Quantum Theory of Conducting Matter

- Newtonian Equations of Motion for a Bloch Electron

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Quantum Theory of Conducting Matter
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Format:
E-bog, PDF
Udgivelsesdato:
19-12-2007
Sprog:
Engelsk
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The measurements of the Hall coe?cient R and the Seebeck coe?cient H (thermopower) S are known to give the sign of the carrier charge q. Sodium (Na) forms a body-centered cubic (BCC) lattice, where both R and S are H negative, indicating that the carrier is the 'electron. ' Silver (Ag) forms a face-centered cubic (FCC) lattice, where the Hall coe?cient R is negative H but the Seebeck coe?cient S is positive. This complication arises from the Fermi surface of the metal. The 'electrons' and the 'holes' play important roles in conducting matter physics. The 'electron' ('hole'), which by de?- tion circulates counterclockwise (clockwise) around the magnetic ?eld (?ux) vector B cannot be discussed based on the prevailing equation of motion in the electron dynamics: dk/dt = q(E +vB), where k = k-vector, E = electric ?eld, and v = velocity. The energy-momentum relation is not incorporated in this equation. In this book we shall derive Newtonian equations of motion with a s- metric mass tensor. We diagonalize this tensor by introducing the principal masses and the principal axes of the inverse-mass tensor associated with the Fermi surface. Using these equations, we demonstrate that the 'electrons' ('holes') are generated, depending on the curvature sign of the Fermi s- face. The complicated Fermi surface of Ag can generate 'electrons' and 'holes,' and it is responsible for the observed negative Hall coe?cient R H and positive Seebeck coe?cient S.

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Udgivelsesdato:
19-12-2007
ISBN13:
9780387741031
Forlag:
Springer
Format:
PDF
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