Sam Wormley wrote:

Sam Wormley wrote:

Electrons lose their mass in carbon sheets (Nov 9)
http://physicsweb.org/article/news/9/11/6

nd 201).

Experimental Observation of Quantum Hall Effect and Berry's Phase in
Graphene
http://arxiv.org/abs/cond-mat/0509355

Authors: Yuanbo Zhang, Yan-Wen Tan, Horst L. Stormer, Philip Kim
Subj-class: Mesoscopic Systems and Quantum Hall Effect; Strongly
Correlated Electrons

When electrons are confined in two-dimensional (2D) materials,
quantum mechanically enhanced transport phenomena, as exemplified
by the quantum Hall effects (QHE), can be observed. Graphene, an
isolated single atomic layer of graphite, is an ideal realization
of such a 2D system. Here, we report an experimental investigation
of magneto transport in a high mobility single layer of graphene.
Adjusting the chemical potential using the electric field effect,
we observe an unusual half integer QHE for both electron and hole
carriers in graphene. Vanishing effective carrier masses is
observed at Dirac point in the temperature dependent Shubnikov de
Haas oscillations, which probe the 'relativistic' Dirac

-------------------
have you heared about the new basic physics law:

'No mass - No real physics'
it is a new 'litmus paper' to distinguish between real physics
and speculative mumbling.

once you start to talk about :
'vanishing effective Carrier masses'
you lost the physics ground beneath your legs
and start mathematical mumblings
or at the good case - speculative vague and most probably
useless physics
in more simple words:
physics that does not lead you far away
may be in the good case some very partial extrapolation of data
(that is the only real power of mathematics but no *real* physics.)

without knowing why and how.
or still in other words very far from getting to the physics scratch.

RP wrote:

Sam Wormley wrote:

Electrons lose their mass in carbon sheets (Nov 9)
http://physicsweb.org/article/news/9/11/6

Two teams of physicists have discovered previously unseen exotic
behaviour in sheets of carbon atoms. The teams have shown that
electrons
move through the sheets as if they have no rest mass. They have also
observed a minimum value of conductivity for the sheets and an
unusual
form of the quantum Hall effect (Nature 438 197 and 201).

There is no such thing as rest mass. There is however rest energy of a
system of charges (not at rest wrt each other though). m_o = f/a, so
when either f or a equal zero, then m_o is undefined. But only when f
and a are equal zero is the particle at rest wrt an inertial frame.
Mass is meaningful only in the context of relative motion.

And BTW, I predicted that electrons are massless some time ago here,
their curved trajectories are only interpreted as products of inertia,
the rest mass being fictitious. Electrons move along geodesics in
curved space-time. If it works for gravitational fields, then it must
also work for electromagnetic fields. According to Weber, at least two
charges are required in a system in order to derive anything like *mass*.

The unusual form of the Hall effect is probably derivable from Weber's
premises as well.

You can reject my input if it suits you, and I'm sure you know that
I'm not especially dissuaded by so-called acceptable theory, but then
again this isn't the first physicsweb article that has supported my
radical arguments.

In the near future I expect you'll be posting news of electrons having
instantaneous speeds of c wrt each other. Already predicted as well :)

Richard Perry

If gravity is a Le Sage type phenom then it
takes considerably more than two members
to register a 'mass'.
John