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Fernando Nogueira edited Magnetic response.tex
over 9 years ago
Commit id: 7abe8b0951ef4cd7efea151f59eea0e54b3b93cc
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second one is the Zeeman term that represents the coupling of the
electronic spin with the magnetic field.
As our main interest is the
evaulation evaluation of the magnetic susceptibility,
in the following we consider a perturbative uniform static magnetic
field \(\vec{B}\) and zero total spin. In the Coulomb gauge the
corresponding vector potential, \(\vec{A}\), is given as
...
\end{equation}
Unfortunately, the integration path can be any one that connects the two
points \(\vec{r}\) and \(\vec{r}'\), so an infinite number of choices
is possible, each yielding slightly different results for the
magentic magnetic
properties. There are two different integration paths that have been
used in the literature. The first was proposed by Ismail-Beigi,
Chang, and Louie (ICL) in 2001\cite{Ismail_Beigi_2001} and gives the