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2006 | 4 | 1 | 8-19
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Coulomb blockade in molecular quantum dots

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Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
The rate-equation approach is used to describe sequential tunneling through a molecular junction in the Coulomb blockade regime. Such device is composed of molecular quantum dot (with discrete energy levels) coupled with two metallic electrodes via potential barriers. Based on this model, we calculate nonlinear transport characteristics (conductance-voltage and current-voltage dependences) and compare them with the results obtained within a self-consistent field approach. It is shown that the shape of transport characteristics is determined by the combined effect of the electronic structure of molecular quantum dots and by the Coulomb blockade. In particular, the following phenomena are discussed in detail: the suppression of the current at higher voltages, the charging-induced rectification effect, the charging-generated changes of conductance gap and the temperature-induced as well as broadening-generated smoothing of current steps.
Wydawca

Czasopismo
Rocznik
Tom
4
Numer
1
Strony
8-19
Opis fizyczny
Daty
wydano
2006-03-01
online
2006-03-01
Bibliografia
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  • [9] M.A. Reed: “Molecular-scale electronics”, Proc. IEEE, Vol. 87, (1999), pp. 652–658. http://dx.doi.org/10.1109/5.752520[Crossref]
  • [10] M. Burghard, C. Mueller-Schwanneke, G. Philipp and S. Roth: “Coulomb blockade phenomena in ultrathin Langmuir-Blodgett sandwich junctions”, J. Phys.: Condens. Matter, Vol. 11, (1999), pp. 2993–3002. http://dx.doi.org/10.1088/0953-8984/11/14/015[Crossref]
  • [11] J. Park, A.N. Pasupathy, J.I. Goldsmith, C. Chang, Y. Yaish, J.R. Petta, M. Rinkoski, J.P. Sethna, H.D. Abruna, P.L. McEuen and D.C. Ralph: “Coulomb blockade and the Kondo effect in single-atom transistors”, Nature (London), Vol. 417, (2002), pp. 722–725. http://dx.doi.org/10.1038/nature00791[Crossref]
  • [12] K. Walczak: “Charging effects in biased molecular devices”, Physica E, Vol. 25, (2005), pp. 530–534. http://dx.doi.org/10.1016/j.physe.2004.08.102[Crossref]
  • [13] M.M. Deshmukh, E. Bonet, A.N. Pasupathy and D.C. Ralph: “Equilibrium and nonequilibrium electron tunneling via discrete quantum states”, Phys. Rev. B, Vol. 65, (2002), pp. 073301.
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  • [17] E. Bonet, M.M. Deshmukh and D.C. Ralph: “Solving rate equations for electron tunneling via discrete quantum states”, Phys. Rev. B, Vol. 65, (2002), pp. 045317.
  • [18] S. Datta: “Electrical resistance: an atomistic view”, Nanotechnology, Vol. 15, (2004), pp. S433–S451; Appendix A. http://dx.doi.org/10.1088/0957-4484/15/7/051[Crossref]
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  • [20] N.D. Lang and Ph. Avouris: “Carbon-atom wires: charge-transfer doping, voltage drop, and the effect of distortions”, Phys. Rev. Lett., Vol. 84, (2000), pp. 358–361. http://dx.doi.org/10.1103/PhysRevLett.84.358[Crossref]
  • [21] M. Di Ventra, S.T. Pantelides and N.D. Lang: “First-principles calculations of transport properties of a molecular device”, Phys. Rev. Lett., Vol. 84, (2000), pp. 979–982. http://dx.doi.org/10.1103/PhysRevLett.84.979[Crossref]
  • [22] A.S. Alexandrov, A.M. Bratkovsky and R.S. Williams: “Bistable tunneling current through a molecular quantum dot”, Phys. Rev. B, Vol. 67, (2003), pp. 075301.
  • [23] J.A. Wilson: “Developments in the negative U-modelling of the cuprate HTSC systems”, J. Phys.: Condens. Matter, Vol. 13, (2001), pp. R945–R977. http://dx.doi.org/10.1088/0953-8984/13/50/201[Crossref]
  • [24] K. Walczak: “Nonlinear transport through a finite Hubbard chain connected to the electrodes”, Physica B, Vol. 365, (2005), pp. 193–200. http://dx.doi.org/10.1016/j.physb.2005.05.014[Crossref]
Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.-psjd-doi-10_1007_s11534-005-0002-x
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