Structural and electronic bistability in ZnS single sheets and single-walled nanotubes

Norawit Krainara,1,2 Jumras Limtrakul,2 Francesc Illas,1 and Stefan T. Bromley1,3,* 1Departamento de Quimica Fisica & Institut de Quimica Teorica i Computacional (IQTCUB), Universitat de Barcelona, Barcelona, Spain 2Department of Chemistry and Center for Advanced Studies in Nanotechnology and Its Applications in Chemical, Food and Agricultural Industries, Kasetsart University, Bangkok 10900, Thailand 3Institucio Catalana de Recerca i Estudis Avancats (ICREA), Barcelona, Spain (Received 28 April 2011; published 30 June 2011)