KNOX THEORY OF EXCITONS PDF

Kagara Energy band structure of selenium chains. The sun is the climate pacemaker. Knox and Bryan Q. Helfer, and Robert S. Line shape of absorption in crystalline theort gases. A 54 Weale, Elsevier, Amsterdam,pp.

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When particle interactions are considered, a large number of bound electron-hole states are found within the gap. These states, called excitons, play a large role in determining the optical properties of nonmetals. We discuss the electronic structure of excitons, their interactions with phonons and photons, and their further role of transporting excitation energy.

This process is experimental and the keywords may be updated as the learning algorithm improves. This is a preview of subscription content, log in to check access. Preview Unable to display preview. Download preview PDF. References 1. Seitz and D. Turnbull, Academic Press, N. Google Scholar 2. Frenkel, Phys. Knox, J. Solids 9, , Davidovich, Phys. Solidi b 98, Slater and W. Shockley, Phys. Wannier, Phys. Mott, Trans.

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INTRODUCTION TO OPTIMAL DESIGN BY JASBIR ARORA PDF

Theory of excitons

Part of the Physics of Solids and Liquids book series PSLI Abstract In crystals of insulators and semiconductors, when an incident photon is absorbed exciting an electron from the valence to the conduction band, a positive charged vacancy, called a hole, is created in the valence band. The attractive Coulomb interaction between the excited electron and the hole thus created binds them together to form a bound neutral compound system of the two charge carriers such as a hydrogen atom. Such a bound system of a pair of charge carriers is called an exciton. An exciton carries a crystal pseudomomentum equivalent to the vector sum of the individual momenta of the electron and the hole and their relative momentum. While the pseudomomentum enables an exciton to move throughout a crystal, the relative momentum determines its internal structure. Because of the attractive Coulomb interaction between the electron and the hole in an exciton, the internal exciton states are analogous to those of a hydrogen atom, and some of the lower energy states lie below the conduction band by an energy equivalent to the exciton binding energy in that state. This process is experimental and the keywords may be updated as the learning algorithm improves.

3TF47 SIEMENS PDF

Introduction to Exciton Physics

When particle interactions are considered, a large number of bound electron-hole states are found within the gap. These states, called excitons, play a large role in determining the optical properties of nonmetals. We discuss the electronic structure of excitons, their interactions with phonons and photons, and their further role of transporting excitation energy. This process is experimental and the keywords may be updated as the learning algorithm improves.

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