Phase Instability amid Dimensional Crossover in Artificial Oxide Crystal

Title
Phase Instability amid Dimensional Crossover in Artificial Oxide Crystal
Authors
이수연조성원Seung Gyo JeongTaewon MinSungmin WooJiwoong KimYu-Qiao ZhangJaeseok SonYoung-Min KimJung Hoon HanSungkyun ParkHu Young JeongHiromichi OhtaTae Won NohJaekwang LeeWoo Seok Choi
Issue Date
2020-01
Publisher
Physical review letters
Citation
VOL 124, 026401
Abstract
Artificial crystals synthesized by atomic-scale epitaxy provide the ability to control the dimensions of the quantum phases and associated phase transitions via precise thickness modulation. In particular, the reduction in dimensionality via quantized control of atomic layers is a powerful approach to revealing hidden electronic and magnetic phases. Here, we demonstrate a dimensionality-controlled and induced metal-insulator transition (MIT) in atomically designed superlattices by synthesizing a genuine twodimensional (2D) SrRuO3 crystal with highly suppressed charge transfer. The tendency to ferromagnetically align the spins in an SrRuO3 layer diminishes in 2D as the interlayer exchange interaction vanishes, accompanying the 2D localization of electrons. Furthermore, electronic and magnetic instabilities in the two SrRuO3 unit cell layers induce a thermally driven MIT along with a metamagnetic transition.
URI
http://pubs.kist.re.kr/handle/201004/70889
ISSN
0031-9007
Appears in Collections:
KIST Publication > Article
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