Fermi Level Pinning Charge Transfer And Relaxation Of Spin Momentum Locking At Metal Contacts To Topological Insulators
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Author | : |
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Total Pages | : |
Release | : 2014 |
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Topological insulators are of interest for many applications in electronics and optoelectronics, but harnessing their unique properties requires detailed understanding and control of charge injection at electrical contacts. Here we present large-scale ab initio calculations of the electronic properties of Au, Ni, Pt, Pd, and graphene contacts to Bi2Se3. We show that regardless of the metal, the Fermi level is located in the conduction band, leading to n-type Ohmic contact to the first quintuplet. Furthermore, we find strong charge transfer and band-bending in the first few quintuplets, with no Schottky barrier for charge injection even when the topoplogical insulator is undoped. Our calculations indicate that Au and graphene leave the spin-momentum locking mostly unaltered, but on the other hand, Ni, Pd, and Pt strongly hybridize with Bi2Se3 and relax spin-momentum locking. In conclusion, our results indicate that judicious choice of the contact metal is essential to reveal the unique surface features of topological insulators.
Author | : Vitalii K Dugaev |
Publisher | : CRC Press |
Total Pages | : 397 |
Release | : 2021-11-15 |
Genre | : Science |
ISBN | : 1000462293 |
This textbook provides a theoretical background for contemporary trends in solid-state theory and semiconductor device physics. It discusses advanced methods of quantum mechanics and field theory and is therefore primarily intended for graduate students in theoretical and experimental physics who have already studied electrodynamics, statistical physics, and quantum mechanics. It also relates solid-state physics fundamentals to semiconductor device applications and includes auxiliary results from mathematics and quantum mechanics, making the book useful also for graduate students in electrical engineering and material science. Key Features: Explores concepts common in textbooks on semiconductors, in addition to topics not included in similar books currently available on the market, such as the topology of Hilbert space in crystals Contains the latest research and developments in the field Written in an accessible yet rigorous manner
Author | : Ari M. Turner |
Publisher | : Elsevier Inc. Chapters |
Total Pages | : 42 |
Release | : 2013-11-23 |
Genre | : Science |
ISBN | : 0128086920 |
Author | : 陳亮瑜 |
Publisher | : |
Total Pages | : 104 |
Release | : 2018 |
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Author | : Arthur P. Cracknell |
Publisher | : Oxford University Press, USA |
Total Pages | : 588 |
Release | : 1973 |
Genre | : Science |
ISBN | : |
Author | : L. J. Brillson |
Publisher | : |
Total Pages | : 6 |
Release | : 1982 |
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Author | : Yongbing Xu |
Publisher | : Springer |
Total Pages | : 0 |
Release | : 2015-10-14 |
Genre | : Science |
ISBN | : 9789400768918 |
Over two volumes and 1500 pages, the Handbook of Spintronics will cover all aspects of spintronics science and technology, including fundamental physics, materials properties and processing, established and emerging device technology and applications. Comprising 60 chapters from a large international team of leading researchers across academia and industry, the Handbook provides readers with an up-to-date and comprehensive review of this dynamic field of research. The opening chapters focus on the fundamental physical principles of spintronics in metals and semiconductors, including an introduction to spin quantum computing. Materials systems are then considered, with sections on metallic thin films and multilayers, magnetic tunnelling structures, hybrids, magnetic semiconductors and molecular spintronic materials. A separate section reviews the various characterisation methods appropriate to spintronics materials, including STM, spin-polarised photoemission, x-ray diffraction techniques and spin-polarised SEM. The third part of the Handbook contains chapters on the state of the art in device technology and applications, including spin valves, GMR and MTJ devices, MRAM technology, spin transistors and spin logic devices, spin torque devices, spin pumping and spin dynamics and other topics such as spin caloritronics. Each chapter considers the challenges faced by researchers in that area and contains some indications of the direction that future work in the field is likely to take. This reference work will be an essential and long-standing resource for the spintronics community.
Author | : Eric Akkermans |
Publisher | : Cambridge University Press |
Total Pages | : 479 |
Release | : 2007-05-28 |
Genre | : Science |
ISBN | : 1139463993 |
Quantum mesoscopic physics covers a whole class in interference effects related to the propagation of waves in complex and random media. These effects are ubiquitous in physics, from the behaviour of electrons in metals and semiconductors to the propagation of electromagnetic waves in suspensions such as colloids, and quantum systems like cold atomic gases. A solid introduction to quantum mesoscopic physics, this book is a modern account of the problem of coherent wave propagation in random media. It provides a unified account of the basic theoretical tools and methods, highlighting the common aspects of the various optical and electronic phenomena involved and presenting a large number of experimental results. With over 200 figures, and exercises throughout, the book was originally published in 2007 and is ideal for graduate students in physics, electrical engineering, applied physics, acoustics and astrophysics. It will also be an interesting reference for researchers.
Author | : Sadamichi Maekawa |
Publisher | : Oxford University Press |
Total Pages | : 541 |
Release | : 2017 |
Genre | : Science |
ISBN | : 0198787073 |
In a new branch of physics and technology, called spin-electronics or spintronics, the flow of electrical charge (usual current) as well as the flow of electron spin, the so-called "spin current", are manipulated and controlled together. This book is intended to provide an introduction and guide to the new physics and applications of spin current.
Author | : Alexander Altland |
Publisher | : Cambridge University Press |
Total Pages | : 785 |
Release | : 2010-03-11 |
Genre | : Science |
ISBN | : 0521769752 |
This primer is aimed at elevating graduate students of condensed matter theory to a level where they can engage in independent research. Topics covered include second quantisation, path and functional field integration, mean-field theory and collective phenomena.