The book has been designed as a textbook for graduate and postgraduate students of physics, material science, and engineering. This is the third edition of the textbook, that is updated to reflect recent works in the field. In this edition, some new topics have been introduced while some of the existing topics like phonons, Drude -Lorentz model, Fermi levels, electrons, and holes, etc. are modified. Moreover, the book has complete information on semiconductor devices like tunnel diode, Gunn diode, photodiode, photoconductive diode, varactor diode, solar cell, LED, semiconductor lasers, and semiconductor detectors. All the chapters have been supplemented by solved and unsolved examples. Some of the chapters illustrate areas of current interest in solid-state physics to give the student practical working knowledge of the subject text in a simple and lucid manner. There is a fair amount of detail in the examples and derivations given in the text. Each section of the book has exercises to reinforce the concepts, and problems have been added at the end of each chapter. The detailed coverage and pedagogical tools make this an ideal textbook for students and researchers enrolled in graduate and postgraduate courses of physics, material science, and engineering.

�ber die Autorin bzw. den Autor

Dr. Vimal Kumar Jain, Alexander von Humboldt Fellow, received his Ph.D. from Indian Institute of Technology Kanpur in 1977. He is a former Professor and Head of Physics Department at Maharshi Dayanand University, Rohtak. He was also a Professor of Applied Science in P.D.M.College of Engineering, Bahadurgarh, Professor and Head of ECE Department, Vidya College of Engineering, Meerut and Professor of Physics, IIMT Engineering College Meerut. Dr. Jain was also a Visiting Professor at Instituto de Fisica, Universidad Federal do Rio de Janeiro, Brazil. He has been working in the field of Electron Paramagnetic Resonance and published four review articles and more than hundred research papers in National and International Journals. Dr. Jain has supervised the research work of several M.Phil. and Ph.D. students and worked on various sponsored research projects. He has also authored books on Atomic and Molecular Spectroscopy, Classical Mechanics and Quantum Mechanics.

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