Molecular electronics, negative differential resistance, and resonant tunneling in a poled molecular layer on Al/LiF electrodes having a sharp density of states

被引:15
作者
Lu, ZH
Khangura, RS
Dharma-wardana, MWC
Zgierski, MZ
Ritchie, D
机构
[1] Univ Toronto, Dept Mat Sci & Engn, Toronto, ON M5S 3E4, Canada
[2] Natl Res Council Canada, Ottawa, ON K1A 0R6, Canada
关键词
D O I
10.1063/1.1764935
中图分类号
O59 [应用物理学];
学科分类号
摘要
Density-functional calculations clarify the role of an ultrathin LiF layer on Al electrodes used in molecular electronics. The LiF layer creates. a sharp density of states (DOS), as in a scanning-tunneling microscope (STM) tip. The sharp DOS, coupled with the DOS of the molecule leads to negative differential resistance. Electron transfer between oriented molecules occurs via resonant tunneling. The I-V characteristic for a thin-film of tris (8-hydroxyquinoline)-aluminum (AIQ) molecules, oriented using electric-field poling, is in excellent agreement with theory. This molecular is a robust, simple alternative to STM or mechanical break-junction structures. (C) 2004 American Institute of Physics.
引用
收藏
页码:323 / 325
页数:3
相关论文
共 14 条
  • [1] DENSITY-FUNCTIONAL THERMOCHEMISTRY .3. THE ROLE OF EXACT EXCHANGE
    BECKE, AD
    [J]. JOURNAL OF CHEMICAL PHYSICS, 1993, 98 (07) : 5648 - 5652
  • [2] DHARMAWARDANA MWC, 2002, J OPT A-PURE APPL OP, V4, P278
  • [3] Chemical structure of Al/LiF/Alq interfaces in organic light-emitting diodes
    Grozea, D
    Turak, A
    Feng, XD
    Lu, ZH
    Johnson, D
    Wood, R
    [J]. APPLIED PHYSICS LETTERS, 2002, 81 (17) : 3173 - 3175
  • [4] Metal-induced gap states at well defined alkali-halide/metal interfaces
    Kiguchi, M
    Arita, R
    Yoshikawa, G
    Tanida, Y
    Katayama, M
    Saiki, K
    Koma, A
    Aoki, H
    [J]. PHYSICAL REVIEW LETTERS, 2003, 90 (19) : 4
  • [5] SPECTROSCOPY OF SINGLE ATOMS IN THE SCANNING TUNNELING MICROSCOPE
    LANG, ND
    [J]. PHYSICAL REVIEW B, 1986, 34 (08): : 5947 - 5950
  • [6] RESISTANCE OF ATOMIC WIRES
    LANG, ND
    [J]. PHYSICAL REVIEW B, 1995, 52 (07) : 5335 - 5342
  • [7] DEVELOPMENT OF THE COLLE-SALVETTI CORRELATION-ENERGY FORMULA INTO A FUNCTIONAL OF THE ELECTRON-DENSITY
    LEE, CT
    YANG, WT
    PARR, RG
    [J]. PHYSICAL REVIEW B, 1988, 37 (02): : 785 - 789
  • [8] Electron transport in molecular wire junctions
    Nitzan, A
    Ratner, MA
    [J]. SCIENCE, 2003, 300 (5624) : 1384 - 1389
  • [9] Petty M.C., 1995, INTRO MOL ELECT, DOI DOI 10.1021/ja053200p
  • [10] Conductance of a molecular junction
    Reed, MA
    Zhou, C
    Muller, CJ
    Burgin, TP
    Tour, JM
    [J]. SCIENCE, 1997, 278 (5336) : 252 - 254