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## Homework Statement

Some atoms in Cu crystal (Cu has a FCC lattice) are replaced by

Zn atoms. Taking into account that Zn is bivalent, while Cu is monovalent,

calculate the atomic ratio of Zn to Cu in ZnCu alloy at which the Fermi

surface touches the first Brillouin zone faces. Use the free-electron model and assume that lattice

constant does not change with Zn doping.

## Homework Equations

N/A

## The Attempt at a Solution

I would like some help getting started on this problem. Any help is much appreciated thank you very much!