Graphene grown on Co(0001) films and islands: Electronic structure and its precise magnetization dependence

被引：135

作者：

Varykhalov, A. ^{[1
]}

Rader, O. ^{[1
]}

机构：

[1] Elektronenspeicherring BESSY II, Helmholtz Zentrum Berlin Mat & Energie, D-12489 Berlin, Germany

来源：

PHYSICAL REVIEW B | 2009年 / 80卷 / 03期

关键词：

SPIN TRANSPORT; SURFACE; PHOTOEMISSION; RESONANCE; NI(111); CARBON; LAYERS;

D O I：

10.1103/PhysRevB.80.035437

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We achieve epitaxial growth of graphene on the ferromagnetic substrate Co(0001) by chemical vapor deposition using propylene. Structural and electronic properties are revealed by means of low-energy electron diffraction, scanning tunneling microscopy, and spin-and angle-resolved photoelectron spectroscopy. The results are compared to those of graphene/Ni(111) for which a magnetization-dependent Rashba effect has recently been reported. Bulklike Co(0001) films on W(110) can be separated into islands by heating, and subsequently they can be covered by graphene. Such system is used to present unambiguous proof that in graphene/Co(0001) there is no Rashba effect and no intrinsic dependence of the band dispersion on the magnetization occurs. The high spin polarization of secondary electrons reported for graphene/Ni(111) is confirmed for graphene/Co(0001) with higher values (similar to 25%) due to the larger magnetic moment of Co.

引用

页数：6

共 32 条

[1] Structure and magnetism of self-organized Co islands [J].

Bansmann, J ;

Lu, L ;

Senz, V ;

Bettac, A ;

Getzlaff, M ;

Meiwes-Broer, KH .

EUROPEAN PHYSICAL JOURNAL D, 1999, 9 (1-4) :461-466

[2] First-principles calculation of the electronic structure and EELS spectra at the graphene/Ni(III) interface [J].

Bertoni, G ;

Calmels, L ;

Altibelli, A ;

Serin, V .

PHYSICAL REVIEW B, 2005, 71 (07)

[3] Quasiparticle dynamics in graphene [J].

Bostwick, Aaron ;

Ohta, Taisuke ;

Seyller, Thomas ;

Horn, Karsten ;

Rotenberg, Eli .

NATURE PHYSICS, 2007, 3 (01) :36-40

[4] HIGH-EFFICIENCY RETARDING-POTENTIAL MOTT POLARIZATION ANALYZER [J].

BURNETT, GC ;

MONROE, TJ ;

DUNNING, FB .

REVIEW OF SCIENTIFIC INSTRUMENTS, 1994, 65 (06) :1893-1896

[5] Biased bilayer graphene: Semiconductor with a gap tunable by the electric field effect [J].

Castro, Eduardo V. ;

Novoselov, K. S. ;

Morozov, S. V. ;

Peres, N. M. R. ;

Dos Santos, J. M. B. Lopes ;

Nilsson, Johan ;

Guinea, F. ;

Geim, A. K. ;

Castro Neto, A. H. .

PHYSICAL REVIEW LETTERS, 2007, 99 (21)

[6] Rashba effect in the graphene/Ni(111) system [J].

Dedkov, Yu. S. ;

Fonin, M. ;

Ruediger, U. ;

Laubschat, C. .

PHYSICAL REVIEW LETTERS, 2008, 100 (10)

[7] A possible source of spin-polarized electrons: The inert graphene/Ni(111) system [J].

Dedkov, Yu. S. ;

Fonin, M. ;

Laubschat, C. .

APPLIED PHYSICS LETTERS, 2008, 92 (05)

[8] Photoemission from bulk bands along the surface normal of W(110) [J].

Feydt, J ;

Elbe, A ;

Engelhard, H ;

Meister, G ;

Jung, C ;

Goldmann, A .

PHYSICAL REVIEW B, 1998, 58 (20) :14007-14012

[9] SPIN-ORBIT-INTERACTION-INDUCED SURFACE RESONANCE ON W(011) [J].

GAYLORD, RH ;

KEVAN, SD .

PHYSICAL REVIEW B, 1987, 36 (17) :9337-9340

[10] Atomic-scale investigation of graphene formation on 6H-SiC(0001) [J].

Guisinger, N. P. ;

Rutter, G. M. ;

Crain, J. N. ;

Heiliger, C. ;

First, P. N. ;

Stroscio, J. A. .

JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A, 2008, 26 (04) :932-937

← 1 2 3 4 →