Superlattice structures in twisted bilayers of folded graphene

被引：83

作者：

Schmidt, Hennrik ^{[1
,2
,3
]}

Rode, Johannes C. ^{[1
]}

Smirnov, Dmitri ^{[1
]}

Haug, Rolf J. ^{[1
]}

机构：

[1] Leibniz Univ Hannover, Inst Festkorperphys, D-30167 Hannover, Germany

[2] Natl Univ Singapore, Ctr Adv Mat 2D, Singapore 117546, Singapore

[3] Natl Univ Singapore, Graphene Res Ctr, Singapore 117546, Singapore

来源：

NATURE COMMUNICATIONS | 2014年 / 5卷

关键词：

DIRAC FERMIONS;

D O I：

10.1038/ncomms6742

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The electronic properties of bilayer graphene strongly depend on relative orientation of the two atomic lattices. Whereas Bernal-stacked graphene is most commonly studied, a rotational mismatch between layers opens up a whole new field of rich physics, especially at small interlayer twist. Here we report on magnetotransport measurements on twisted graphene bilayers, prepared by folding of single layers. These reveal a strong dependence on the twist angle, which can be estimated by means of sample geometry. At small rotation, superlattices with a wavelength in the order of 10 nm arise and are observed by friction atomic force microscopy. Magnetotransport measurements in this small-angle regime show the formation of satellite Landau fans. These are attributed to additional Dirac singularities in the band structure and discussed with respect to the wide range of interlayer coupling models.

引用

页数：7

共 39 条

[1] Moire butterflies in twisted bilayer graphene [J].

Bistritzer, R. ;

MacDonald, A. H. .

PHYSICAL REVIEW B, 2011, 84 (03)

[2] Moire bands in twisted double-layer graphene [J].

Bistritzer, Rafi ;

MacDonald, Allan H. .

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2011, 108 (30) :12233-12237

[3] Unraveling the Intrinsic and Robust Nature of van Hove Singularities in Twisted Bilayer Graphene by Scanning Tunneling Microscopy and Theoretical Analysis [J].

Brihuega, I. ;

Mallet, P. ;

Gonzalez-Herrero, H. ;

de laissardiere, G. Trambly ;

Ugeda, M. M. ;

Magaud, L. ;

Gomez-Rodriguez, J. M. ;

Yndurain, F. ;

Veuillen, J. -Y. .

PHYSICAL REVIEW LETTERS, 2012, 109 (19)

[4] The electronic properties of graphene [J].

Castro Neto, A. H. ;

Guinea, F. ;

Peres, N. M. R. ;

Novoselov, K. S. ;

Geim, A. K. .

REVIEWS OF MODERN PHYSICS, 2009, 81 (01) :109-162

[5] Angle dependence of the Landau level spectrum in twisted bilayer graphene [J].

Choi, Min-Young ;

Hyun, Young-Hwan ;

Kim, Yoonbai .

PHYSICAL REVIEW B, 2011, 84 (19)

[6] Coexistence of van Hove singularities and superlattice Dirac points in a slightly twisted graphene bilayer [J].

Chu, Zhao-Dong ;

He, Wen-Yu ;

He, Lin .

PHYSICAL REVIEW B, 2013, 87 (15)

[7] Topologically protected zero modes in twisted bilayer graphene [J].

de Gail, R. ;

Goerbig, M. O. ;

Guinea, F. ;

Montambaux, G. ;

Castro Neto, A. H. .

PHYSICAL REVIEW B, 2011, 84 (04)

[8] Hofstadter's butterfly and the fractal quantum Hall effect in moire superlattices [J].

Dean, C. R. ;

Wang, L. ;

Maher, P. ;

Forsythe, C. ;

Ghahari, F. ;

Gao, Y. ;

Katoch, J. ;

Ishigami, M. ;

Moon, P. ;

Koshino, M. ;

Taniguchi, T. ;

Watanabe, K. ;

Shepard, K. L. ;

Hone, J. ;

Kim, P. .

NATURE, 2013, 497 (7451) :598-602

[9] Graphene bilayer with a twist: Electronic structure [J].

dos Santos, J. M. B. Lopes ;

Peres, N. M. R. ;

Castro Neto, A. H. .

PHYSICAL REVIEW LETTERS, 2007, 99 (25)

[10] Quantum Hall effect in Bernal stacked and twisted bilayer graphene grown on Cu by chemical vapor deposition [J].

Fallahazad, Babak ;

Hao, Yufeng ;

Lee, Kayoung ;

Kim, Seyoung ;

Ruoff, R. S. ;

Tutuc, E. .

PHYSICAL REVIEW B, 2012, 85 (20)

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