Length-scale dependent phonon interactions /, Shinde, Subhash L.

Автор: Howard
Название: Measuring, Interpreting and Translating Electron Quasiparticle - Phonon Interactions on the Surfaces of the Topological Insulators Bismuth Selenide and Bismuth Telluride
ISBN: 331944722X ISBN-13(EAN): 9783319447223
Издательство: Springer
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Цена: 15672.00 р.
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Описание: The thesis presents experimental and theoretical results about the surface dynamics and the surface Dirac fermion (DF) spectral function of the strong topological insulators Bi2Te3 and Bi2Se3. The experimental results reveal the presence of a strong Kohn anomaly in the measured surface phonon dispersion of a low-lying optical mode, and the absence of surface Rayleigh acoustic phonons. Fitting the experimental data to theoretical models employing phonon Matsubara functions allowed the extraction of the matrix elements of the coupling Hamiltonian and the modifications to the surface phonon propagator that are encoded in the phonon self-energy. This allowed, for the first time, calculation of phonon mode-specific DF coupling ??(q) from experimental data, with average coupling significantly higher than typical values for metals, underscoring the strong coupling between optical surface phonons and surface DFs in topological insulators. Finally, to connect to experimental results obtained from photoemission spectroscopies, an electronic (DF) Matsubara function was constructed using the determined electron-phonon matrix elements and the optical phonon dispersion. This allowed calculation of the DF spectral function and density of states, allowing for comparison with photoemission and scanning tunneling spectroscopies. The results set the necessary energy resolution and extraction methodology for calculating ? from the DF perspective.

Автор: Ridley Brian K.
Название: Hybrid Phonons in Nanostructures
ISBN: 0198788363 ISBN-13(EAN): 9780198788362
Издательство: Oxford Academ
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Цена: 8870.00 р.
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Описание: The book provides a technical account of the basic physics of those nanostructures that are the foundation of the hardware of all manner of computers. It will be read by semiconductor physicists and electronic engineers and advanced research students world-wide.

Автор: Ridley
Название: Electrons and Phonons in Semiconductor Multilayers
ISBN: 1107424577 ISBN-13(EAN): 9781107424579
Издательство: Cambridge Academ
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Цена: 8237.00 р.
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Описание: With new chapters on spin relaxation, the hexagonal wurtzite lattice, nitride structures, and terahertz sources, this second edition will interest graduate students and researchers in semiconductor physics. It is unique in describing the microscopic theory of optical phonons, their change in nature due to confinement, and their interaction with electrons.