Large linear magnetoresistance in heavily-doped Nb:SrTiO 3 epitaxial thin films

Hyunwoo Jin, Keundong Lee, Seung Hyub Baek, Jin Sang Kim, Byung Ki Cheong, Bae Ho Park, Sungwon Yoon, B. J. Suh, Changyoung Kim, S. S.A. Seo, Suyoun Lee

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11 Scopus citations


Interaction between electrons has long been a focused topic in condensed-matter physics since it has led to the discoveries of astonishing phenomena, for example, high-T c superconductivity and colossal magnetoresistance (CMR) in strongly-correlated materials. In the study of strongly-correlated perovskite oxides, Nb-doped SrTiO 3 (Nb:SrTiO 3) has been a workhorse not only as a conducting substrate, but also as a host possessing high carrier mobility. In this work, we report the observations of large linear magnetoresistance (LMR) and the metal-to-insulator transition (MIT) induced by magnetic field in heavily-doped Nb:STO (SrNb 0.2 Ti 0.8 O 3) epitaxial thin films. These phenomena are associated with the interplay between the large classical MR due to high carrier mobility and the electronic localization effect due to strong spin-orbit coupling, implying that heavily Nb-doped Sr(Nb 0.2 Ti 0.8)O 3 is promising for the application in spintronic devices.

Original languageEnglish
Article number34295
JournalScientific Reports
StatePublished - Oct 5 2016

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© The Author(s) 2016.

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