Quasimetallic behavior of carrier-polarized C60 molecular layers:: Experiment and theory -: art. no. 155440

被引：17
作者：
Lu, ZH
Lo, CC
Huang, CJ
Yuan, YY
Dharma-wardana, MWC
Zgierski, MZ
机构：
[1] Univ Toronto, Dept Mat Sci & Engn, Toronto, ON M5S 3E4, Canada
[2] Natl Res Council Canada, Ottawa, ON K1A 0R6, Canada
来源：
PHYSICAL REVIEW B | 2005年 / 72卷 / 15期
关键词：
D O I：
10.1103/PhysRevB.72.155440
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Although C-60 is an insulator with a band gap E-g of similar to 2.5 eV, we show experimentally and theoretically that E-g is strongly affected by image forces and injected charges. In sharp contrast to the Coulomb blockade typical of quantum dots, E-g is reduced by Coulomb effects. The conductance of a micron-sized C-60 film sandwiched between metal (Al, Ag, Au, Mg, and Pt) contacts is investigated. Excellent Ohmic conductance holds for C-60 layers at room temperature, on using Al/LiF bilayer contacts. Arrhenius type activated conductivity with an activation gap of similar to 0.16 eV is found.
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页数：7
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共 34 条
[21]   Molecular electronics, negative differential resistance, and resonant tunneling in a poled molecular layer on Al/LiF electrodes having a sharp density of states [J].
Lu, ZH ;
Khangura, RS ;
Dharma-wardana, MWC ;
Zgierski, MZ ;
Ritchie, D .
APPLIED PHYSICS LETTERS, 2004, 85 (02) :323-325
[22]   PHOTOEMISSION, AUTOIONIZATION, AND X-RAY-ABSORPTION SPECTROSCOPY OF ULTRATHIN-FILM C60 ON AU(110) [J].
MAXWELL, AJ ;
BRUHWILER, PA ;
NILSSON, A ;
MARTENSSON, N ;
RUDOLF, P .
PHYSICAL REVIEW B, 1994, 49 (15) :10717-10725
[23]   C-1S AUTOIONIZATION STUDY OF ELECTRON HOPPING RATES IN SOLID C-60 - COMMENT [J].
MEINDERS, MBJ ;
TJENG, LH ;
SAWATZKY, GA .
PHYSICAL REVIEW LETTERS, 1994, 73 (21) :2937-2937
[24]   WORK FUNCTION OF ELEMENTS AND ITS PERIODICITY [J].
MICHAELSON, HB .
JOURNAL OF APPLIED PHYSICS, 1977, 48 (11) :4729-4733
[25]   CHARGE-TRANSFER, DOPING, AND INTERFACE MORPHOLOGIES FOR AL-C-60 [J].
OWENS, DW ;
ALDAO, CM ;
POIRIER, DM ;
WEAVER, JH .
PHYSICAL REVIEW B, 1995, 51 (23) :17068-17072
[26]   Nanomechanical oscillations in a single-C60 transistor [J].
Park, H ;
Park, J ;
Lim, AKL ;
Anderson, EH ;
Alivisatos, AP ;
McEuen, PL .
NATURE, 2000, 407 (6800) :57-60
[27]   The Kondo effect in the presence of ferromagnetism [J].
Pasupathy, AN ;
Bialczak, RC ;
Martinek, J ;
Grose, JE ;
Donev, LAK ;
McEuen, PL ;
Ralph, DC .
SCIENCE, 2004, 306 (5693) :86-89
[28]   The electronic structure of Ag(110)c(4x4)C-60 and Au(110)(6x5)C-60 [J].
Purdie, D ;
Bernhoff, H ;
Reihl, B .
SURFACE SCIENCE, 1996, 364 (03) :279-286
[29]   Molecular electronics - Next-generation technology hits an early midlife crisis [J].
Service, RF .
SCIENCE, 2003, 302 (5645) :556-+
[30]   Ab initio modeling of open systems:: Charge transfer, electron conduction, and molecular switching of a C60 device -: art. no. 121104 [J].
Taylor, J ;
Guo, H ;
Wang, J .
PHYSICAL REVIEW B, 2001, 63 (12)
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