Browsing by Keywords "Polarons"

Now showing items 1-5 of 5

    • Electronic structure of conducting organic polymers: insights from time-dependent density functional theory 

      Salzner, U. (John Wiley & Sons Ltd., 2014)
      Conducting organic polymers (COPs) became an active field of research after it was discovered how thin films rather than insoluble infusible powders can be produced. The combination of the properties of plastics with those ...

    • Existence of a metallic phase in a 1D Holstein-Hubbard model at half filling 

      Krishna, P. M.; Chatterjee, A. (Elsevier B.V., 2007)
      The one-dimensional half-filled Holstein-Hubbard model is studied using a series of canonical transformations including phonon coherence effect that partly depends on the electron density and is partly independent and also ...

    • Hartree-Fock approximation of bipolaron state in quantum dots and wires 

      Senger, R. T.; Kozal, B.; Chatterjee, A.; Erçelebi, A. (Springer, 2010)
      The bipolaronic ground state of two electrons in a spherical quantum dot or a quantum wire with parabolic boundaries is studied in the strong electron-phonon coupling regime. We introduce a variational wave function that ...

    • On the stability of Fröhlich bipolarons in spherical quantum dots 

      Senger, R. T.; Erçelebi, A. (Institute of Physics, 2002)
      In the strong-electron-phonon-coupling regime, we retrieve the stability criterion for bipolaron formation in a spherical quantum dot. The model that we use consists of a pair of electrons immersed in a reservoir of bulk ...

    • Polaronic effects in a gaussian quantum dot 

      Yanar, S.; Sevim, A.; Boyacioglu, B.; Saglam, M.; Mukhopadhyaya, S.; Chatterjee, A. (Elsevier, 2008)
      The problem of an electron interacting with longitudinal-optical (LO) phonons is investigated in an N-dimensional quantum dot with symmetric Gaussian confinement in all directions using the Rayleigh-Schrödinger perturbation ...