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Hogan T, Yamani Z, Walkup D, et al. First-Order Melting of a Weak Spin-Orbit Mott Insulator into a Correlated Metal. Phys Rev Lett. 2015;114(25):257203doi: 10.1103/PhysRevLett.114.257203.
Hogan, T., Yamani, Z., Walkup, D., Chen, X., Dally, R., Ward, T. Z., Dean, M. P., Hill, J., Islam, Z., Madhavan, V., & Wilson, S. D. (2015). First-Order Melting of a Weak Spin-Orbit Mott Insulator into a Correlated Metal. Physical review letters, 114(25), 257203. https://doi.org/10.1103/PhysRevLett.114.257203
Hogan, Tom, et al. "First-Order Melting of a Weak Spin-Orbit Mott Insulator into a Correlated Metal." Physical review letters vol. 114,25 (2015): 257203. doi: https://doi.org/10.1103/PhysRevLett.114.257203
Hogan T, Yamani Z, Walkup D, Chen X, Dally R, Ward TZ, Dean MP, Hill J, Islam Z, Madhavan V, Wilson SD. First-Order Melting of a Weak Spin-Orbit Mott Insulator into a Correlated Metal. Phys Rev Lett. 2015 Jun 26;114(25):257203. doi: 10.1103/PhysRevLett.114.257203. Epub 2015 Jun 25. PMID: 26197142.
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Phys Rev Lett. 2015 Jun 26;114(25):257203. doi: 10.1103/PhysRevLett.114.257203. Epub 2015 Jun 25.

First-Order Melting of a Weak Spin-Orbit Mott Insulator into a Correlated Metal.

Physical review letters

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

Affiliations

  1. Department of Physics, Boston College, Chestnut Hill, Massachusetts 02467, USA.
  2. Materials Department, University of California, Santa Barbara, California 93106, USA.
  3. Canadian Neutron Beam Centre, National Research Council, Chalk River, Ontario, Canada K0J 1P0.
  4. Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
  5. Department of Condensed Matter Physics and Materials Science, Brookhaven National Laboratory, Upton, New York 11973, USA.
  6. The Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA.
  7. Department of Physics and Frederick Seitz Materials Research Laboratory, University of Illinois Urbana-Champaign, Urbana, Illinois 61801, USA.

PMID: 26197142 DOI: 10.1103/PhysRevLett.114.257203

Abstract

The electronic phase diagram of the weak spin-orbit Mott insulator (Sr(1-x)La(x))(3)Ir(2)O(7) 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. As the metallic state is stabilized, a weak structural distortion develops and suggests a competing instability with the parent spin-orbit Mott state.

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