2nd talk. The Mott transition

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2nd talk. The Mott transition

The Mott transition. Paramagnetic state

Atomic lattice single orbital per site and average occupancy 1: half filling

Hopping

saves energy t

Double occupancy

costs energy U

Small U/t

Metal

Increasing U/t

Mott transition

Large U/t

Insulator

W

Double

occupancy

Single

occupancy

U

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