Free electrons –or simple metals Isolated atom – or good insulator From Isolation to Interaction From Isolation to Interaction Rock Salt Sodium Electron (“Bloch”) waves Localised electrons “particle wave duality” in the solid state Interesting stuff happens in between Credits C. Bergmann
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Free electrons – or simple metals Isolated atom – or good insulator From Isolation to Interaction Rock Salt Sodium Electron (“Bloch”) waves Localised electrons.
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Free electrons –or simple metals
Isolated atom – or good insulator
From Isolation to InteractionFrom Isolation to Interaction
Rock Salt Sodium
Electron (“Bloch”) waves
Localised electrons
“particle wave duality” in the solid
state
Interestingstuff happens in between
Credits C. Bergmann
Energy
Orbital OverlapAtomic Distance
BandwidthBandwidthA
tom
ic
en
erg
y
levels
Con
tin
uou
s en
erg
y s
pect
rum
Bandwidth
Interestingstuff happenshere: U ~ W
Narrow Bands – but where?Narrow Bands – but where?
Organic Organic molecular molecular
crystalscrystalsTransition metal Transition metal oxides & compoundsoxides & compounds