Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 6 of 6 for “"Dielectric screening"”.
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Improvement of the dielectric screening model in the Bethe-Salpeter equation approach: From static screening approximation to dynamical screening model
The student, Xiao Zhang, accepted the attached license on 2019-11-14 at 15:16.
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Screening and the effective fine structure constant in graphene
… – the effective fine-structure constant of and dielectric screening in graphene, and a new coherent inelastic x-ray scattering technique for attosecond resolution imaging of excitations in crystalline materials. The strength of electron-electron interactions in graphene is expected to be large …
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Atomic-Scale Design at the 2D/3D Interface using Electron Microscopy
… peak related to the 2D/3D interface via dielectric screening by the 3D contact. We discuss how such understanding of the structure-property-performance relationship allows versatile design of low-dimensional heterostructures for next generation nanoscale devices. Finally, we extend beyond …
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Single and multi-exciton dynamics in nanoscale semiconductors
… biexciton binding energies due to reduced dielectric screening in the atomically thin limit. The exciton and phonon dynamics revealed in these experiments contribute to our understanding of the elementary excitations in organic and inorganic nanostructured semiconductors. It is our hope …
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First principles quantum Monte Carlo study of correlated electronic systems
… random phase approximation predicts no metallic screening at long distances and low energies because of the zero density of states at Fermi level. It is thus interesting to see how screening takes place in graphene at different length scales. We addressed this problem by computing the structure …
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Charge and energy transport in 0D/2D systems probed using linear and nonlinear spectroscopy
… we find that this behavior arises from screening interactions between trapped and mobile exciton pairs. We measure the effective exciton diffusion coefficient in superacid-treated MoS₂ to be D = 0.06 ± 0.01 cm²/s, corresponding to a diffusion length of LD = 350 nm for an exciton lifetime …