Unformatted text preview: t to make a good insulating oxide layer of GeO2 (good SiO2 is easy) and because the bandgap is too small and device performance will suffer at moderately elevated temperatures (think about your CPU chip which can reach nearly 100 C). Make an energy level diagram for two Ge atoms bonding to each other. In this case, the starting orbitals will be a mixture of the 4s and 4p levels called a sp3 hybrid orbital. These orbitals are literally a mixture of the one s and three p orbitals, so there are four sp3 hybrid orbitals per Ge atom and a total of 8 electrons could go into these orbitals. a. How many electrons total are in the 4s and 4p orbitals for isolated Ge atoms? b. How many will there be in the sp3 hybrid orbitals? c. If four sp3 orbitals from each Ge atom mix together to form bonding and antibonding orbitals, how many electrons can the bonding orbitals hold? d. How many electrons will occupy these orbitals? e. Are the bonding orbitals full, partially‐full, or empty? f. Are the antibonding orbitals full, partially‐full, or empty...
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- Spring '14