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다차원 탄소재료 연구단
다차원 탄소재료 연구단
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Observation of spin-polarized Anderson state around charge neutral point in graphene with Fe-clusters

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Title
Observation of spin-polarized Anderson state around charge neutral point in graphene with Fe-clusters
Author(s)
Park J.; Oh I.; Jin M.-J.; Jo J.; Choe D.; Yun H.D.; Suk Woo Lee; Zonghoon Lee; Kwon S.-Y.; Jin H.; Chung S.B.; Yoo J.-W.
Publication Date
2020-12
Journal
SCIENTIFIC REPORTS, v.10, no.1, pp.4784 -
Publisher
NATURE PUBLISHING GROUP
Abstract
© 2020, The Author(s).The pristine graphene described with massless Dirac fermion could bear topological insulator state and ferromagnetism via the band structure engineering with various adatoms and proximity effects from heterostructures. In particular, topological Anderson insulator state was theoretically predicted in tight-binding honeycomb lattice with Anderson disorder term. Here, we introduced physi-absorbed Fe-clusters/adatoms on graphene to impose exchange interaction and random lattice disorder, and we observed Anderson insulator state accompanying with Kondo effect and field-induced conducting state upon applying the magnetic field at around a charge neutral point. Furthermore, the emergence of the double peak of resistivity at ν = 0 state indicates spin-splitted edge state with high effective exchange field (>70 T). These phenomena suggest the appearance of topological Anderson insulator state triggered by the induced exchange field and disorder
URI
https://pr.ibs.re.kr/handle/8788114/7116
ISSN
2045-2322
Appears in Collections:
Center for Multidimensional Carbon Materials(다차원 탄소재료 연구단) > Journal Papers (저널논문)
Files in This Item:
05 s41598-020-61481-6.pdfDownload

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