Effect of Axial Torsion on sp Carbon Atomic Wires

Luca Ravagnan, Nicola Manini, Eugenio Cinquanta, Giovanni Onida, Davide Sangalli, Carlo Motta, Michele Devetta, Andrea Bordoni, Paolo Piseri, and Paolo Milani
Phys. Rev. Lett. 102, 245502 – Published 17 June 2009

Abstract

Ab initio calculations within density-functional theory combined with experimental Raman spectra on cluster-beam deposited pure-carbon films provide a consistent picture of sp-carbon chains stabilized by sp3 or sp2 terminations, the latter being sensitive to torsional strain. This unexplored effect promises many exciting applications since it allows one to modify the conductive states near the Fermi level and to switch on and off the on-chain π-electron magnetism.

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  • Received 9 February 2009

DOI:https://doi.org/10.1103/PhysRevLett.102.245502

©2009 American Physical Society

Authors & Affiliations

Luca Ravagnan1,2, Nicola Manini1,3, Eugenio Cinquanta1,2,*, Giovanni Onida1,3,†, Davide Sangalli1,3, Carlo Motta1,3, Michele Devetta1,2, Andrea Bordoni1,2, Paolo Piseri1,2, and Paolo Milani1,2,‡

  • 1Dipartimento di Fisica, Università degli Studi di Milano, Via Celoria 16, 20133 Milano, Italy
  • 2CIMAINA, Via Celoria 16, 20133 Milano, Italy
  • 3European Theoretical Spectroscopy Facility, Via Celoria 16, 20133 Milano, Italy

  • *Present address: Materials Science Department, University of Milan Bicocca, Via Cozzi 53, 20125 Milano, Italy
  • giovanni.onida@mi.infn.it
  • pmilani@mi.infn.it

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Issue

Vol. 102, Iss. 24 — 19 June 2009

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