Conductance of a photochromic molecular switch with graphene leads

C. Motta, M. I. Trioni, G. P. Brivio, and K. L. Sebastian
Phys. Rev. B 84, 113408 – Published 19 September 2011

Abstract

We report a full self-consistent ab initio calculation of the conductance of a diarylethene-based molecular switch with two graphene electrodes. Our results show the contributions of the resonant states of the molecule, of the electrode density of states, and of graphene unique features, such as edge states. The conductivities are found to be significantly different for the two photochromic isomers at zero and finite applied bias. Further we point out the possibility of causing the switching by the application of a large potential difference between the two electrodes.

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  • Received 24 June 2011

DOI:https://doi.org/10.1103/PhysRevB.84.113408

©2011 American Physical Society

Authors & Affiliations

C. Motta*

  • Dipartimento di Scienza dei Materiali and Corimav Pirelli, Università di Milano-Bicocca, via Cozzi 53, IT-20125 Milano, Italy

M. I. Trioni

  • CNR - National Research Council of Italy, ISTM, Via Golgi 19, IT-20133 Milano, Italy

G. P. Brivio

  • CNISM, ETSF, and Dipartimento di Scienza dei Materiali, Università di Milano-Bicocca, via Cozzi 53, IT-20125 Milano, Italy

K. L. Sebastian

  • Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore, India

  • *c.motta10@campus.unimib.it

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Issue

Vol. 84, Iss. 11 — 15 September 2011

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