Journal
PHYSICAL REVIEW B
Volume 76, Issue 11, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.76.115316
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We estimate the conductance of molecular junctions composed of an oligo(phenylene ethynylene) (OPE) molecule sandwiched between a metallic gold or carbon nanotube on one end and a semiconducting silicon contact on the other end. Two very well defined, low and high, states of conductance (logic 0 and 1) are obtained through changes in conformation or charge states of the OPE when two metallic contacts address the molecule. However, when a combination of a semiconducting and metallic contacts are used, the bistable states are lost at low bias voltages where a flat region of nearly zero current in the current-voltage characteristic is predicted regardless of the conformation or charge state.
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