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Measuring, Interpreting and Translating Electron Quasiparticle - Phonon Interactions on the Surfaces of the Topological Insulators Bismuth Selenide and Bismuth Telluride (Hardcover, 1st ed. 2016) Loot Price: R2,873
Discovery Miles 28 730
Measuring, Interpreting and Translating Electron Quasiparticle - Phonon Interactions on the Surfaces of the Topological...

Measuring, Interpreting and Translating Electron Quasiparticle - Phonon Interactions on the Surfaces of the Topological Insulators Bismuth Selenide and Bismuth Telluride (Hardcover, 1st ed. 2016)

Colin Howard

Series: Springer Theses

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Loot Price R2,873 Discovery Miles 28 730 | Repayment Terms: R269 pm x 12*

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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.

General

Imprint: Springer International Publishing AG
Country of origin: Switzerland
Series: Springer Theses
Release date: October 2016
First published: 2016
Authors: Colin Howard
Dimensions: 235 x 155 x 8mm (L x W x T)
Format: Hardcover
Pages: 88
Edition: 1st ed. 2016
ISBN-13: 978-3-319-44722-3
Categories: Books > Science & Mathematics > Physics > States of matter > Condensed matter physics (liquids & solids)
Books > Professional & Technical > Mechanical engineering & materials > Materials science > General
Books > Professional & Technical > Electronics & communications engineering > Electronics engineering > Applied optics > Laser technology
Books > Science & Mathematics > Chemistry > Analytical chemistry > Qualitative analytical chemistry > Chemical spectroscopy, spectrochemistry > General
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LSN: 3-319-44722-X
Barcode: 9783319447223

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