Strong Charge-Transfer Excitonic Effects and the Bose-Einstein Exciton Condensate in Graphane

被引：173

作者：

Cudazzo, Pierluigi ^{[1
,2
,6
]}

Attaccalite, Claudio ^{[3
]}

Tokatly, Ilya V. ^{[1
,2
,4
,6
]}

Rubio, Angel ^{[1
,2
,5
]}

机构：

[1] Univ Basque Country, Nanobio Spect Grp, EHU,MPC, Ctr Fis Mat,CSIC, E-20018 San Sebastian, Spain

[2] Univ Basque Country, ETSF Sci Dev Ctr, Ctr Fis Mat CSIC UPV EHU MPC, Dpto Fis Mat, E-20018 San Sebastian, Spain

[3] CNRS UJF, Inst Neel, Grenoble, France

[4] Basque Fdn Sci, IKERBASQUE, E-48011 Bilbao, Spain

[5] Max Planck Gesell, Fritz Haber Inst, Theory Dept, D-14195 Berlin, Germany

[6] DIPC, E-20018 San Sebastian, Spain

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 104卷 / 22期

关键词：

GREENS-FUNCTION; GRAPHENE;

D O I：

10.1103/PhysRevLett.104.226804

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Using first principles many-body theory methods (GW+Bethe-Salpeter equation) we demonstrate that the optical properties of graphane are dominated by localized charge-transfer excitations governed by enhanced electron correlations in a two-dimensional dielectric medium. Strong electron-hole interaction leads to the appearance of small radius bound excitons with spatially separated electron and hole, which are localized out of plane and in plane, respectively. The presence of such bound excitons opens the path towards an excitonic Bose-Einstein condensate in graphane that can be observed experimentally.

引用

页数：4

共 28 条

[1]

Bir G. L., 1974, SYMMETRY STRAIN INDU

[2] Towards Bose-Einstein condensation of excitons in potential traps [J].

Butov, LV ;

Lai, CW ;

Ivanov, AL ;

Gossard, AC ;

Chemla, DS .

NATURE, 2002, 417 (6884) :47-52

[3] Excitons in carbon nanotubes:: An ab initio symmetry-based approach -: art. no. 196401 [J].

Chang, E ;

Bussi, G ;

Ruini, A ;

Molinari, E .

PHYSICAL REVIEW LETTERS, 2004, 92 (19) :196401-1

[4]

CUDAZZO P, IN PRESS

[5] Control of Graphene's Properties by Reversible Hydrogenation: Evidence for Graphane [J].

Elias, D. C. ;

Nair, R. R. ;

Mohiuddin, T. M. G. ;

Morozov, S. V. ;

Blake, P. ;

Halsall, M. P. ;

Ferrari, A. C. ;

Boukhvalov, D. W. ;

Katsnelson, M. I. ;

Geim, A. K. ;

Novoselov, K. S. .

SCIENCE, 2009, 323 (5914) :610-613

[6] Graphene: Status and Prospects [J].

Geim, A. K. .

SCIENCE, 2009, 324 (5934) :1530-1534

[7] Making Graphene Luminescent by Oxygen Plasma Treatment [J].

Gokus, T. ;

Nair, R. R. ;

Bonetti, A. ;

Boehmler, M. ;

Lombardo, A. ;

Novoselov, K. S. ;

Geim, A. K. ;

Ferrari, A. C. ;

Hartschuh, A. .

ACS NANO, 2009, 3 (12) :3963-3968

[8] NEW METHOD FOR CALCULATING 1-PARTICLE GREENS FUNCTION WITH APPLICATION TO ELECTRON-GAS PROBLEM [J].

HEDIN, L .

PHYSICAL REVIEW, 1965, 139 (3A) :A796-+

[9] Bose-Einstein condensation of exciton polaritons [J].

Kasprzak, J. ;

Richard, M. ;

Kundermann, S. ;

Baas, A. ;

Jeambrun, P. ;

Keeling, J. M. J. ;

Marchetti, F. M. ;

Szymanska, M. H. ;

Andre, R. ;

Staehli, J. L. ;

Savona, V. ;

Littlewood, P. B. ;

Deveaud, B. ;

Dang, Le Si .

NATURE, 2006, 443 (7110) :409-414

[10] SELF-CONSISTENT EQUATIONS INCLUDING EXCHANGE AND CORRELATION EFFECTS [J].

KOHN, W ;

SHAM, LJ .

PHYSICAL REVIEW, 1965, 140 (4A) :1133-&

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