Browsing by Keywords "Phonons"
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Mobility limiting scattering mechanisms in nitridebased twodimensional heterostructures with the InGaN channel
(IOP Publishing, 20100316)The scattering mechanisms limiting the carrier mobility in AlInN/AlN/InGaN/GaN twodimensional electron gas (2DEG) heterostructures were investigated and compared with devices without InGaN channel. Although it is expected ... 
A new method of probing the phonon mechanism in superconductors, including MgB2
(2001)Weak localization has a strong influence on both the normal and superconducting properties of metals. In particular, since weak localization leads to the decoupling of electrons and phonons, the temperature dependence of ... 
Nonlinear thermoelectricity and cooling effects in metallic constrictions
(Institute of Physics Publishing Ltd., 1994)Linear as well as nonlinear contributions to the Zeebeck and Peltier coefficients of a metallic film in contact with the equilibrium metal are calculated within a simple model. The nonlinear part of the thermoelectric ... 
On the stability of Fröhlich bipolarons in spherical quantum dots
(Institute of Physics, 2002)In the strongelectronphononcoupling 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 ... 
Phonon confinement and screening effects on the polaron energy in quantum wires
(Institute of Physics Publishing Ltd., 1995)We study the contribution of confined phonons to the polaron energy in quantumwell wires. We use a dispersionless, macroscopic continuum model to describe the phonon confinement in quantum wires of square cross section. ... 
Phonon squeezing in superconducting borocarbides
(Elsevier BV * NorthHolland, 1994)The recently discovered superconductor LuNi2B2C is investigated in the context of strong electronelectron correlations modulated by a squeezed phonon mode propagating in the perpendicular direction to the layers with ... 
Phononassisted exciton transfer into silicon using nanoemitters: the role of phonons and temperature effects in förster resonance energy transfer
(American Chemical Society, 2013)We study phononassisted Forster resonance energy transfer (FRET) into an indirect bandgap semiconductor using nanoemitters. The unusual temperature dependence of this energy transfer, which is measured using the donor ... 
Phononassisted nonradiative energy transfer from colloidal quantum dots to monocrystalline bulk silicon
(IEEE, 2012)Silicon is one of the most dominant materials in photovoltaics. To increase optical absorption of silicon solar cells, colloidal quantum dots (QDs) have been proposed as a good sensitizer candidate owing to their favorably ... 
Polaronic effects in a gaussian quantum dot
(Elsevier, 2008)The problem of an electron interacting with longitudinaloptical (LO) phonons is investigated in an Ndimensional quantum dot with symmetric Gaussian confinement in all directions using the RayleighSchrödinger perturbation ... 
Quantum mechanical simulation of charge transport in very small semiconductor structures
(IEEE, 1989)A quantum mechanical simulation method of charge transport in very small semiconductor devices, based on the numerical solution of the timedependent Schrödinger equation (coupled selfconsistently to the Poisson equation ... 
Quantum size effect on the phononinduced Zeeman splitting in a GaAs quantum dot with Gaussian and parabolic confining potentials
(Elsevier B.V., 2008)The Zeeman splitting of the ground and the first excited level of a Gaussian GaAs quantum dot is studied in the presence of electronlongitudinaloptical (LO)phonon interaction incorporating the spin of the electron and ... 
Raman scattering from confined phonons in GaAs/AlGaAs quantum wires
(Academic Press, 1998)We report on photoluminescence and Raman scattering performed at low temperature (T = 10 K) on GaAs/Al 0.3Ga 0.7As quantumwell wires with effective wire widths of L = 100.0 and 10.9 nm prepared by molecular beam epitaxial ... 
Scattering analysis of twodimensional electrons in AlGaN/GaN with bulk related parameters extracted by simple parallel conduction extraction method
(American Institute of Physics, 20100715)We carried out the temperature (22350 K) and magnetic field (0.05 and 1.4 T) dependent Hall mobility and carrier density measurements on Al 0.22Ga0.78N/GaN heterostructures with AlN interlayer grown by metalorganic ... 
Silicon nanoparticle charge trapping memory cell
(WileyVCH Verlag, 2014)A charge trapping memory with 2 nm silicon nanoparticles (Si NPs) is demonstrated. A zinc oxide (ZnO) active layer is deposited by atomic layer deposition (ALD), preceded by Al2O3 which acts as the gate, blocking and ... 
Slowing surface plasmon polaritons on plasmonic coupled cavities by tuning grating grooves
(American Institute of Physics, 201009)We investigate slow surface plasmon polaritons (SPPs) in plasmonic waveguiding bands formed by coupled plasmonic cavities on Moiŕ surfaces. We demonstrate controlling the group velocity and dispersion of the SPPs by varying ... 
Stability of two dimensional (2D) structures based on GaAs
(Bilkent University, 201508)Graphene is a two dimensional material isolated for the first time in 2004. After this, two dimensional materials has become an appealing research area for the scientists because of their exotic properties. In search ... 
The static and dynamic screening of power loss of a twodimensional electron gas
(Academic Press, 1998)Experimental results concerning the wellwidth dependence of the acousticphononassisted energy relaxation of a twodimensional electron gas in GaAs/Ga1xAlxAs quantumwell structures are compared with theoretical models ... 
Strong coupling between localized and propagating plasmon polaritons
(OSA  The Optical Society, 2015)We investigate plasmonplasmon (PP) coupling in the strongly interacting regimes by using a tunable plasmonic platform consisting of triangular Ag nanoprisms placed nanometers away from Ag thin films. The nanoprisms are ... 
Strong coupling characterisation of quasi1D polarons in cylindrical QWwires
(Pergamon Press, 1996)We retrieve, within the strongcoupling theory, the quasione dimensional analog of the standard optical polaron relevant to a cylindrical quantum well wire. Under the assumption of perfect confinement the ground state ... 
SU(2)path integral investigation of Holstein dimer
(Elsevier Science Publishers B.V., Amsterdam, Netherlands, 2000)The SU(2) coherent state path integral is used to investigate the partition function of the Holstein dimer. This approach naturally takes into account the symmetry of the model. The groundstate energy and the number of ...