Sökning: "Biplab Sanyal"

Visar resultat 6 - 10 av 19 avhandlingar innehållade orden Biplab Sanyal.

  1. 6. Density Functional Theory Calculations of Graphene based Humidity and Carbon Dioxide Sensors

    Författare :Karim Elgammal; Anna Delin; Biplab Sanyal; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; DFT; graphene; sensors; Quantum Espresso; ab-initio; Fysik; Physics;

    Sammanfattning : Graphene has many interesting physical properties which makes it useful for plenty of applications. In this work we investigate the possibility of using graphene as a carbon dioxide and humidity sensor. LÄS MER

  3. 7. Dynamics of excited electronic states in functional materials

    Författare :Raquel Esteban-Puyuelo; Biplab Sanyal; Oscar Grånas; Patrik Rinke; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Non-equilibrium processes involving excited electron states are very common in nature. This work summarizes some of the theoretical developments available to study them in finite and ex-tended systems. LÄS MER

  4. 8. Theoretical Studies of Magnetism and Electron Correlation in Solids

    Författare :Oscar Grånäs; Lars Nordström; Biplab Sanyal; Silke Biermann; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Magnetism; Superconductivity; Electron Correlation; DMFT; DFT; Actinides; multipoles; hidden order; magnetic anisotropy; Physics with spec. in Atomic; Molecular and Condensed Matter Physics; Fysik med inriktning mot atom- molekyl- och kondenserande materiens fysik;

    Sammanfattning : This work presents new development and applications of ab-initio simulation tools for material science. Focus lies on materials with strong electronic correlation and strong spin-orbit coupling. LÄS MER

  5. 9. Computational studies on 2D and 3D amorphous solids : Investigation of structure-property relationship

    Författare :Emel Gürbüz; Biplab Sanyal; Andreas Larsson; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Amorphous solids; Metallic glasses; Classical molecular dynamics simulations; Thermal transport; Density functional theory; 2D glasses; Vibrational properties; Magnetism; Optical properties;

    Sammanfattning : Amorphous materials represent a large and diverse family, with many questions still remaining unanswered regarding their structure-property relationship. The structural complexity of these materials poses challenges for simulations in contrast to crystalline materials where density func­tional theory (DFT) can be used easily by exploiting the translation symmetry. LÄS MER

  7. 10. Influence of defects and impurities on the properties of 2D materials

    Författare :Soumyajyoti Haldar; Biplab Sanyal; Olle Eriksson; Torbjörn Björkman; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; 2D Materials; Defects on 2D materials; Impurities on 2D materials; Physics with spec. in Atomic; Molecular and Condensed Matter Physics; Fysik med inriktning mot atom- molekyl- och kondenserande materiens fysik;

    Sammanfattning : Graphene, the thinnest material with a stable 2D structure, is a potential alternative for silicon-based electronics. However, zero band gap of graphene causes a poor on-off ratio of current thus making it unsuitable for logic operations. This problem prompted scientists to find other suitable 2D materials. LÄS MER