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

doi:10.1038/srep34295

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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Abstract

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 language	English
Article number	34295
Journal	Scientific Reports
Volume	6
DOIs	https://doi.org/10.1038/srep34295
State	Published - Oct 5 2016

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© The Author(s) 2016.

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title = "Large linear magnetoresistance in heavily-doped Nb:SrTiO 3 epitaxial thin films",

abstract = "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.",

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

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AU - Jin, Hyunwoo

AU - Lee, Keundong

AU - Baek, Seung Hyub

AU - Kim, Jin Sang

AU - Cheong, Byung Ki

AU - Park, Bae Ho

AU - Yoon, Sungwon

AU - Suh, B. J.

AU - Kim, Changyoung

AU - Seo, S. S.A.

AU - Lee, Suyoun

PY - 2016/10/5

Y1 - 2016/10/5

N2 - 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.

AB - 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.

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

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