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Title: Response of the Lattice across the Filling-Controlled Mott Metal-Insulator Transition of a Rare Earth Titanate

The lattice response of a prototype Mott insulator, SmTiO 3, to hole doping is investigated with atomic-scale spatial resolution. SmTiO 3 films are doped with Sr on the Sm site with concentrations that span the insulating and metallic sides of the filling-controlled Mott metal-insulator transition (MIT). The GdFeO 3-type distortions are investigated using an atomic resolution scanning transmission electron microscopy technique that can resolve small lattice distortions with picometer precision. We show that these distortions are gradually and uniformly reduced as the Sr concentration is increased without any phase separation. Significant distortions persist into the metallic state. In conclusion, the results present a new picture of the physics of this prototype filling-controlled MIT, which is discussed.
Authors:
 [1] ;  [1] ;  [1] ;  [1] ;  [2] ;  [1]
  1. Univ. of California, Santa Barbara, CA (United States)
  2. Univ. of California, Santa Barbara, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
Publication Date:
Grant/Contract Number:
AC02-76SF00515; FG02-02ER45994; W911NF-16-1-0361; DEFG02-02ER45994
Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 119; Journal Issue: 18; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Research Org:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
OSTI Identifier:
1410526
Alternate Identifier(s):
OSTI ID: 1406654; OSTI ID: 1418217

Kim, Honggyu, Marshall, Patrick B., Ahadi, Kaveh, Mates, Thomas E., Mikheev, Evgeny, and Stemmer, Susanne. Response of the Lattice across the Filling-Controlled Mott Metal-Insulator Transition of a Rare Earth Titanate. United States: N. p., Web. doi:10.1103/PhysRevLett.119.186803.
Kim, Honggyu, Marshall, Patrick B., Ahadi, Kaveh, Mates, Thomas E., Mikheev, Evgeny, & Stemmer, Susanne. Response of the Lattice across the Filling-Controlled Mott Metal-Insulator Transition of a Rare Earth Titanate. United States. doi:10.1103/PhysRevLett.119.186803.
Kim, Honggyu, Marshall, Patrick B., Ahadi, Kaveh, Mates, Thomas E., Mikheev, Evgeny, and Stemmer, Susanne. 2017. "Response of the Lattice across the Filling-Controlled Mott Metal-Insulator Transition of a Rare Earth Titanate". United States. doi:10.1103/PhysRevLett.119.186803. https://www.osti.gov/servlets/purl/1410526.
@article{osti_1410526,
title = {Response of the Lattice across the Filling-Controlled Mott Metal-Insulator Transition of a Rare Earth Titanate},
author = {Kim, Honggyu and Marshall, Patrick B. and Ahadi, Kaveh and Mates, Thomas E. and Mikheev, Evgeny and Stemmer, Susanne},
abstractNote = {The lattice response of a prototype Mott insulator, SmTiO3, to hole doping is investigated with atomic-scale spatial resolution. SmTiO3 films are doped with Sr on the Sm site with concentrations that span the insulating and metallic sides of the filling-controlled Mott metal-insulator transition (MIT). The GdFeO3-type distortions are investigated using an atomic resolution scanning transmission electron microscopy technique that can resolve small lattice distortions with picometer precision. We show that these distortions are gradually and uniformly reduced as the Sr concentration is increased without any phase separation. Significant distortions persist into the metallic state. In conclusion, the results present a new picture of the physics of this prototype filling-controlled MIT, which is discussed.},
doi = {10.1103/PhysRevLett.119.186803},
journal = {Physical Review Letters},
number = 18,
volume = 119,
place = {United States},
year = {2017},
month = {11}
}

Works referenced in this record:

Metal-insulator transitions
journal, October 1998
  • Imada, Masatoshi; Fujimori, Atsushi; Tokura, Yoshinori
  • Reviews of Modern Physics, Vol. 70, Issue 4, p. 1039-1263
  • DOI: 10.1103/RevModPhys.70.1039