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Volumn 6, Issue 2, 2006, Pages 258-262

Inelastic transport through molecules: Comparing first-principles calculations to experiments

Author keywords

[No Author keywords available]

Indexed keywords

ELASTICITY; ELECTRODES; GOLD; GREEN'S FUNCTION; MOLECULAR DYNAMICS; PROBABILITY DENSITY FUNCTION; VIBRATIONS (MECHANICAL);

EID: 33644967501     PISSN: 15306984     EISSN: None     Source Type: Journal    
DOI: 10.1021/nl052224r     Document Type: Article
Times cited : (140)

References (26)
  • 11
    • 42749108292 scopus 로고    scopus 로고
    • Erratum Phys. Rev. Lett. 2005, 94, 099901 (E)
    • Asai, Y. Phys. Rev. Lett. 2004, 93, 246102. Erratum Phys. Rev. Lett. 2005, 94, 099901 (E).
    • (2004) Phys. Rev. Lett. , vol.93 , pp. 246102
    • Asai, Y.1
  • 17
    • 33644978810 scopus 로고    scopus 로고
    • Frederiksen, T.; et al. In preparation
    • Frederiksen, T.; et al. In preparation.
  • 19
    • 33644983821 scopus 로고    scopus 로고
    • note
    • We employ the PBE generalized gradient functional, the Γ-point approximation, double ζ-polarized (DZP) basis sets for the atoms of the molecule, single ζ-polarized (SZP) for the Au atoms, and a real space grid energy cutoff of 200 Ry.
  • 20
    • 33644988804 scopus 로고    scopus 로고
    • note
    • 21 and artificial direct coupling between the contacts caused by the periodic boundary conditions removed.
  • 22
    • 33644982016 scopus 로고    scopus 로고
    • note
    • The LOE approximations were confirmed to be quantitatively accurate by comparison to the inelastic signal from the full SCBA solution for the following two test systems: (i) a simple two-level model designed to mimic the HOMO-LUMO of a molecule and (ii) the OPE molecule described within DFT but with a minimal basis set, limited to the 10 most important vibrational modes, and a device and vibrational subspace only consisting of the molecule. Full SCBA calculations on larger systems are computationally infeasible. The SCBA calculations on the OPE molecule required approximately 100 CPU hours (P4 processors).
  • 25
    • 33644983555 scopus 로고    scopus 로고
    • note
    • The relaxed geometries used in this work have the sulfur atom at the hollow position on the Au(111) surface. We cannot rule out that different Au-S bonding configurations will give qualitatively different inelastic signals for the Au-S vibration. However, in one test calculation, we found the on-top position to be unstable for the OPE molecule.
  • 26
    • 33644989926 scopus 로고    scopus 로고
    • note
    • The LOE approximation gives a bias independent elastic conductance. Retaining the bias dependence in the elastic conductance may contribute significantly to the background signal.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.