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Browsing by Author Bach, Thanh Cong

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  • 4218-97-8100-1-10-20171016.pdf.jpg
  • Article

  • First-principles calculations on electronic properties of LaNiO3 in solid oxide fuel cell cathodes

    • Authors: Pham, Ba Duy; Nguyen, Duy Huy; Bach, Thanh Cong (2017)

  • First-principles calculations based on the density functional theory are used to study the electronic structure of LaNiO3 perovskite for application of cathode material in solid oxide fuel cell. Our results show that bulk LaNiO3 exhibits metallic behavior. For 1x1x1 LaNiO3 unit cell, increasing in-plane strain leads to the increase in the density of states (DOS) at the Fermi level. On the other hand, the DOS at the Fermi level for 2x2x2 LaNiO3 supercell first increases with the strain up to 3% and then decreases for larger values of the strain. The difference between the electronic structure of the 2x2x2 supercell and that of the 1x1x1 unit cell is attributed to the rotations of NiO6 ...
  • 172.pdf.jpg
  • Article

  • Influence of intradot Coulomb interaction on transport properties of an Aharonov-Bohm interferometer

    • Authors: Do, Ngoc Son; Bach, Thanh Cong (2007)

  • Using Greens function method and the equation of motion approach, we have investigated the electronic transport properties of an Aharonov-Bohm (AB) ring in the presence of a magnetic field with a quantum dot inserted in one arm of the ring. In particular, we consider the electron-electron Coulomb interaction within the quantum dot. We find that the current through the system is dependent on the magnetic flux via the AB phase and the Coulomb interaction within the quantum dot, in agreement with experiments. Furthermore, the intradot Coulomb interaction induces dephasing.
  • 52.pdf.jpg
  • Article

  • Mg-doped TiO2 for dye-sensitive solar cell: An electronic structure study

    • Authors: Tran, Van Nam; Nguyen, Thuy Trang; Bach, Thanh Cong (2012)

  • Recently, there has been a renewed interest in TiO2 anatase as charge transfer layer in dye-sensitized solar cells (DSSC). In this work, the electronic structure of Mg-doped TiO2 anatase was explored in the framework of density functional theory (DFT). The results showed that the substitution of Mg2+ ions for Ti4+ ions was quite easy in comparison with non metalic doping case. It induced small lattice expansions about 0.3% along a and b axis and 0.1% along c axis which can be explained in terms of internal stress around the impurity site and the anisotropic softy of the material. The effects of Mg impurity on the bulk and surface electronic structures were also discussed in details. I...
  • Order-disorder-phase-transitions-in-thin-films-described-by-transverse-Ising-model_2016_Journal-of-Science-Advanced-Materials-and-Devices.pdf.jpg
  • Article

  • Orderedisorder phase transitions in thin films described by transverse Ising model

    • Authors: Nguyen, Tu Niem; Bach, Huong Giang; Bach, Thanh Cong (2016)

  • The order-disorder phase transition in thin films at finite temperature and zero temperature (quantum phase transition) is discussed within the transverse Ising model using molecular field approximation. Experimentally, it is shown that the Curie temperature TC of perovskite PbTiO3 ultra-thin film decreases with decreasing film thickness. We obtain an equation for TC of thin film in external magnetic and transverse fields. Our equation explains well for the case of strong transverse strain field this behaviour.

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Browsing by Author Bach, Thanh Cong

Jump to: 0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
or enter first few letters:  
Showing results 4 to 7 of 7
  • 4218-97-8100-1-10-20171016.pdf.jpg
  • Article

  • First-principles calculations on electronic properties of LaNiO3 in solid oxide fuel cell cathodes

    • Authors: Pham, Ba Duy; Nguyen, Duy Huy; Bach, Thanh Cong (2017)

  • First-principles calculations based on the density functional theory are used to study the electronic structure of LaNiO3 perovskite for application of cathode material in solid oxide fuel cell. Our results show that bulk LaNiO3 exhibits metallic behavior. For 1x1x1 LaNiO3 unit cell, increasing in-plane strain leads to the increase in the density of states (DOS) at the Fermi level. On the other hand, the DOS at the Fermi level for 2x2x2 LaNiO3 supercell first increases with the strain up to 3% and then decreases for larger values of the strain. The difference between the electronic structure of the 2x2x2 supercell and that of the 1x1x1 unit cell is attributed to the rotations of NiO6 ...
  • 172.pdf.jpg
  • Article

  • Influence of intradot Coulomb interaction on transport properties of an Aharonov-Bohm interferometer

    • Authors: Do, Ngoc Son; Bach, Thanh Cong (2007)

  • Using Greens function method and the equation of motion approach, we have investigated the electronic transport properties of an Aharonov-Bohm (AB) ring in the presence of a magnetic field with a quantum dot inserted in one arm of the ring. In particular, we consider the electron-electron Coulomb interaction within the quantum dot. We find that the current through the system is dependent on the magnetic flux via the AB phase and the Coulomb interaction within the quantum dot, in agreement with experiments. Furthermore, the intradot Coulomb interaction induces dephasing.
  • 52.pdf.jpg
  • Article

  • Mg-doped TiO2 for dye-sensitive solar cell: An electronic structure study

    • Authors: Tran, Van Nam; Nguyen, Thuy Trang; Bach, Thanh Cong (2012)

  • Recently, there has been a renewed interest in TiO2 anatase as charge transfer layer in dye-sensitized solar cells (DSSC). In this work, the electronic structure of Mg-doped TiO2 anatase was explored in the framework of density functional theory (DFT). The results showed that the substitution of Mg2+ ions for Ti4+ ions was quite easy in comparison with non metalic doping case. It induced small lattice expansions about 0.3% along a and b axis and 0.1% along c axis which can be explained in terms of internal stress around the impurity site and the anisotropic softy of the material. The effects of Mg impurity on the bulk and surface electronic structures were also discussed in details. I...
  • Order-disorder-phase-transitions-in-thin-films-described-by-transverse-Ising-model_2016_Journal-of-Science-Advanced-Materials-and-Devices.pdf.jpg
  • Article

  • Orderedisorder phase transitions in thin films described by transverse Ising model

    • Authors: Nguyen, Tu Niem; Bach, Huong Giang; Bach, Thanh Cong (2016)

  • The order-disorder phase transition in thin films at finite temperature and zero temperature (quantum phase transition) is discussed within the transverse Ising model using molecular field approximation. Experimentally, it is shown that the Curie temperature TC of perovskite PbTiO3 ultra-thin film decreases with decreasing film thickness. We obtain an equation for TC of thin film in external magnetic and transverse fields. Our equation explains well for the case of strong transverse strain field this behaviour.