Search Results - "Nunes, Ricardo W."

Lattice Relaxation at the Interface of Two-Dimensional Crystals: Graphene and Hexagonal Boron-Nitride by Lu, Jiong, Gomes, Lídia C, Nunes, Ricardo W, Castro Neto, A. H, Loh, Kian Ping

“…Heteroepitaxy of two-dimensional (2D) crystals, such as hexagonal boron nitride (BN) on graphene (G), can occur at the edge of an existing heterointerface…”
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Topologically Protected Metallic States Induced by a One-Dimensional Extended Defect in the Bulk of a 2D Topological Insulator by Lima, Erika N, Schmidt, Tome M, Nunes, Ricardo W

“…We report ab initio calculations showing that a one-dimensional extended defect generates topologically protected metallic states immersed in the bulk of…”
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Origin of the Giant Enhanced Raman Scattering by Sulfur Chains Encapsulated inside Single-Wall Carbon Nanotubes by Nascimento, Viviane V, Neves, Wellington Q, Alencar, Rafael S, Li, Guanghui, Fu, Chengyin, Haddon, Robert C, Bekyarova, Elena, Guo, Juchen, Alexandre, Simone S, Nunes, Ricardo W, Souza Filho, Antonio G, Fantini, Cristiano

“…In this work, we explain the origin and the mechanism responsible for the strong enhancement of the Raman signal of sulfur chains encapsulated by single-wall…”
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Raman spectrum of layered jacutingaite (Pt2HgSe3) crystals—Experimental and theoretical study by Longuinhos, Raphael, Vymazalová, Anna, Cabral, Alexandre R., Alexandre, Simone S., Nunes, Ricardo W., Ribeiro‐Soares, Jenaina

“…Jacutingaite (Pt2HgSe3) is a recently discovered layered platinum‐group mineral. Recent experimental studies have shown that it displays the properties of a…”
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Temperature dependence of the double‐resonance Raman bands in monolayer MoS2 by Gontijo, Rafael N., Gadelha, Andreij, Silveira, Orlando J., Carvalho, Bruno R., Nunes, Ricardo W., Campos, Leonardo C., Pimenta, Marcos A., Righi, Ariete, Fantini, Cristiano

“…This work reports a detailed study of the double‐resonance (DR) Raman bands of single‐layer MoS2 as a function of temperature, using many different laser…”
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Ab initio investigations on the dislocation core properties in zinc-blende semiconductors by Nunes, Ricardo W., Assali, Lucy V.C., Justo, João F.

“…Using total energy ab initio methods, we investigated the core properties of partial dislocations in GaAs. The calculations were based on the density…”
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Bistability, softening, and quenching of magnetic moments in Ni-filled carbon nanotubes by Diniz, Eduardo M., Nunes, Ricardo W., Chacham, Hélio, Mazzoni, Mário S. C.

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Methodological reconstruction of dioctahedral 1:1 phyllosilicate polytypes by Teixeira, Carlos E., Brandão, Paulo R.G., Nunes, Ricardo W.

“…The layered kaolin-group minerals are composed mainly by three polytypes: kaolinite, dickite and nacrite. The geometrical polytypic reconstruction of these…”
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Temperature dependence of the double‐resonance Raman bands in monolayer MoS 2 by Gontijo, Rafael N., Gadelha, Andreij, Silveira, Orlando J., Carvalho, Bruno R., Nunes, Ricardo W., Campos, Leonardo C., Pimenta, Marcos A., Righi, Ariete, Fantini, Cristiano

“…This work reports a detailed study of the double‐resonance (DR) Raman bands of single‐layer MoS 2 as a function of temperature, using many different laser…”
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Group-IV Pentaoctite: A New 2D Material Family by Kegler, Vanessa D, de Oliveira, Igor S. S, Pacine, Dominike, Nunes, Ricardo W, Pereira, Teldo A. S, Lima, Erika N

“…This study investigates the structural, mechanical, and electronic properties of novel two-dimensional (2D) pentaoctite (PO) monolayers composed of group-IV…”
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Bistability, softening, and quenching of magnetic moments in Ni-filled carbon nanotubes by Diniz, Eduardo M, Nunes, Ricardo W, Chacham, Hélio, Mazzoni, Mário S. C

“…Physical Review B - Volume: 81 - Issue: 15 - Article Number: 153413, 2010 The authors apply first-principles calculations to investigate the interplay between…”
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Structures of Si and Ge nanowires in the sub-nanometer range by Kagimura, Ricardo, Nunes, Ricardo W, Chacham, Helio

“…We report an ab-initio investigation of several possible Si and Ge pristine nanowires with diameters between 0.5 and 1.2 nm. We considered nanowires based on…”
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Temperature effects on dislocation core energies in silicon and germanium by Miranda, Caetano R, Nunes, Ricardo W, Antonelli, A

“…Physical Review B vol 67, paper# 235201, 2003 Temperature effects on the energetics of the 90-degree partial dislocation in silicon and germanium are…”
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Stability of antiphase line defects in nanometer-sized boron-nitride cones by Azevedo, Sergio, Mazzoni, Mario S. C, Nunes, Ricardo W, Chacham, H

“…We investigate the stability of boron nitride conical sheets of nanometer size, using first-principles calculations. Our results indicate that cones with an…”
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