title: Approaching an organic semimetal: Electron pockets at the Fermi level for ap-benzoquinonemonoimine zwitterion.
abstract: There is compelling evidence of electron pockets, at the Fermi level, in the band structure for an organic zwitterion molecule of thep-benzoquinonemonoimine type. The electronic structure of the zwitterion molecular film has a definite, although small, density of states evident at the Fermi level as well as a nonzero inner potential and thus is very different from a true insulator. In spite of a small Brillouin zone, significant band width is observed in the intermolecular band dispersion. The results demonstrate that Bloch's theorem applies to the wave vector dependence of the electronic band structure formed from the molecular orbitals of adjacent molecules in a molecular thin film of ap-benzoquinonemonoimine type zwitterion.
authors.affiliation: Department of Physics and Electronics, University of Puerto Rico - Humacao, Call Box 860, Humacao, PR 00792, USA ; Institute for Functional Nanomaterials, University of Puerto Rico, Facundo Bueso Bldg., San Juan, PR 00931, USA ; Department of Physics and Astronomy, Nebraska Center for Materials and Nanoscience, Theodore Jorgensen Hall, University of Nebraska-Lincoln, 855 North 16th Street, P.O. Box 880299, Lincoln, NE 68588-0299, USA.
authors.forename: Luis G
authors.initials: LG
authors.lastname: Rosa
authors.affiliation: Department of Physics and Electronics, University of Puerto Rico - Humacao, Call Box 860, Humacao, PR 00792, USA ; Institute for Functional Nanomaterials, University of Puerto Rico, Facundo Bueso Bldg., San Juan, PR 00931, USA ; Department of Physics and Astronomy, Nebraska Center for Materials and Nanoscience, Theodore Jorgensen Hall, University of Nebraska-Lincoln, 855 North 16th Street, P.O. Box 880299, Lincoln, NE 68588-0299, USA.
authors.forename: Julian
authors.initials: J
authors.lastname: Velev
authors.affiliation: Department of Physics, University of Puerto Rico, Rio Piedras, P.O. Box 23343, San Juan, PR 00931, USA.
authors.forename: Zhengzheng
authors.initials: Z
authors.lastname: Zhang
authors.affiliation: Department of Physics and Electronics, University of Puerto Rico - Humacao, Call Box 860, Humacao, PR 00792, USA.
authors.forename: Jose
authors.initials: J
authors.lastname: Alvira
authors.affiliation: Department of Physics and Electronics, University of Puerto Rico - Humacao, Call Box 860, Humacao, PR 00792, USA.
authors.forename: Omar
authors.initials: O
authors.lastname: Vega
authors.affiliation: Department of Physics and Electronics, University of Puerto Rico - Humacao, Call Box 860, Humacao, PR 00792, USA.
authors.forename: Gerson
authors.initials: G
authors.lastname: Diaz
authors.affiliation: Laboratoire de Chimie de Coordination, Institut de Chimie (UMR 7177 CNRS), Université de Strasbourg, 4 rue Blaise Pascal, 67081 Strasbourg, France.
authors.forename: Lucie
authors.initials: L
authors.lastname: Routaboul
authors.affiliation: Laboratoire de Chimie de Coordination, Institut de Chimie (UMR 7177 CNRS), Université de Strasbourg, 4 rue Blaise Pascal, 67081 Strasbourg, France.
authors.forename: Pierre
authors.initials: P
authors.lastname: Braunstein
authors.affiliation: Institut de Physique, Applique de Physique et Chimie des Matériaux de Strasbourg, Université Louis Pasteur Strasbourg, 23 rue du Lœss B.P. 20, 67034 Strasbourg, France.
authors.forename: Bernard
authors.initials: B
authors.lastname: Doudin
authors.affiliation: Institute for Functional Nanomaterials, University of Puerto Rico, Facundo Bueso Bldg., San Juan, PR 00931, USA ; The J. Bennett Johnston Sr. Center for Advanced Microstructures and Devices, Louisiana State University, 6980 Jefferson Hwy., Baton Rouge, LA 70806, USA.
authors.forename: Yaroslav B
authors.initials: YB
authors.lastname: Losovyj
authors.affiliation: Institute for Functional Nanomaterials, University of Puerto Rico, Facundo Bueso Bldg., San Juan, PR 00931, USA.
authors.forename: Peter A
authors.initials: PA
authors.lastname: Dowben
keywords: band structure; density functional theory; organic materials; photoemission; semimetals; zwitterions