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.
Kim, Honggyu, et al. "Response of the Lattice across the Filling-Controlled Mott Metal-Insulator Transition of a Rare Earth Titanate." Physical Review Letters, vol. 119, no. 18, Nov. 2017. https://doi.org/10.1103/PhysRevLett.119.186803
Kim, Honggyu, Marshall, Patrick B., Ahadi, Kaveh, Mates, Thomas E., Mikheev, Evgeny, & Stemmer, Susanne (2017). Response of the Lattice across the Filling-Controlled Mott Metal-Insulator Transition of a Rare Earth Titanate. Physical Review Letters, 119(18). https://doi.org/10.1103/PhysRevLett.119.186803
Kim, Honggyu, Marshall, Patrick B., Ahadi, Kaveh, et al., "Response of the Lattice across the Filling-Controlled Mott Metal-Insulator Transition of a Rare Earth Titanate," Physical Review Letters 119, no. 18 (2017), https://doi.org/10.1103/PhysRevLett.119.186803
@article{osti_1410526,
author = {Kim, Honggyu and Marshall, Patrick B. and Ahadi, Kaveh and Mates, Thomas E. and Mikheev, Evgeny and Stemmer, Susanne},
title = {Response of the Lattice across the Filling-Controlled Mott Metal-Insulator Transition of a Rare Earth Titanate},
annote = {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},
url = {https://www.osti.gov/biblio/1410526},
journal = {Physical Review Letters},
issn = {ISSN PRLTAO},
number = {18},
volume = {119},
place = {United States},
publisher = {American Physical Society (APS)},
year = {2017},
month = {11}}
Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, Vol. 276, Issue 1365, p. 238-257https://doi.org/10.1098/rspa.1963.0204
Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, Vol. 281, Issue 1386, p. 401-419https://doi.org/10.1098/rspa.1964.0190