I think that the Debye temp is useful, although I am not sure if it is the
acoustical or optical phonons that are actually involve. I have a better
"feel" for the optical phonon moderating the reaction ( as seen from the duel
laser stuff) than the acoustical phonon that seem to be more involved with
setting the Debye temps. But I am still "confused" exactly over such phonon
modes and the ultimate interactions needed for the reactions. My mental model
more easily sees the optical phonons pushing D's together then it sees
acoustical phonons doing that.
The heat release via phonons (effected by the Debye temp) is just part of the
problem. There is also the reaction itself which seems to like the higher
temps. This seems to be an exponential term that involves the temperature and
the energy of vacancy formation. You need higher temps or a lower Ef.
Lowering the Ef even a little seems to really help. Notice in the codep exper.
that the codep on Au plating works so much better than just directly on Cu. Au
in Pd really drops the Ef.
D2
Date: Fri, 26 Jul 2013 14:06:35 -0400
Subject: Re: [Vo]:Debye of Pd
From: hveeder...@gmail.com
To: vortex-l@eskimo.com
If being above the Debye temperature is one of the preconditions for excess
heat, then Pd systems don't need an application of heat if they are done at
room temperature (20C), since the Debye temperature of Pd is several degrees
lower than room temperature.
Harry
On Thu, Jul 25, 2013 at 7:47 AM, Frank Roarty <froarty...@comcast.net> wrote:
HarryDidn't Arrata have heat with PD powder at room temp? Maybe anomalous heat
is a function of transition thru Debye temp and those experiments extracting
heat provide repeated opportunities to make this transition at a higher rate.
Fran
