Metallicity in LaTiO3 thin films induced by lattice deformation

Title
Metallicity in LaTiO3 thin films induced by lattice deformation
Authors
Franklin J. WongSeung-Hyub BaekRajesh V. ChopdekarVirat V. Mehta장호원Chang-Beom EomYuri Suzuki
Keywords
LaTiO3; Lattice deformation; Metallicity
Issue Date
2010-04
Publisher
Physical review B, Condensed matter and materials physics
Citation
VOL 81, 161101-1-161101-4
Abstract
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.
URI
http://pubs.kist.re.kr/handle/201004/45565
ISSN
1098-0121
Appears in Collections:
KIST Publication > Article
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