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Note for Physics for Information Science - PIS By shanmugam.s

  • Physics for Information Science - PIS
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Shanmugam S
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SUBJECT CODE: PH 8252 PHYSICS FOR INFORMATION SCIENCE GANESH COLLEGE OF ENGINEERING (Affiliated to Anna University, Chennai) ATTUR MAIN ROAD, METTUPATTI, SALEM – 636 111. Course Material for PHYSICS FOR INFORMATION SCIENCE (Common to courses offered in Faculty of MechanicalEngineering Except B.E. CSE & IT) SUBJECT CODE: PH 8252 Prepared by Mr. S.SHANMUGAM, M.Sc., M.Ed., M.Phil., Assistant Professor DEPARTMENT OF PHYSICS Mail id: shanmugam2100@gmail.com Cell No: +91-9942295728 1

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SUBJECT CODE: PH 8252 PH 8252 PHYSICS FOR INFORMATION SCIENCE PHYSICS FOR INFORMATION SCIENCE (Common to CSE & IT) LTPC 3 0 03 OBJECTIVES:  To understand the essential principles of Physics of semiconductor device and Electron transport properties. Become proficient in magnetic and optical properties of materials and Nano-electronic devices. UNIT I ELECTRICAL PROPERTIES OF MATERIALS 9 Classical free electron theory – Expression for electrical conductivity – Thermal conductivity, expression – Wiedemann-Franz law – Success and failures – electrons in metals – Particle in a three dimensional box – degenerate states – Fermi- Dirac statistics – Density of energy states – Electron in periodic potential – Energy bands in solids – tight binding approximation – Electron effective mass – concept of hole. UNIT II SEMICONDUCTOR PHYSICS 9 Intrinsic Semiconductors – Energy band diagram – direct and indirect band gap semiconductors – Carrier concentration in intrinsic semiconductors – extrinsic semiconductors – Carrier concentration in N-type & P-type semiconductors – Variation of carrier concentration with temperature – variation of Fermi level with temperature and impurity concentration – Carrier transport in Semiconductor: random motion, drift, mobility and diffusion – Hall effect and devices – Ohmic contacts – Schottky diode. UNIT III MAGNETIC PROPERTIES OF MATERIALS 9 Magnetic dipole moment – atomic magnetic moments- magnetic permeability and susceptibility – Magnetic material classification: diamagnetism – paramagnetism – ferromagnetism – antiferromagnetism – ferrimagnetism – Ferromagnetism: origin and exchange interactionsaturation magnetization and Curie temperature – Domain Theory- M versus H behaviour – Hard and soft magnetic materials – examples and uses-– Magnetic principle in computer data storage – Magnetic hard disc (GMR sensor). UNIT IV OPTICAL PROPERTIES OF MATERIALS 9 Classification of optical materials – carrier generation and recombination processes – Absorption emission and scattering of light in metals, insulators and semiconductors (concepts only) – photo current in a P-N diode – solar cell – LED – Organic LED – Laser diodes – Optical data storage techniques. 2

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SUBJECT CODE: PH 8252 PHYSICS FOR INFORMATION SCIENCE UNIT V NANO DEVICES 9 Electron density in bulk material – Size dependence of Fermi energy – Quantum confinement – Quantum structures – Density of states in quantum well, quantum wire and quantum dot structure – Band gap of nanomaterials – Tunneling: single electron phenomena and single electron transistor – Quantum dot laser. Conductivity of metallic nanowires – Ballistic transport – Quantum resistance and conductance – Carbon nanotubes: Properties and applications. TOTAL: OUTCOMES: At the end of the course, the students will able to 45 PERIODS  Gain knowledge on classical and quantum electron theories, and energy band structuues,  Acquire knowledge on basics of semiconductor physics and its applications in various devices,  Get knowledge on magnetic properties of materials and their applications in data storage,  Have the necessary understanding on the functioning of optical materials for optoelectronics,  Understand the basics of quantum structures and their applications in carbon electronics.. TEXTBOOKS: 1.Jasprit Singh, ―Semiconductor Devices: Basic Principles‖, Wiley 2012. 2.Kasap, S.O. ―Principles of Electronic Materials and Devices‖, McGraw-Hill Education, 2007. 3.Kittel, C. ―Introduction to Solid State Physics‖. Wiley, 2005. REFERENCES: 1.Garcia, N. & Damask, A. ―Physics for Computer Science Students‖. Springer-Verlag, 2012. 2.Hanson, G.W. ―Fundamentals of Nanoelectronics‖. Pearson Education, 2009. 3.Rogers, B., Adams, J. &Pennathur, S. ―Nanotechnology: Understanding Small Systems‖. CRC Press, 2014. 3

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SUBJECT CODE: PH 8252 UNIT I PHYSICS FOR INFORMATION SCIENCE ELECTRICAL PROPERTIES OF MATERIALS 1 Introduction 1.1. Basic Terminologies 2 Conducting Materials 3 Electron Theory of solids 4 Classical Free Electron Theory 4.1. Drude – Lorentz Theory 4.2. Postulates of Classical Free Electron Theory 4.3. Derivation of Electrical conductivity 4.4. Thermal Conductivity 5 Wiedemann - Franz Law 6 Lorentz Number 7 Merits of classical free electron theory 8 Drawbacks of classical free electron theory 9 Quantum Free Electron Theory 10 Fermi Dirac Distribution Function 10.1. Effect of Temperature 11 Density of Energy States 11.1. Definition 11.2. Derivation 11.3. Calculation of Carrier Concentration at 0 K 11.4. Calculation of Fermi Energy 11.5. Average Energy of an Electron at 0 K 4

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