Tuning the bipolar conductance of an alkali-doped C60 layer sandwiched between two tunneling barriers

Christophe Silien; Ning Liu; Nilay A. Pradhan; Wilson Ho

doi:10.1021/nl0483744

Tuning the bipolar conductance of an alkali-doped C60 layer sandwiched between two tunneling barriers

Christophe Silien, Ning Liu, Nilay A. Pradhan, Wilson Ho

Department of Physics

Research output: Contribution to journal › Article › peer-review

Abstract

Resonant tunneling through a C₆₀ monolayer doped with single Na, K, Rb, and Cs atoms was measured between the tip of a scanning tunneling microscope and a NiAl(110) substrate. By supporting the monolayer on a thin aluminum oxide film grown on the substrate, a double barrier tunnel junction is formed, consisting of the vacuum and oxide. This geometry enables conductance through an electronic state of the alkali-C₆₀ complex at both positive and negative sample bias. The positions of the conductance peaks can be varied by tuning the vacuum barrier. An opposite variation is found for Na and K as compared to Rb and Cs, suggesting the influence of bonding on nanoscale transport.

Original language	English (Ireland)
Pages (from-to)	55-59
Number of pages	5
Journal	Nano Letters
Volume	5
Issue number	1
DOIs	https://doi.org/10.1021/nl0483744
Publication status	Published - Jan 2005

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abstract = "Resonant tunneling through a C60 monolayer doped with single Na, K, Rb, and Cs atoms was measured between the tip of a scanning tunneling microscope and a NiAl(110) substrate. By supporting the monolayer on a thin aluminum oxide film grown on the substrate, a double barrier tunnel junction is formed, consisting of the vacuum and oxide. This geometry enables conductance through an electronic state of the alkali-C60 complex at both positive and negative sample bias. The positions of the conductance peaks can be varied by tuning the vacuum barrier. An opposite variation is found for Na and K as compared to Rb and Cs, suggesting the influence of bonding on nanoscale transport.",

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AU - Ho, Wilson

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Y1 - 2005/1

N2 - Resonant tunneling through a C60 monolayer doped with single Na, K, Rb, and Cs atoms was measured between the tip of a scanning tunneling microscope and a NiAl(110) substrate. By supporting the monolayer on a thin aluminum oxide film grown on the substrate, a double barrier tunnel junction is formed, consisting of the vacuum and oxide. This geometry enables conductance through an electronic state of the alkali-C60 complex at both positive and negative sample bias. The positions of the conductance peaks can be varied by tuning the vacuum barrier. An opposite variation is found for Na and K as compared to Rb and Cs, suggesting the influence of bonding on nanoscale transport.

AB - Resonant tunneling through a C60 monolayer doped with single Na, K, Rb, and Cs atoms was measured between the tip of a scanning tunneling microscope and a NiAl(110) substrate. By supporting the monolayer on a thin aluminum oxide film grown on the substrate, a double barrier tunnel junction is formed, consisting of the vacuum and oxide. This geometry enables conductance through an electronic state of the alkali-C60 complex at both positive and negative sample bias. The positions of the conductance peaks can be varied by tuning the vacuum barrier. An opposite variation is found for Na and K as compared to Rb and Cs, suggesting the influence of bonding on nanoscale transport.

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JO - Nano Letters

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Tuning the bipolar conductance of an alkali-doped C60 layer sandwiched between two tunneling barriers

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