
Grant/Contract Number:
AC05-00OR22725; AC02-06CH11357; DMR-1420451; 22246083; 22850019; 25289233
OSTI ID:
1234319
Alternate ID(s):
OSTI ID: 1339098
Journal Information:
Nature Communications, Vol. 6; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 41 works
Citation information provided by
Web of Science

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Cited By (13)

[OsF 6 ] x : Molecular Models for Spin-Orbit Entangled Phenomena journal July 2017
Lattice dynamics of epitaxial strain-free interfaces text January 2018
Doping-induced insulator-metal transition in the Lifshitz magnetic insulator NaOsO 3 journal April 2019
Two-magnon scattering in the 5d all-in-all-out pyrochlore magnet Cd2Os2O7 journal August 2017
Isospin-phonon coupling and Fano-interference in spin-orbit Mott insulator Sr 2 IrO 4 journal April 2019
Spin and orbital excitations through the metal-to-insulator transition in Cd 2 Os 2 O 7 probed with high-resolution resonant inelastic x-ray scattering journal January 2020
Evidence of ferromagnetic ground state and strong spin phonon coupling in Zr 2 TiAl with bi-axial strain: first principles study journal May 2019
Lattice dynamics of epitaxial strain-free interfaces journal September 2018
Magnetodielectric coupling in a Ru-based 6H-perovskite, Ba 3 NdRu 2 O 9 journal July 2018
Spin-phonon coupling in antiferromagnetic nickel oxide journal December 2017
Unconventional spin-phonon coupling via the Dzyaloshinskii–Moriya interaction journal April 2019
Slater Insulator in Iridate Perovskites with Strong Spin-Orbit Coupling text January 2017
Correlated paramagnetism and interplay of magnetic and phononic degrees of freedom in 3 d -5 d coupled La 2 CuIrO 6 journal September 2019