1887
banner image
No data available.
Please log in to see this content.
You have no subscription access to this content.
No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
Equiconducting molecular electronic devices
Rent:
Rent this article for
USD
10.1063/1.3330900
/content/aip/journal/jcp/132/10/10.1063/1.3330900
http://aip.metastore.ingenta.com/content/aip/journal/jcp/132/10/10.1063/1.3330900

Figures

Image of FIG. 1.
FIG. 1.

The molecules forming the central part of the MEDs considered. In all the systems, carbon atoms are hybridized to form a -electron system. As customary, hydrogen atoms are omitted. Molecules one (phenafulvene), two (ethylnaphthalene), and three (ethylphenanthrene) have equiconducting connections, i.e., they can be connected to the contacts in different ways while yielding the same (at the Hückel level). The pentalene derivatives (molecules four and five), if connected appropriately, also yield identical curves.

Image of FIG. 2.
FIG. 2.

Phenafulvene connected through {4, 11} to gold electrodes. The electrodes are fcc(111) semi-infinite gold crystals of which only four layers are displayed. The sulfur atoms are placed above hollow sites of the contacts.

Image of FIG. 3.
FIG. 3.

Transmission probabilities of MEDs derived from phenafulvene [ in Fig. 1]. In each plot, two connections are compared that are defined in the insert through points of matching color. The same color is used for the corresponding curve. The connections in the first plot are equiconducting at the Hückel level, whereas the others are not. In particular, close to the Fermi energy, the curves of the equiconductors are quite similar compared with the other pairs.

Image of FIG. 4.
FIG. 4.

Current vs voltage curves of the MEDs derived from phenafulvene [ in Fig. 1]. The degree of similarity in of the different connections compared in Fig. 3 is reproduced in the curves. Connections {5,9} and {4,11} are equiconducting at the Hückel level.

Image of FIG. 5.
FIG. 5.

Transmission probabilities of the MEDs derived from ethylnaphthalene [ in Fig. 1]. In each plot, two connections are compared. The pairs of connections in the first and second plot are equiconducting at the Hückel level, whereas the others are not.

Image of FIG. 6.
FIG. 6.

Transmission probabilities of the MEDs derived from ethylphenanthrene [ in Fig. 1]. In each plot, two connections are compared. The pair of connections in the first plot is equiconducting at the Hückel level, whereas the others are not.

Image of FIG. 7.
FIG. 7.

Transmission probabilities of the MEDs constructed from pentalene derivatives [ and in Fig. 1]. Even though at the Hückel level these two MEDs are equiconducting, the KS-GF approach yields somewhat dissimilar curves.

Image of FIG. 8.
FIG. 8.

Transmission probabilities of the ethylphenanthrene and ethylnaphthalene based MEDs. The molecule-contact distance is reduced from 4.1 to 2.6 Å (2.1 Å is shown in Figs. 5 and 6). In the case of ethylphenanthrene the differential effect of the approaching contacts is dramatic and destroys the similarities in the curves.

Tables

Generic image for table
Table I.

Isospectral vertices and isospectral pairs in graphs , , and .

Loading

Article metrics loading...

/content/aip/journal/jcp/132/10/10.1063/1.3330900
2010-03-11
2014-04-16
Loading

Full text loading...

This is a required field
Please enter a valid email address
752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Equiconducting molecular electronic devices
http://aip.metastore.ingenta.com/content/aip/journal/jcp/132/10/10.1063/1.3330900
10.1063/1.3330900
SEARCH_EXPAND_ITEM