Semiconductor analog to phonons

There is in semiconductor theory a conceptual particle called a "hole" which
represents the absence of an electron in the lattice of the substrate. It
has the same properties as an electron except opposite charge and direction.
Likewise, a particle called a "phonon" can be conceived. It would have
properties derived from the medium in which the sound traveled; in air it
would essentially be a nitrogen molecule. Since the collisions between
molecules are not perfectly elastic, phonons would "tire out" and stop
moving as their energy dissipated. They would not obey quantum laws which
in any event become insignificant in the large collections of particles
which is the domain of sound.

Just as semiconductor holes cannot travel beyond the boundary (juncture) of
the substrate, phonons would not be able to travel between media. They
would instead transfer their energy to phonons in the other media at the
juncture. And, of course, phonons would not be able to cross empty space as
photons do.

Do phonons exist? Yes, to the extent the concept is useful.

Is it a useful concept? This is uncertain.


SMTPOriginator: tuning@eartha.mills.edu
From: Aline Surman
Subject: New Year
PostedDate: 01-01-98 18:19:25
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On Thu, 1 Jan 1998, Aline Surman wrote:
> ... the real New Year begins on the Equinox, which is 11 days earlier.

Just a small nit: I think you mean the Winter Solstice. The Equinoxes
(equinoces?) are in May and September.

Solstice is the _Real_ Reason for the Season!

--pH http://library.wustl.edu/~manynote
O
/\ "Do you like to gamble, Eddie?
-\-\-- o Gamble money on pool games?"

NOTE: dehyphenate address to remove spamblock. <*>


SMTPOriginator: tuning@eartha.mills.edu
From: mr88cet@texas.net (Gary Morrison)
Subject: RE: PLANCK CONSTANT
PostedDate: 01-01-98 20:25:12
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>...then, our New Year's day is sharp to the real New Year, much the
>same as our major 3rd is sharp to the 5/4...that's interesting to
>me

As long as you take it as more of a loose philosophical argument than a
scientific one, then I'd agree.

But uh, wouldn't that be a solstice rather than an equinox?


SMTPOriginator: tuning@eartha.mills.edu
From: mr88cet@texas.net (Gary Morrison)
Subject: Re: CD idea
PostedDate: 01-01-98 21:06:35
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