Exploring bound states in the continuum in graphene via NRG and DFT approaches

• Grant number: 15/26655-9
• Support type: Scholarships in Brazil - Doctorate
• Effective date (Start): June 01, 2016
• Effective date (End): May 31, 2021
• Field of knowledge: Physical Sciences and Mathematics - Physics - Condensed Matter Physics
• Principal researcher: Luiz Nunes de Oliveira
• Grantee: Luiz Henrique Bugatti Guessi
• Home Institution: Instituto de Física de São Carlos (IFSC). Universidade de São Paulo (USP). São Carlos , SP, Brazil
• Associated scholarship(s): 18/10582-0 - Non-equilibrium phenomena in two-channel Kondo problem, BE.EP.DR

Abstract

We will study the formation of bound states in the continuum (BICs) in graphene-adatom systems. Preliminary results obtained by the student and collaborators have identified such bound states in a special configuration, consisting of two adatoms symmetrically positioned with respect to a graphene sheet, one of them directly above and the other directly below the center of a carbon hexagon. For two adatoms positioned directly above and below a carbon atom, additional workby the student and his coworkers has identified a quantum phase transition. Motivated by the success of these preliminary studies, we plan to further investigate the properties of the system on the basis of a Density-Functional study complemented by numerical renormalization-group computations. We expect the project to yield deeper understanding of the physics of adsorption and of the formation of BICs. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

GUESSI, L. H.; DESSOTTI, F. A.; MARQUES, Y.; RICCO, L. S.; PEREIRA, G. M.; MENEGASSO, P.; DE SOUZA, M.; SERIDONIO, A. C. Encrypting Majorana fermion qubits as bound states in the continuum. Physical Review B, v. 96, n. 4 JUL 13 2017. Web of Science Citations: 10.

DESSOTTI, F. A.; RICCO, L. S.; MARQUES, Y.; GUESSI, L. H.; YOSHIDA, M.; FIGUEIRA, M. S.; DE SOUZA, M.; SODANO, PASQUALE; SERIDONIO, A. C. Unveiling Majorana quasiparticles by a quantum phase transition: Proposal of a current switch. Physical Review B, v. 94, n. 12 SEP 16 2016. Web of Science Citations: 9.

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

GUESSI, Luiz Henrique Bugatti. Linear and non-linear transport properties of quantum-dot devices. 2021. Doctoral Thesis - Universidade de São Paulo (USP). Instituto de Física de São Carlos (IFSC/BT) São Carlos.