Metallicity in LaTiO3 thin films induced by lattice deformation
- Metallicity in LaTiO3 thin films induced by lattice deformation
- Franklin J. Wong; Seung-Hyub Baek; Rajesh V. Chopdekar; Virat V. Mehta; 장호원; Chang-Beom Eom; Yuri Suzuki
- LaTiO3; Lattice deformation; Metallicity
- Issue Date
- Physical review B, Condensed matter and materials physics
- VOL 81, 161101-1-161101-4
- Orthorhombic bulk LaTiO3 is a correlated Mott insulator whose delicate antiferromagnetic insulating ground
state can be easily destroyed by cation vacancies, excess oxygen, or alkaline-earth dopants, resulting in
metallicity. Here we show that metallic conduction can also be realized in epitaxial LaTiO3 thin films on (001)
SrTiO3 substrates, while films grown on (110) DyScO3 and GdScO3 substrates are insulating. These results
illustrate the sensitivity of electrical transport to lattice effects and demonstrate the tunability of correlated
oxide thin-film properties via substrate-induced deformation.
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