D-Index & Metrics Best Publications

D-Index & Metrics D-index (Discipline H-index) only includes papers and citation values for an examined discipline in contrast to General H-index which accounts for publications across all disciplines.

Discipline name D-index D-index (Discipline H-index) only includes papers and citation values for an examined discipline in contrast to General H-index which accounts for publications across all disciplines. Citations Publications World Ranking National Ranking
Materials Science D-index 56 Citations 15,196 227 World Ranking 5268 National Ranking 299

Overview

What is he best known for?

The fields of study he is best known for:

  • Quantum mechanics
  • Electron
  • Oxygen

His main research concerns Crystallography, Condensed matter physics, Electronic structure, Crystal structure and Vacancy defect. Fumiyasu Oba interconnects Cluster expansion, Spinel, Electronic band structure and Lattice in the investigation of issues within Crystallography. His research in Condensed matter physics intersects with topics in Tetragonal crystal system and Octahedron.

His study in Electronic structure is interdisciplinary in nature, drawing from both Chemical physics, Acceptor, Nanotechnology, Crystallographic defect and Tin. His Crystal structure study incorporates themes from Reciprocal lattice, Brillouin zone, Band diagram, Homogeneous space and Wave vector. Fumiyasu Oba works mostly in the field of Phonon, limiting it down to topics relating to Orthorhombic crystal system and, in certain cases, Space group, Polymorphism, Helmholtz free energy and Enthalpy.

His most cited work include:

  • First-principles calculations of the ferroelastic transition between rutile-type and CaCl2-type SiO2 at high pressures (2921 citations)
  • Defect energetics in ZnO: A hybrid Hartree-Fock density functional study (1437 citations)
  • Energetics of native defects in ZnO (309 citations)

What are the main themes of his work throughout his whole career to date?

Fumiyasu Oba mostly deals with Condensed matter physics, Crystallography, Band gap, Electronic structure and Semiconductor. His Condensed matter physics research incorporates themes from Octahedron and Grain boundary. The study incorporates disciplines such as Valence, Transmission electron microscopy and Spinel in addition to Crystallography.

His studies in Band gap integrate themes in fields like Molecular physics and Hybrid functional. His Electronic structure research incorporates elements of Chemical physics, Impurity, Doping and Vacancy defect. Physical chemistry is closely connected to Density functional theory in his research, which is encompassed under the umbrella topic of Semiconductor.

He most often published in these fields:

  • Condensed matter physics (34.64%)
  • Crystallography (34.64%)
  • Band gap (17.50%)

What were the highlights of his more recent work (between 2018-2021)?

  • Condensed matter physics (34.64%)
  • Band gap (17.50%)
  • Crystallography (34.64%)

In recent papers he was focusing on the following fields of study:

The scientist’s investigation covers issues in Condensed matter physics, Band gap, Crystallography, Optoelectronics and Hybrid functional. Particularly relevant to Phase transition is his body of work in Condensed matter physics. He works mostly in the field of Crystallography, limiting it down to concerns involving Valence and, occasionally, Crystal structure.

His Optoelectronics research includes elements of Layer, Light energy, Zinc and Nitrogen. His work deals with themes such as Acceptor, Delocalized electron, Impurity, Electron number and Valence band, which intersect with Hybrid functional. The various areas that he examines in his Electron study include Crystallographic defect, Electronic structure, Molecular physics and Vacancy defect.

Between 2018 and 2021, his most popular works were:

  • Effect of MnO2 Crystal Structure on Aerobic Oxidation of 5-Hydroxymethylfurfural to 2,5-Furandicarboxylic Acid. (92 citations)
  • First-principles study of self-trapped holes and acceptor impurities in Ga 2 O 3 polymorphs (27 citations)
  • First-principles study of self-trapped holes and acceptor impurities in Ga 2 O 3 polymorphs (27 citations)

In his most recent research, the most cited papers focused on:

  • Quantum mechanics
  • Electron
  • Oxygen

His primary areas of study are Crystallography, Corundum, Molecular physics, Doping and Electron. His Crystallography research is multidisciplinary, relying on both Valence, Bixbyite, Phase and Ionization energy. His work carried out in the field of Corundum brings together such families of science as Oxide, Lattice and Crystal structure.

His Doping study combines topics from a wide range of disciplines, such as Hybrid functional and Band gap. His Electron research integrates issues from Electronic structure and Vacancy defect. His work carried out in the field of Vacancy defect brings together such families of science as Crystallographic defect, Charge and Thermal conduction.

This overview was generated by a machine learning system which analysed the scientist’s body of work. If you have any feedback, you can contact us here.

Best Publications

First-principles calculations of the ferroelastic transition between rutile-type and CaCl2-type SiO2 at high pressures

Atsushi Togo;Fumiyasu Oba;Isao Tanaka.
Physical Review B (2008)

4452 Citations

Defect energetics in ZnO: A hybrid Hartree-Fock density functional study

Fumiyasu Oba;Atsushi Togo;Isao Tanaka;Joachim Paier.
Physical Review B (2008)

1499 Citations

Energetics of native defects in ZnO

Fumiyasu Oba;Shigeto R. Nishitani;Seiji Isotani;Hirohiko Adachi.
Journal of Applied Physics (2001)

492 Citations

Band structure diagram paths based on crystallography

Yoyo Hinuma;Yoyo Hinuma;Giovanni Pizzi;Yu Kumagai;Fumiyasu Oba;Fumiyasu Oba.
Computational Materials Science (2017)

365 Citations

Point defects in ZnO: an approach from first principles

Fumiyasu Oba;Minseok Choi;Atsushi Togo;Isao Tanaka.
Science and Technology of Advanced Materials (2011)

340 Citations

Electrostatics-based finite-size corrections for first-principles point defect calculations

Yu Kumagai;Fumiyasu Oba;Fumiyasu Oba.
Physical Review B (2014)

328 Citations

First-principles calculations of native defects in tin monoxide

A. Togo;F. Oba;I. Tanaka;K. Tatsumi.
Physical Review B (2006)

299 Citations

Structures and energetics of Ga2O3 polymorphs

S Yoshioka;H Hayashi;A Kuwabara;F Oba.
Journal of Physics: Condensed Matter (2007)

286 Citations

Band alignment of semiconductors from density-functional theory and many-body perturbation theory

Yoyo Hinuma;Andreas Grüneis;Georg Kresse;Fumiyasu Oba;Fumiyasu Oba.
Physical Review B (2014)

257 Citations

Debye temperature and stiffness of carbon and boron nitride polymorphs from first principles calculations

Tetsuya Tohei;Akihide Kuwabara;Fumiyasu Oba;Isao Tanaka.
Physical Review B (2006)

255 Citations

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