Carrier transport in two-dimensional graphene layers

被引:1058
作者
Hwang, E. H. [1 ]
Adam, S. [1 ]
Das Sarma, S. [1 ]
机构
[1] Univ Maryland, Condensed Matter Theory Ctr, Dept Phys, College Pk, MD 20742 USA
关键词
17;
D O I
10.1103/PhysRevLett.98.186806
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Carrier transport in gated 2D graphene monolayers is considered in the presence of scattering by random charged impurity centers with density n(i). Excellent quantitative agreement is obtained (for carrier density n > 10(12) cm(-2)) with existing experimental data. The conductivity scales linearly with n/n(i) in the theory. We explain the experimentally observed asymmetry between electron and hole conductivities, and the high-density saturation of conductivity for the highest mobility samples. We argue that the experimentally observed saturation of conductivity at low density arises from the charged impurity induced inhomogeneity in the graphene carrier density which becomes severe for n less than or similar to n(i)similar to 10(12) cm(-2).
引用
收藏
页数:4
相关论文
共 17 条
[1]   Effect of disorder on transport in graphene [J].
Aleiner, I. L. ;
Efetov, K. B. .
PHYSICAL REVIEW LETTERS, 2006, 97 (23)
[2]   Friedel oscillations, impurity scattering, and temperature dependence of resistivity in graphene [J].
Cheianov, Vadim V. ;
Fal'ko, Vladimir I. .
PHYSICAL REVIEW LETTERS, 2006, 97 (22)
[3]   Metallicity and its low-temperature behavior in dilute two-dimensional carrier systems [J].
Das Sarma, S ;
Hwang, EH .
PHYSICAL REVIEW B, 2004, 69 (19) :195305-1
[4]   Charged impurity-scattering-limited low-temperature resistivity of low-density silicon inversion layers [J].
Das Sarma, S ;
Hwang, EH .
PHYSICAL REVIEW LETTERS, 1999, 83 (01) :164-167
[5]   CRITICAL-BEHAVIOR OF DISORDERED DEGENERATE SEMICONDUCTORS .1. MODELS, SYMMETRIES, AND FORMALISM [J].
FRADKIN, E .
PHYSICAL REVIEW B, 1986, 33 (05) :3257-3262
[6]  
FUHRER MS, COMMUNICATION
[7]  
Geim A. K., COMMUNICATION
[8]  
HWANG EH, IN PRESS PHYS REV B
[9]  
Kim P., private communication
[10]   INTEGER QUANTUM HALL TRANSITION - AN ALTERNATIVE APPROACH AND EXACT RESULTS [J].
LUDWIG, AWW ;
FISHER, MPA ;
SHANKAR, R ;
GRINSTEIN, G .
PHYSICAL REVIEW B, 1994, 50 (11) :7526-7552