Antibonding ground state of adatom molecules in bulk Dirac semimetals

• Autor(a) principal: Marques, Y. [UNESP]
• Data de Publicação: 2017
• Outros Autores: Obispo, A. E. [UNESP], Ricco, L. S. [UNESP], De Souza, M. [UNESP], Shelykh, I. A., Seridonio, A. C. [UNESP]
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1103/PhysRevB.96.041112; http://hdl.handle.net/11449/175017

The ground state of the diatomic molecules in nature is inevitably bonding, and its first excited state is antibonding. We demonstrate theoretically that, for a pair of distant adatoms placed buried in three-dimensional-Dirac semimetals, this natural order of the states can be reversed and an antibonding ground state occurs at the lowest energy of the so-called bound states in the continuum. We propose an experimental protocol with the use of a scanning tunneling microscope tip to visualize the topographic map of the local density of states on the surface of the system to reveal the emerging physics.