Evidence for a low-temperature magnetic ground state in double-perovskite iridates with Ir5+(5d4) ions

Terzic, Jasminka; Zheng, Hao; Ye, Feng; Zhao, H. D.; Schlottmann, P.; De Long, L. E.; Yuan, S. J.; Cao, Gang

doi:10.1103/PhysRevB.96.064436

Title: Evidence for a low-temperature magnetic ground state in double-perovskite iridates with $I r^{5 +} (5 d^{4})$ ions

Journal Article · Tue Aug 29 00:00:00 EDT 2017 · Physical Review B

DOI:https://doi.org/10.1103/PhysRevB.96.064436· OSTI ID:1471893

Terzic, Jasminka ^[1]; Zheng, Hao ^[1];

^[2]; Zhao, H. D. ^[1]; Schlottmann, P. ^[3]; De Long, L. E. ^[4]; Yuan, S. J. ^[4]; Cao, Gang ^[1]

Univ. of Colorado, Boulder, CO (United States). Dept. of Physics
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Quantum Condensed Matter Division; Univ. of Kentucky, Lexington, KY (United States). Dept. of Physics and Astronomy and Center for Advanced Materials
Florida State Univ., Tallahassee, FL (United States). Dept. of Physics
Univ. of Kentucky, Lexington, KY (United States). Dept. of Physics and Astronomy and Center for Advanced Materials

Here, we report an unusual magnetic ground state in single-crystal, double-perovskite Ba₂YIrO₆ and Sr-doped Ba₂YIrO₆ with Ir⁵⁺ (5d⁴) ions. Long-range magnetic order below 1.7 K is confirmed by dc magnetization, ac magnetic susceptibility, and heat-capacity measurements. The observed magnetic order is extraordinarily delicate and cannot be explained in terms of either a low-spin S=1 state, or a singlet J_eff=0 state imposed by the spin-orbit interactions (SOI). Alternatively, the magnetic ground state appears consistent with a SOI that competes with comparable Hund's rule coupling and inherently large electron hopping, which cannot stabilize the singlet J_eff=0 ground state. However, this picture is controversial, and conflicting magnetic behavior for these materials is reported in both experimental and theoretical studies, which highlights the intricate interplay of interactions that determine the ground state of materials with strong SOI.

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Research Organization:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)

Grant/Contract Number:: AC05-00OR22725; FG02-98ER45707; DMR-1265162; DMR-1712101; DMR- 1506979

OSTI ID:: 1471893

Alternate ID(s):: OSTI ID: 1377642

Journal Information:: Physical Review B, Vol. 96, Issue 6; ISSN 2469-9950

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 40 works

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Comparative Study of Potentially J _eff = 0 Ground State Iridium(V) in SrLaNiIrO ₆ , SrLaMgIrO ₆ , and SrLaZnIrO ₆: Comparative Study of Potentially J _eff = 0 Ground State Iridium(V) in SrLaNiIrO ₆ , SrLaMgIrO ₆ , and SrLaZnIrO ₆ Wolff, Klaus K.; Agrestini, Stefano; Tanaka, Arata Zeitschrift für anorganische und allgemeine Chemie, Vol. 643, Issue 23 https://doi.org/10.1002/zaac.201700386	journal	November 2017
Orbiton–phonon coupling in Ir ⁵⁺ (5 d ⁴ ) double perovskite Ba ₂ YIrO ₆ Singh, Birender; Cansever, G. A.; Dey, T. Journal of Physics: Condensed Matter, Vol. 31, Issue 6 https://doi.org/10.1088/1361-648x/aaf40a	journal	December 2018
The challenge of spin–orbit-tuned ground states in iridates: a key issues review Cao, Gang; Schlottmann, Pedro Reports on Progress in Physics, Vol. 81, Issue 4 https://doi.org/10.1088/1361-6633/aaa979	journal	February 2018
Nature of the magnetism of iridium in the double perovskite ${Sr}_{2} {CoIrO}_{6}$ Agrestini, S.; Chen, K.; Kuo, C. -Y. Physical Review B, Vol. 100, Issue 1 https://doi.org/10.1103/physrevb.100.014443	journal	July 2019
Ground state in the novel dimer iridate $B a_{13} I r_{6} O_{30}$ with $I r^{6 +} (5 d^{3})$ ions Zhao, Hengdi; Ye, Feng; Zheng, Hao Physical Review B, Vol. 100, Issue 6 https://doi.org/10.1103/physrevb.100.064418	journal	August 2019
Probing the $J_{eff} = 0$ ground state and the Van Vleck paramagnetism of the ${Ir}^{5 +}$ ions in layered ${Sr}_{2} {Co}_{0.5} {Ir}_{0.5} O_{4}$ Agrestini, S.; Kuo, C. -Y.; Chen, K. Physical Review B, Vol. 97, Issue 21 https://doi.org/10.1103/physrevb.97.214436	journal	June 2018
Block excitonic condensate at $n = 3.5$ in a spin-orbit coupled $t_{2 g}$ multiorbital Hubbard model Kaushal, Nitin; Nocera, Alberto; Alvarez, Gonzalo Physical Review B, Vol. 99, Issue 15 https://doi.org/10.1103/physrevb.99.155115	journal	April 2019
Orbiton-Phonon coupling in Ir5+(5d4) double perovskite Ba2YIrO6 Singh, Birender; Cansever, G. A.; Dey, T. arXiv https://doi.org/10.48550/arxiv.1702.00724	text	January 2017
Density matrix renormalization group study of a three-orbital Hubbard model with spin-orbit coupling in one dimension Kaushal, Nitin; Herbrych, Jacek; Nocera, Alberto arXiv https://doi.org/10.48550/arxiv.1707.04313	text	January 2017
Spin-orbit coupled systems in the "atomic" limit: rhenates, osmates, iridates Paramekanti, Arun; Singh, David J.; Yuan, Bo arXiv https://doi.org/10.48550/arxiv.1804.02006	text	January 2018

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