stm keywords

STM calculator

stm.z0

If texttt{stm.z0} is set to $z_0$, then the tunneling matrix elements are computed on the plane $z = z_0$ using Eq. ref{eq:bardeenM}. Moreover, the system is decomposed into orbitals below (sample) and above (tip) the $z_0$-plane. Thence, the PDOS of the sample and tip ($n^S$ and $n^T$), and the sample and tip wavefunctions ($psi^S$ and $psi^T$) depend on the value of texttt{stm.z0}.

type: scalar

example: stm.z0 = 20.3

stm.voltage

Bias between the sample and tip.

type: scalar

example: stm.voltage = -0.1