Exploring the graphene edges with coherent electron focusing

被引：35

作者：

Rakyta, P. ^{[1
]}

Kormanyos, A. ^{[2
]}

Cserti, J. ^{[1
]}

Koskinen, P. ^{[3
]}

机构：

[1] Eotvos Lorand Univ, Dept Phys Complex Syst, H-1117 Budapest, Hungary

[2] Univ Lancaster, Dept Phys, Lancaster LA1 4YB, England

[3] Univ Jyvaskyla, Dept Phys, NanoSci Ctr, Jyvaskyla 40014, Finland

来源：

PHYSICAL REVIEW B | 2010年 / 81卷 / 11期

基金：

英国工程与自然科学研究理事会; 芬兰科学院;

关键词：

NANORIBBONS;

D O I：

10.1103/PhysRevB.81.115411

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We study theoretically the coherent electron focusing in graphene nanoribbons. Using semiclassical and numerical tight-binding calculations we show that armchair edges give rise to equidistant peaks in the focusing spectrum. In the case of zigzag edges at low magnetic fields one can also observe focusing peaks but with increasing magnetic field a more complex interference structure emerges in the spectrum. This difference in the spectra can be observed even if the zigzag edge undergoes structural reconstruction. Therefore transverse electron focusing can help in the identification and characterization of the edge structure of graphene samples.

引用

页数：6

共 23 条

[1] Boundary conditions for Dirac fermions on a terminated honeycomb lattice [J].

Akhmerov, A. R. ;

Beenakker, C. W. J. .

PHYSICAL REVIEW B, 2008, 77 (08)

[2] Berry phase in graphene: Semiclassical perspective [J].

Carmier, Pierre ;

Ullmo, Denis .

PHYSICAL REVIEW B, 2008, 77 (24)

[3] Atomistic simulations of complex materials:: ground-state and excited-state properties [J].

Frauenheim, T ;

Seifert, G ;

Elstner, M ;

Niehaus, T ;

Köhler, C ;

Amkreutz, M ;

Sternberg, M ;

Hajnal, Z ;

Di Carlo, A ;

Suhai, S .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2002, 14 (11) :3015-3047

[4] Graphene at the Edge: Stability and Dynamics [J].

Girit, Caglar Oe ;

Meyer, Jannik C. ;

Erni, Rolf ;

Rossell, Marta D. ;

Kisielowski, C. ;

Yang, Li ;

Park, Cheol-Hwan ;

Crommie, M. F. ;

Cohen, Marvin L. ;

Louie, Steven G. ;

Zettl, A. .

SCIENCE, 2009, 323 (5922) :1705-1708

[5] Edge states on graphene ribbons in magnetic field: Interplay between Dirac and ferromagnetic-like gaps [J].

Gusynin, V. P. ;

Miransky, V. A. ;

Sharapov, S. G. ;

Shovkovy, I. A. ;

Wyenberg, C. M. .

PHYSICAL REVIEW B, 2009, 79 (11)

[6] Energy band-gap engineering of graphene nanoribbons [J].

Han, Melinda Y. ;

Oezyilmaz, Barbaros ;

Zhang, Yuanbo ;

Kim, Philip .

PHYSICAL REVIEW LETTERS, 2007, 98 (20)

[7] Controlled Formation of Sharp Zigzag and Armchair Edges in Graphitic Nanoribbons [J].

Jia, Xiaoting ;

Hofmann, Mario ;

Meunier, Vincent ;

Sumpter, Bobby G. ;

Campos-Delgado, Jessica ;

Romo-Herrera, Jose Manuel ;

Son, Hyungbin ;

Hsieh, Ya-Ping ;

Reina, Alfonso ;

Kong, Jing ;

Terrones, Mauricio ;

Dresselhaus, Mildred S. .

SCIENCE, 2009, 323 (5922) :1701-1705

[8] Bound states in inhomogeneous magnetic field in graphene:: Semiclassical approach [J].

Kormanyos, A. ;

Rakyta, P. ;

Oroszlany, L. ;

Cserti, J. .

PHYSICAL REVIEW B, 2008, 78 (04)

[9] Density-functional tight-binding for beginners [J].

Koskinen, Pekka ;

Makinen, Ville .

COMPUTATIONAL MATERIALS SCIENCE, 2009, 47 (01) :237-253

[10] Evidence for graphene edges beyond zigzag and armchair [J].

Koskinen, Pekka ;

Malola, Sami ;

Haekkinen, Hannu .

PHYSICAL REVIEW B, 2009, 80 (07)

← 1 2 3 →