about the formulisms of transmission coefficient and conductance

[Yu Hailin]

Dear all,

I want to know the formulisms to calculate the transmission coefficient and conductance in ATK.  In some refernces, the conductance is equal to e*e*T(Ef)/h, where T(Ef) is the transmission coefficient at Fermi level. But in ATK, the units of transmission coefficient is 2*e/h, so I want to know the formulism to calulate the transmission coefficient and conductance. Thanks in advance.

Best Rgards!

Yu Hailin 

[kstokbro]

The conductance is e*e/h T(ef) per spin channel, for 2 similar spin channels this gives 2 e*e/h T(ef)

[Yu Hailin]

Thanks!