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Mattis, Daniel C. | What is the effective mass of an exciton? | In the effective-mass approximation, the mass M* of an exciton is just the sum of the electron and hole masses, me*+ mh*. However, the effective-mass approximation is invalid if the forces are strong. Here we derive a plausible formula for the n th bound state of the exciton: Mn*= (me* + mh*) / (... | Kinetic; Energy; Electron | 1984 |
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