Ultrafast Relaxation of Excited Dirac Fermions in Epitaxial Graphene Using Optical Differential Transmission Spectroscopy

被引：410

作者：

Sun, Dong ^{[1
]}

Wu, Zong-Kwei ^{[1
]}

Divin, Charles ^{[1
]}

Li, Xuebin ^{[2
]}

Berger, Claire ^{[2
]}

de Heer, Walt A. ^{[2
]}

First, Phillip N. ^{[2
]}

Norris, Theodore B. ^{[1
]}

机构：

[1] Univ Michigan, Ctr Ultrafast Opt Sci, Ann Arbor, MI 48109 USA

[2] Georgia Inst Technol, Sch Phys, Atlanta, GA 30332 USA

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 15期

关键词：

D O I：

10.1103/PhysRevLett.101.157402

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We investigate the ultrafast relaxation dynamics of hot Dirac fermionic quasiparticles in multilayer epitaxial graphene using ultrafast optical differential transmission spectroscopy. We observe differential transmission spectra which are well described by interband transitions with no electron-hole interaction. Following the initial thermalization and emission of high-energy phonons, the electron cooling is determined by electron-acoustic phonon scattering, found to occur on the time scale of 1 ps for highly doped layers, and 4-11 ps in undoped layers. The spectra also provide strong evidence for the multilayer structure and doping profile of thermally grown epitaxial graphene on SiC.

引用

页数：4

共 28 条

[1] Ultrathin epitaxial graphite: 2D electron gas properties and a route toward graphene-based nanoelectronics
Berger, C
Song, ZM
Li, TB
Li, XB
Ogbazghi, AY
Feng, R
Dai, ZT
Marchenkov, AN
Conrad, EH
First, PN
de Heer, WA
[J]. JOURNAL OF PHYSICAL CHEMISTRY B, 2004, 108 (52) : 19912 - 19916
[2] Electronic confinement and coherence in patterned epitaxial graphene
Berger, Claire
Song, Zhimin
Li, Xuebin
Wu, Xiaosong
Brown, Nate
Naud, Cecile
Mayou, Didier
Li, Tianbo
Hass, Joanna
Marchenkov, Atexei N.
Conrad, Edward H.
First, Phillip N.
de Heer, Wait A.
[J]. SCIENCE, 2006, 312 (5777) : 1191 - 1196
[3] Hot electron relaxation and phonon dynamics in graphene
Butscher, S.
Milde, F.
Hirtschulz, M.
Malic, E.
Knorr, A.
[J]. APPLIED PHYSICS LETTERS, 2007, 91 (20)
[4] DARANCET P, ARXIV07110940
[5] Measurement of ultrafast carrier dynamics in epitaxial graphene
Dawlaty, Jahan M.
Shivaraman, Shriram
Chandrashekhar, Mvs
Rana, Farhan
Spencer, Michael G.
[J]. APPLIED PHYSICS LETTERS, 2008, 92 (04)
[6] Epitaxial graphene
de Heer, Walt A.
Berger, Claire
Wu, Xiaosong
First, Phillip N.
Conrad, Edward H.
Li, Xuebin
Li, Tianbo
Sprinkle, Michael
Hass, Joanna
Sadowski, Marcin L.
Potemski, Marek
Martinez, Gerard
[J]. SOLID STATE COMMUNICATIONS, 2007, 143 (1-2) : 92 - 100
[7] Few-layer graphene on SiC, pyrolitic graphite, and graphene:: A Raman scattering study
Faugeras, C.
Nerriere, A.
Potemski, M.
Mahmood, A.
Dujardin, E.
Berger, C.
de Heer, W. A.
[J]. APPLIED PHYSICS LETTERS, 2008, 92 (01)
[8] Unusual microwave response of Dirac quasiparticles in graphene
Gusynin, V. P.
Sharapov, S. G.
Carbotte, J. P.
[J]. PHYSICAL REVIEW LETTERS, 2006, 96 (25)
[9] Structural properties of the multilayer graphene/4H-SiC(000(1) overbar) system as determined by surface x-ray diffraction
Hass, J.
Feng, R.
Millan-Otoya, J. E.
Li, X.
Sprinkle, M.
First, P. N.
de Heer, W. A.
Conrad, E. H.
Berger, C.
[J]. PHYSICAL REVIEW B, 2007, 75 (21):
[10] Why multilayer graphene on 4H-SiC(000(1)over-bar) behaves like a single sheet of graphene
Hass, J.
Varchon, F.
Millan-Otoya, J. E.
Sprinkle, M.
Sharma, N.
De Heer, W. A.
Berger, C.
First, P. N.
Magaud, L.
Conrad, E. H.
[J]. PHYSICAL REVIEW LETTERS, 2008, 100 (12)

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