Superlattice-induced minigaps in graphene band structure due to underlying one-dimensional nanostructuration

被引：15

作者：

Celis, A. ^{[1
]}

Nair, M. N. ^{[1
,2
]}

Sicot, M. ^{[3
]}

Nicolas, F. ^{[2
]}

Kubsky, S. ^{[2
]}

Malterre, D. ^{[3
]}

Taleb-Ibrahimi, A. ^{[2
]}

Tejeda, A. ^{[1
,2
]}

机构：

[1] Univ Paris Saclay, Univ Paris Sud, CNRS, Lab Phys Solides, F-91405 Orsay, France

[2] Synchrotron SOLEIL, F-91192 Gif Sur Yvette, France

[3] Univ Lorraine, UMR 7198, Inst Jean Lamour, CNRS, F-54506 Vandoeuvre Les Nancy, France

来源：

PHYSICAL REVIEW B | 2018年 / 97卷 / 19期

关键词：

DIRAC FERMIONS; STATES; GAP; SURFACES; POINTS; LAYER;

D O I：

10.1103/PhysRevB.97.195410

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have studied the influence of one-dimensional periodic nanostructured substrates on graphene band structure. One-monolayer-thick graphene is extremely sensitive to periodic terrace arrays, as demonstrated on two different nanostructured substrates, namely Ir(332) and multivicinal curved Pt(111). Photoemission shows the presence of minigaps related to the spatial periodicity. The potential barrier strength of the one-dimensional periodic nanostructuration can be tailored with the step-edge type and the nature of the substrate. The minigap opening further demonstrates the presence of backward scattered electronic waves on the surface and the absence of Klein tunneling on the substrate, probably due to the fast variation of the potential, of a spatial extent of the order of the lattice parameter of

引用

页数：6

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