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Experimental percolation studies of two-dimensional honeycomb lattice: Li2Mn1-xTixO3

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Title
Experimental percolation studies of two-dimensional honeycomb lattice: Li2Mn1-xTixO3
Author(s)
Sanghyun Lee; Junghwan Park; Jiyeon Kim; Kun-Pyo Hong; Youngmi Song; Je Geun Park
Subject
percolation, Li2MnO3, honeycomb lattice.
Publication Date
2014-07
Journal
JOURNAL OF PHYSICS-CONDENSED MATTER, v.26, no.30, pp.306002
Publisher
IOP PUBLISHING LTD
Abstract
Li2MnO3 with a S = 3/2 two-dimensional Mn honeycomb lattice has a Neel-type antiferromagnetic transition at T-N = 36 K with a broad maximum in magnetic susceptibility at T-M = 48 K. We have investigated site percolation effects by replacing Mn with nonmagnetic Ti, and completed a full phase diagram of Li2Mn1-xTixO3 solid solution systems to find that antiferromagnetic transition is continuously suppressed without a clear sign of changes in the Neel-type antiferromagnetic structure. The magnetic ordering eventually disappears at a critical concentration of x(c) = 0.7. This experimental observation is consistent with percolation theories for a honeycomb lattice when one considers up to 3rd nearest-neighbor interactions. This study highlights the importance of interaction beyond nearest neighbors even for the Mn element with relative localized 3d electrons in the honeycomb lattice.
URI
https://pr.ibs.re.kr/handle/8788114/981
DOI
10.1088/0953-8984/26/30/306002
ISSN
0953-8984
Appears in Collections:
Center for Correlated Electron Systems(강상관계 물질 연구단) > 1. Journal Papers (저널논문)
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