Описание: The contemporary enthusiasm for environmentally friendly energy sources - such as solar, geothermal, and wind energy - has caused a surge of interest into how thermoelectrics might contribute to greater efficiency in energy generation and conversion.
Автор: Palyi, Andras Asboth, Janos K. Oroszlany, Laszlo Название: Short course on topological insulators ISBN: 331925605X ISBN-13(EAN): 9783319256054 Издательство: Springer Рейтинг: Цена: 4890.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: This course-based primer provides newcomers to the field with a concise introduction to some of the core topics in the emerging field of topological insulators. The aim is to provide a basic understanding of edge states, bulk topological invariants, and of the bulk--boundary correspondence with as simple mathematical tools as possible.
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.
Описание: At the Material Research Society Spring 2013 meeting, held in San Francisco April 1-5, 2013, three symposia were held focusing on thermal-to-electric energy conversion and thermal transport: Symposium H: Nanoscale Thermoelectrics - Materials and Transport Phenomena - II, Symposium I: Materials for Solid-State Refrigeration, and Symposium V: Nanoscale Heat Transport - From Fundamentals to Devices.
Автор: Veljko Zlatic; Alexander Hewson Название: Properties and Applications of Thermoelectric Materials ISBN: 9048128919 ISBN-13(EAN): 9789048128914 Издательство: Springer Рейтинг: Цена: 21661.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: Explores the effects of strong electron correlation, disorder, the proximity to metal-insulator transitions, the properties of layered composite materials, and the introduction of voids or cages into the structure to reduce the lattice thermal conductivity.
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