Review of Modern Physics Quantum Mechanics. Particle-wave duality Blackbody radiation The...
Transcript of Review of Modern Physics Quantum Mechanics. Particle-wave duality Blackbody radiation The...
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Review of Modern Physics
Quantum Mechanics
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Particle-wave duality
• Blackbody radiation
• The photo-electric effect
• The Bohr model
• Electrons diffraction
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Blackbody radiation
• Max Plank (1901) - emissão de múltiplos inteiros de energia
Spectral density:
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The photo-electric effect
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The photo-electric effect
• Lenard (1899) – emissão de partículas negativas
• (1902) – foi observado, que há emissão só quando a frequência é assima de um certo valor e Ec aumenta com a frequência
• Einstein (1905) – luz é uma partícula com energia
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The Bohr model (1913)
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Compton effect (1923)
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Electrons Diffraction
• De Broglie (1924) postulou, que corpos materiais podem assumir comportamento ondulatório.
• Davidson and Germer (1927) – difração de elétrons em cristal de níquel.
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• Ondas e partículas
• Princípo de incerteza de Heisenberg
• Postulados da Mecânica Quântica
• Operadores de energia e momento
• Equação de Schrödinger
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Aplicações simples da MQ
• Poço infinito
• Barreira de potencial
• Tunelamento
• Poço finito
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Poço infinito
B=0
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Poço infinito
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Barreira de potencial
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Tunelamento
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Poço finito
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Poço finito
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Elétrons em cristais
• Modelo de Kronig-Penney
• Bandas de energia em cristais
• Massa efetiva
• Distribuição de Fermi-Dirac
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Modelo de Kronig-Penney
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Massa efetiva
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Distribuição de Fermi-Dirac
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