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Rotation and Anisotropic Molecular Orbital Effect in a Single H2TPP Molecule Transistor

Shuichi Sakata, Kenji Yoshida, Yuichi Kitagawa, Kazuyuki Ishii, and Kazuhiko Hirakawa
Phys. Rev. Lett. 111, 246806 – Published 12 December 2013
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Electron transport through a single molecule is determined not only by the intrinsic properties of the molecule but also by the configuration of the molecule with respect to the lead electrodes. Here, we show how electron transport through a single H2TPP molecule is modulated by changes in the configuration. The Coulomb stability diagram of a single H2TPP molecule transistor exhibited a few different patterns in different measurement scans. Furthermore, the sample exhibited negative differential resistance, the magnitude of which changed with the pattern in the Coulomb stability diagram. Such behavior can be explained by the rotation of the molecule with anisotropic molecular orbitals in the gap electrodes induced by electrical stress. Moreover, we find that the energy separations between molecular orbitals are also affected by the rotation, confirming that the metal-molecule interface configuration renormalizes the electronic levels in the molecule.

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  • Received 23 September 2013


© 2013 American Physical Society

Authors & Affiliations

Shuichi Sakata1, Kenji Yoshida1, Yuichi Kitagawa1, Kazuyuki Ishii1, and Kazuhiko Hirakawa1,2

  • 1Institute of Industrial Science and INQIE, the University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan
  • 2CREST-JST, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan

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Vol. 111, Iss. 24 — 13 December 2013

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Heating up of Superconductors
January 27, 2017

This collection marks the 30th anniversary of the discovery of high-temperature superconductors. The papers selected highlight some of the advances that have been made to date, both in understanding why these compounds behave in the way they do, and in utilizing them in applications. The papers included in the collection have been made free to read.

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