Tuning Thermoelectricity in a Bi2Se3 Topological Insulator Via Varied Film Thickness PDF Download
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Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
We report thermoelectric transport studies on Bi2Se3 topological insulator thin films with varied thickness grown by molecular beam epitaxy. We find that the Seebeck coefficient and thermoelectric power factor decrease systematically with the reduction of film thickness. These experimental observations can be explained quantitatively by theoretical calculations based on realistic electronic band structure of the Bi2Se3 thin films. Lastly, this work illustrates the crucial role played by the topological surface states on the thermoelectric transport of topological insulators, and sheds new light on further improvement of their thermoelectric performance.
Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
We report thermoelectric transport studies on Bi2Se3 topological insulator thin films with varied thickness grown by molecular beam epitaxy. We find that the Seebeck coefficient and thermoelectric power factor decrease systematically with the reduction of film thickness. These experimental observations can be explained quantitatively by theoretical calculations based on realistic electronic band structure of the Bi2Se3 thin films. Lastly, this work illustrates the crucial role played by the topological surface states on the thermoelectric transport of topological insulators, and sheds new light on further improvement of their thermoelectric performance.
Author: Zishan H. Khan Publisher: Springer Nature ISBN: 9811905533 Category : Technology & Engineering Languages : en Pages : 608
Book Description
This book covers the latest research on applications of nanomaterials in the field of energy systems and devices. It provides an overview of the state-of-art research in this rapidly developing field. It discusses the design and fabrication of nanostructured materials and their energy applications. Various topics covered include nanomaterials for perovskite solar cells, transition metal dichalcogenides (TMDs) nanocomposites based supercapacitors, battery materials and technologies, major challenges toward development of efficient thermoelectric materials for energy efficient devices, extraction and experimentation of biodiesel produced from leachate oils of landfills coupled with nano-additives aluminium oxide and copper oxide on diesel engine and many more. It has contributions from world-renowned specialists in the fields of nanomaterials and energy devices. The book will be useful for students, researchers and professionals working in the area of nanomaterials and energy systems & devices.
Author: Jiajun Zhu Publisher: diplom.de ISBN: 3960676603 Category : Science Languages : en Pages : 88
Book Description
Topological insulator is one of the hottest research topics in solid state physics. This is the first book to describe the vibrational spectroscopies and electrical transport of topological insulator Bi2Se3, one of the most exciting areas of research in condensed matter physics. In particular, attempts have been made to summarize and develop the various theories and new experimental techniques developed over years from the studies of Raman scattering, infrared spectroscopy and electrical transport of topological insulator Bi2Se3. It is intended for material and physics researchers and graduate students doing research in the field of optical and electrical properties of topological insulators, providing them the physical understanding and mathematical tools needed to engage research in this quickly growing field. Some key topics in the emerging field of topological insulators are introduced.
Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
Abstract : We develop a tractable theoretical model to investigate the thermoelectric (TE) transport properties of surface states in topological insulator thin films (TITFs) of Bi2 Se3 at room temperature. The hybridization between top and bottom surface states in the TITF plays a significant role. With the increasing hybridization-induced surface gap, the electrical conductivity and electron thermal conductivity decrease while the Seebeck coefficient increases. This is due to the metal-semiconductor transition induced by the surface-state hybridization. Based on these TE transport coefficients, the TE figure-of-merit ZT is evaluated. It is shown that ZT can be greatly improved by the surface-state hybridization. Our theoretical results are pertinent to the exploration of the TE transport properties of surface states in TITFs and to the potential application of Bi2 Se3 -based TITFs as high-performance TE materials and devices.
Author: Mark S Lundstrom Publisher: World Scientific Publishing Company ISBN: 9814452246 Category : Science Languages : en Pages : 250
Book Description
These lectures are designed to introduce students to the fundamentals of carrier transport in nano-devices using a novel, “bottom up approach” that agrees with traditional methods when devices are large, but which also works for nano-devices. The goal is to help students learn how to think about carrier transport at the nanoscale and also how the bottom up approach provides a new perspective to traditional concepts like mobility and drift-diffusion equations. The lectures are designed for engineers and scientists and others who need a working knowledge of near-equilibrium (“low-field” or “linear”) transport. Applications of the theory and measurement considerations are also addressed. The lectures serve as a starting point to an extensive set of instructional materials available online.
Author: Huixia Luo Publisher: John Wiley & Sons ISBN: 111940732X Category : Technology & Engineering Languages : en Pages : 420
Book Description
This book is the first pedagogical synthesis of the field of topological insulators and superconductors, one of the most exciting areas of research in condensed matter physics. Presenting the latest developments, while providing all the calculations necessary for a self-contained and complete description of the discipline, it is ideal for researchers and graduate students preparing to work in this area, and it will be an essential reference both within and outside the classroom. The book begins with the fundamental description on the topological phases of matter such as one, two- and three-dimensional topological insulators, and methods and tools for topological material's investigations, topological insulators for advanced optoelectronic devices, topological superconductors, saturable absorber and in plasmonic devices. Advanced Topological Insulators provides researchers and graduate students with the physical understanding and mathematical tools needed to embark on research in this rapidly evolving field.
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Author: Zishan H. Khan
Author: Jiajun Zhu
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Author: Christian Ikechukwu Nweze
Author: 華晨瑋
Author: Sercan Babakiray
Author: 董弈
Author: Mark S Lundstrom
Author: Huixia Luo