Bistable molecular conductors with a field-switchable dipole group

A class of bistable ``stator-rotor'' molecules is proposed, where a stationary bridge (stator) connects the two electrodes and facilitates electron transport between them. The rotor part, which has a large dipole moment, is attached to an atom of the stator via a single sigma bond. Hydrogen bonds formed between the rotor and stator make the symmetric orientation of the dipole unstable. The rotor has two potential minima with equal energy for rotation about the sigma bond. The dipole orientation, which determines the conduction state of the molecule, can be switched by an external electric field that changes the relative energy of the two potential minima. Both orientations of the rotor correspond to asymmetric current-voltage characteristics that are the reverse of each other, so they are distinguishable electrically. Such bistable stator-rotor molecules could potentially be used as parts of molecular electronic devices.

[1]  Walter A. Harrison,et al.  Electronic structure and the properties of solids , 1980 .

[2]  D. Papaconstantopoulos,et al.  Handbook of the Band Structure of Elemental Solids , 1986 .

[3]  A. Ulman,et al.  Structure and binding of alkanethiolates on gold and silver surfaces: implications for self-assembled monolayers , 1993 .

[4]  J. Tour,et al.  Are Single Molecular Wires Conducting? , 1996, Science.

[5]  M. Reed,et al.  Conductance of a Molecular Junction , 1997 .

[6]  Stoddart,et al.  Electronically configurable molecular-based logic gates , 1999, Science.

[7]  C. J. Lambert,et al.  General Green’s-function formalism for transport calculations with spd Hamiltonians and giant magnetoresistance in Co- and Ni-based magnetic multilayers , 1999 .

[8]  J. F. Stoddart,et al.  A [2]Catenane-Based Solid State Electronically Reconfigurable Switch , 2000 .

[9]  David J. Schiffrin,et al.  A nanometre-scale electronic switch consisting of a metal cluster and redox-addressable groups , 2000, Nature.

[10]  John K. Tomfohr,et al.  Reproducible Measurement of Single-Molecule Conductivity , 2001, Science.

[11]  Orientational dependence of current through molecular films , 2001, cond-mat/0102307.

[12]  Hongkun Park,et al.  Kondo resonance in a single-molecule transistor , 2002, Nature.

[13]  R Ochs,et al.  Driving current through single organic molecules. , 2001, Physical review letters.

[14]  R. Williams,et al.  Current rectification by molecules with asymmetric tunneling barriers , 2002, cond-mat/0206002.

[15]  Jonas I. Goldsmith,et al.  Coulomb blockade and the Kondo effect in single-atom transistors , 2002, Nature.