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Volumn 59, Issue 12, 1999, Pages R7852-R7855

Negative differential resistance in the scanning-tunneling spectroscopy of organic molecules

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Indexed keywords


EID: 0000067215     PISSN: 10980121     EISSN: 1550235X     Source Type: Journal    
DOI: 10.1103/PhysRevB.59.R7852     Document Type: Article
Times cited : (270)

References (24)
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    • Datta, S.1
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    • M. A. Reed, et al., Science 278, 252 (1997), and references therein.
    • (1997) Science , vol.278 , pp. 252
    • Reed, M.A.1
  • 6
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    • I.-W. Lyo and Ph. Avouris, Science 245, 1369 (1989).
    • (1989) Science , vol.245 , pp. 1369
  • 7
    • 85037904384 scopus 로고    scopus 로고
    • Scanning Tunneling Microscopy III, edited by R. Wiesendanger and H.-J. Güntherodt (Springer-Verlag, Berlin, 1993).
    • Scanning Tunneling Microscopy III, edited by R. Wiesendanger and H.-J. Güntherodt (Springer-Verlag, Berlin, 1993).
  • 9
    • 85037917865 scopus 로고    scopus 로고
    • Technically, Pt/Ir tips with composition 80:20 were used (Ir atoms have little effect on the tip electronic structure).
    • Technically, Pt/Ir tips with composition 80:20 were used (Ir atoms have little effect on the tip electronic structure).
  • 10
    • 85037912059 scopus 로고    scopus 로고
    • Seunghun Hong, Ph.D thesis, Department of Physics, Purdue University, 1998.
    • Seunghun Hong, Ph.D thesis, Department of Physics, Purdue University, 1998.
  • 12
  • 13
  • 17
    • 85037898044 scopus 로고    scopus 로고
    • Under zero bias, both (Formula presented) and (Formula presented) are equal to the equilibrium Fermi energy of the STM/molecule system (Formula presented) which can be determined in principle using the relation (Formula presented) (Formula presented) is the number of electrons in the molecule, see Ref. 1). However, the calculated (Formula presented) is extremely sensitive to small changes in N, making it better to use (Formula presented) as a fitting parameter.
    • Under zero bias, both (Formula presented) and (Formula presented) are equal to the equilibrium Fermi energy of the STM/molecule system (Formula presented) which can be determined in principle using the relation (Formula presented) (Formula presented) is the number of electrons in the molecule, see Ref. 1). However, the calculated (Formula presented) is extremely sensitive to small changes in N, making it better to use (Formula presented) as a fitting parameter.
  • 20
    • 85037882235 scopus 로고    scopus 로고
    • Our treatment here is equivalent to replacing the molecule by a large “atom” with the same density of states, whose electrostatic potential is (Formula presented) In principle, we could have calculated the detailed electrostatic potential variation (Formula presented) within the molecule self-consistently. However, such a detailed treatment does not seem justified here in view of the empirical nature of the EHT that we are using.
    • Our treatment here is equivalent to replacing the molecule by a large “atom” with the same density of states, whose electrostatic potential is (Formula presented) In principle, we could have calculated the detailed electrostatic potential variation (Formula presented) within the molecule self-consistently. However, such a detailed treatment does not seem justified here in view of the empirical nature of the EHT that we are using.
  • 22
    • 85037879446 scopus 로고    scopus 로고
    • CRC Handbook of Chemistry and Physics (CRC Press, Boca Raton, FL, 1996).
    • CRC Handbook of Chemistry and Physics (CRC Press, Boca Raton, FL, 1996).


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.