Question:
... snip ...
What is the value of T for an electron in GaAs?
Solution:
It is a value hunting exercise. By one paper, we found out L=175Å. An Å is a Angstrom, which is basically 10−10 meters.
On the effective mass of an electron in GaAs, another paper tell us the answer is 0.067m0, but what is m0? Turn out m0 is the electron mass and we can find it in the NIST values ,which is 9.10938291×10−31 kg
To compute T, we will also need the Planck's constant, from the NIST website, it is 6.62606957×10−34 J s.
So we compute T=8mL2h=2.2567×10−13 s.
The last piece of the puzzle is a femtosecond, a femtosecond is basically 10−15 second, so the final answer is 225.67 femtoseconds.
... snip ...
What is the value of T for an electron in GaAs?
Solution:
It is a value hunting exercise. By one paper, we found out L=175Å. An Å is a Angstrom, which is basically 10−10 meters.
On the effective mass of an electron in GaAs, another paper tell us the answer is 0.067m0, but what is m0? Turn out m0 is the electron mass and we can find it in the NIST values ,which is 9.10938291×10−31 kg
To compute T, we will also need the Planck's constant, from the NIST website, it is 6.62606957×10−34 J s.
So we compute T=8mL2h=2.2567×10−13 s.
The last piece of the puzzle is a femtosecond, a femtosecond is basically 10−15 second, so the final answer is 225.67 femtoseconds.
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