Rafael R. Barreto

ORCID: 0000-0002-4658-5855
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About
Contact & Profiles
Research Areas
  • 2D Materials and Applications
  • Nanowire Synthesis and Applications
  • Advanced Fiber Optic Sensors
  • Ferroelectric and Piezoelectric Materials
  • Semiconductor materials and interfaces
  • Semiconductor materials and devices
  • Graphene research and applications
  • Neural Networks and Reservoir Computing
  • Photonic and Optical Devices
  • Electronic and Structural Properties of Oxides
  • Topological Materials and Phenomena
  • Semiconductor Quantum Structures and Devices
  • Quantum Dots Synthesis And Properties

Universidade Federal de Minas Gerais
2021-2025

Massachusetts Institute of Technology
2007

Layered materials have attracted significant attention in recent years due to the diverse electronic properties arising from different structural variations. Here, we present angle-resolved photoemission spectroscopy measurements conducted on topological material Sb4Te3. This consists of a composite stacking two distinct materials: three-dimensional (3D) insulator Sb2Te3 and two--dimensional (2D) Sb2. Our combined with density functional theory reveal that behavior exhibited by Sb2 persists,...

10.1021/acsaelm.4c00979 article EN cc-by ACS Applied Electronic Materials 2024-07-10

We describe strategies for fabricating strong-confinement microring filters and circuits, assert that techniques specifically tailored to microphotonics requirements provide a more efficient path commercialization than developed semiconductor electronics.

10.1109/ofc.2007.4348654 article EN 2007-03-01

The prediction of semiconductor device performance is a persistent challenge in materials science, and the ability to anticipate useful specifications prior construction crucial for enhancing overall efficiency. In this study, we investigate constituents solar cell by employing scanning tunneling microscopy (STM) spectroscopy (STS). Through our observations, identify spatial distribution dopant type thin films that were designed present major p-doping germanium sulfide (GeS) dominant...

10.1021/acsami.3c11876 article EN ACS Applied Materials & Interfaces 2023-12-20

In this work, we have investigated the structural and electronic properties of Mg-doped GaAs(111) nanowires synthesized through a vapor–liquid–solid growth mechanism. The crystalline structure these was measured using synchrotron X-ray diffraction, while their addressed by scanning tunneling spectroscopy. Scanning microscopy measurements revealed that conducting Ga2Mg/Mg clusters are observed at {110} nanowire lateral surfaces, allowing electrical contacts with reduced Schottky barriers....

10.1021/acsanm.1c03192 article EN ACS Applied Nano Materials 2021-10-19
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