[NewCandle] Image magnetic monopole charge

[Keith Nagel]

Hey Nick,

you write:
>Never tried that... but dang, what an excellent idea.
>  A flat plate cap with Bi2Te3 would in theory produce
> a field like a bar magnet, wouldn't it?  N monopoles
> emitted from one face, S monopoles from the other?

Yes, that is my point exactly. And as it is impossible
for a charged capacitor to have a dipole magnetic
field around it, measuring such would be proof of
the accumulation of magnetic charges in the dielectric
material. The major source of artifact in my suggested
experiment is the leakage current through the dielectric.
The resulting magnetic field would interfere with the
measurement, but in principle it could be nulled using
a thin wire penetrating both plates and dielectric through
which a dc current is passed of opposite sign to the
leakage current. It's also worth noting that the field
from the accumulated monopoles would be orthogonal
to the leakage current field, so with careful alignment
of the magnetic probes one could attempt the measurement
without the compensating circuit. I have some fairly
sensitive hall probes that can measure down to
about .05 gauss. I wonder just how feeble the
expected field would be for reasonable voltages?

Sadly, I no longer have the carte blanche access to
the electronic journals that I had in NYC. So I can't
grab a copy of ref 11 to see any details of what
was being claimed. I did find a lot of related stuff
on the web, such as these links.

http://www.sciencemag.org/cgi/content/abstract/1167747
http://meetings.aps.org/Meeting/MAR09/Event/100709
http://www.symmetrymagazine.org/breaking/2009/01/29/making-magnetic-monopole
s-and-other-exotica-in-the-lab/

Zhangs email address is listed at the first link, maybe
worth contacting him if we try to do this, at least
to get his input on how feeble the resulting fields
would be for reasonable experimental implementations.

K.