First-order melting of a weak spin-orbit mott insulator into a correlated metal

Hogan, Tom; Yamani, Z.; Walkup, D.; Chen, Xiang; Dally, Rebecca; Ward, Thomas Zac; Dean, M. P. M.; Hill, John P.; Islam, Z.; Madhavan, Vidya; Wilson, Stephen D.

doi:10.1103/PhysRevLett.114.257203

First-order melting of a weak spin-orbit mott insulator into a correlated metal

Journal Article · Thu Jun 25 00:00:00 EDT 2015 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.114.257203· OSTI ID:1286869

Hogan, Tom ^[1]; Yamani, Z. ^[2]; Walkup, D. ^[3]; Chen, Xiang ^[1]; Dally, Rebecca ^[1]; Ward, Thomas Zac ^[4]; Dean, M. P. M. ^[5]; Hill, John P. ^[5]; Islam, Z. ^[6]; Madhavan, Vidya ^[7]; Wilson, Stephen D. ^[8]

Boston College, Chestnut Hill, MA (United States); Univ. of California, Santa Barbara, CA (United States)
Canadian Neutron Beam Centre, National Research Council, Ontario (Canada)
Boston College, Chestnut Hill, MA (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Brookhaven National Lab. (BNL), Upton, NY (United States)
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Univ. of Illinois, Urbana-Champaign, IL (United States).
Univ. of California, Santa Barbara, CA (United States)

Herein, the electronic phase diagram of the weak spin-orbit Mott insulator (Sr_1-xLa_x)₃Ir₂O₇ is determined via an exhaustive experimental study. Upon doping electrons via La substitution, an immediate collapse in resistivity occurs along with a narrow regime of nanoscale phase separation comprised of antiferromagnetic, insulating regions and paramagnetic, metallic puddles persisting until x≈0.04. Continued electron doping results in an abrupt, first-order phase boundary where the Néel state is suppressed and a homogenous, correlated, metallic state appears with an enhanced spin susceptibility and local moments. In conclusion, as the metallic state is stabilized, a weak structural distortion develops and suggests a competing instability with the parent spin-orbit Mott state.

View Accepted Manuscript (DOE)

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

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

Grant/Contract Number:: AC02-98CH10886; AC05-00OR22725

OSTI ID:: 1286869

Alternate ID(s):: OSTI ID: 1229086
OSTI ID: 1241377
OSTI ID: 1198531

Journal Information:: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 25 Vol. 114; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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A charge density wave-like instability in a doped spin–orbit-assisted weak Mott insulator Chu, H.; Zhao, L.; de la Torre, A. Nature Materials, Vol. 16, Issue 2 https://doi.org/10.1038/nmat4836	journal	January 2017
Quasistatic antiferromagnetism in the quantum wells of SmTiO3/SrTiO3 heterostructures Need, Ryan F.; Marshall, Patrick B.; Kenney, Eric npj Quantum Materials, Vol. 3, Issue 1 https://doi.org/10.1038/s41535-018-0081-8	journal	February 2018
Lattice frustration in spin-orbit Mott insulator Sr3Ir2O7 at high pressure Zhang, Jianbo; Yan, Dayu; Yesudhas, Sorb npj Quantum Materials, Vol. 4, Issue 1 https://doi.org/10.1038/s41535-019-0162-3	journal	May 2019
Determination of the local structure of Sr _2−x M _x IrO ₄ (M = K, La) as a function of doping and temperature Terashima, Kensei; Paris, Eugenio; Salas-Colera, Eduardo Physical Chemistry Chemical Physics, Vol. 20, Issue 36 https://doi.org/10.1039/c8cp03756f	journal	January 2018
Critical fluctuations in the spin–orbit Mott insulator Sr ₃ Ir ₂ O ₇ Vale, J. G.; Boseggia, S.; Walker, H. C. Journal of Physics: Condensed Matter, Vol. 31, Issue 18 https://doi.org/10.1088/1361-648x/ab0471	journal	March 2019
Preferential quenching of 5 d antiferromagnetic order in Sr ₃ (Ir _{1− x} Mn _x ) ₂ O ₇ Schmehr, Julian L.; Zoghlin, Eli; Porter, Zach Journal of Physics: Condensed Matter, Vol. 31, Issue 24 https://doi.org/10.1088/1361-648x/ab0ef9	journal	April 2019
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Epitaxial growth and antiferromagnetism of Sn-substituted perovskite iridate SrI r 0.8 S n 0.2 O 3 Yang, Junyi; Hao, Lin; Cui, Qi Physical Review Materials, Vol. 3, Issue 12 https://doi.org/10.1103/physrevmaterials.3.124411	journal	December 2019
A charge density wave-like instability in a doped spin-orbit-assisted weak Mott insulator Chu, H.; Zhao, L.; de la Torre, A. arXiv https://doi.org/10.48550/arxiv.1701.05194	text	January 2017

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