Carbon sp chains in graphene nanoholes
  Nowadays sp carbon chains terminated by graphene or graphitic-like carbon are synthesized routinely in several nanotech labs.   We propose an ab-initio study of such carbon-only materials, by computing their structure and stability, as well as their electronic, vibrational and magnetic properties.   We adopt a fair compromise of microscopic realism with a certain level of idealization in the model configurations, and predict a number of properties susceptible to comparison with experiment. 
Ivano E. Castelli, Nicola Ferri, Giovanni Onida, and Nicola Manini
cond-mat.mes-hall