Spectroscopic Studies on the Metal–Insulator Transition Mechanism in Correlated Materials

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Title
Spectroscopic Studies on the Metal–Insulator Transition Mechanism in Correlated Materials
Author(s)
So Yeun Kim; Min‐Cheol Lee; Marie Kratochvilova; Seokhwan Yun; Soon Jae Moon; Changhee Sohn; Je-Geun Park; Changyoung Kim; Tae Won Noh
Publication Date
2018-08
Journal
ADVANCED MATERIALS, v.30, no.42, pp.1704777 -
Publisher
WILEY-V C H VERLAG GMBH
Abstract
The metal–insulator transition (MIT) in correlated materials is a novel phenomenon that accompanies a large change in resistivity, often many orders of magnitude. It is important in its own right but its switching behavior in resistivity can be useful for device applications. From the material physics point of view, the starting point of the research on the MIT should be to understand the microscopic mechanism. Here, an overview of recent efforts to unravel the microscopic mechanisms for various types of MITs in correlated materials is provided. Research has focused on transition metal oxides (TMOs), but transition metal chalcogenides have also been studied. Along the way, a new class of MIT materials is discovered, the so-called relativistic Mott insulators in 5d TMOs. Distortions in the MO6 (M = transition metal) octahedron are found to have a large and peculiar effect on the band structure in an orbital dependent way, possibly paving a way to the orbital selective Mott transition. In the final section, the character of the materials suitable for applications is summarized, followed by a brief discussion of some of the efforts to control MITs in correlated materials, including a dynamical approach using light. © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
URI
https://pr.ibs.re.kr/handle/8788114/5781
ISSN
0935-9648
Appears in Collections:
Center for Correlated Electron Systems(강상관계 물질 연구단) > Journal Papers (저널논문)
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