Fluctuations in One-Dimensional Quasi-periodic Metallic Chains
Hold the Key to Room Temperature Superconductivity?
Principal, W2AGZ Technologies
Visiting Scholar in
Applied Physics, Stanford University (2005-2008)
EPRI Science Fellow (Retired)
IBM Research Staff Member Emeritus
Senior Life Fellow, APS
Fellow, IOP (UK)
http://www.w2agz.com/BD_APS-March-2010.htm (This Page)
Session T41: Focus Session: Search for New
Nanotubes and Fullerides
Wednesday, 17 March 2010, Room F152
Oregon Convention Center
Talk T41.00008, 4:42 PM - 4:54 PM
Download Presentation (pdf
ppt (1.69 MB))
Is the number 64 REALLY 65? !!
(Send your answer to
Periodic Functions," A. S. Besicovitch, (Dover
Publications, USA, 1954).
PhD thesis addressed the optical properties of thin
germanium films as a function of crystalline order, ranging
from amorphous to single crystal homo/hetero-epitaxial
samples. Their properties were measured using a
combination of reflectance and transmission experiments
subsequently analyzed to yield optical constants which
presumably were related to their "band structure." My
problem was that I had no idea what constituted the "band
structure" of any system save those of perfect periodic
crystalline solids. One afternoon, after squash, I
wandered down Brattle Street into a book store next to a bar
Rudy Ludeke and I would patronize from time to time, where I
spotted Besicovitch's little book. At the time, I thought
Bohr's theory might apply to all non-crystalline solids (it
doesn't, and you won't find it referenced in my thesis), but
I've been fascinated with his "middle road" between Fourier
series and Fourier transforms ever since, as one can see
from the references to follow. I do think the
formalism holds the key to "room temperature"
BTW, in retrospect, probably the most profound aspect of my
thesis was the discovery of the "strained lattice" effect
arising from the difference in thermal expansion properties
between substrate and film. See pages 201-207 of the
above thesis link, and pages
3119-3119 of its publication in JAP.]
Structure of Disordered Solids and Almost Periodic Functions,"
P. M. Grant, BAPS Series II, Vol. 18, No. 3. p. 333, BK9,
APS March Meeting, 19-22 March 1973, San Diego.
[Those attending the
1973 March Meeting are more likely to remember the
announcement by Alan Heeger's Penn Group of "superconducting
fluctuations around 60 K" in TTF-TCNQ than my talk. I was
just coming off a staff assignment at IBM Research San Jose
and had spent a few weeks in the fall of 1972 revisiting
some ideas I had on electronic structure of disordered
semiconductors while a graduate student in Bill Paul's group
at Harvard. It turns out I had "discovered" the formalism
for the band structure of quasicrystals. Of course, right
after returning home, Rick Greene and I immediately started
working on TTF-TCNQ!]
Simulations of Fermions on Quasiperiodic Chains,"
P. M. Grant, APS March Meeting, 16-20 March 1992,
[From 1982-86, before
the eruption of high temperature superconductivity, I
collaborated with Doug Scalapino and his students at UCSB
involving quantum Monte-Carlo simulations on various "ideal"
fermion/spin systems. One of these efforts was a
collaboration with Bernd Schuttler on
random exchange in AF chains. We found that long
range order in the thermodynamic limit disappeared...not all
that surprising. From 1990-92, I spent a sabbatical in
Mexico at UNAM and had access to a Cray YMP, and tried the
same problem, but not on a random chain, but quasiperiodic.
Amazingly, as the chain length increased, the susceptibility
seemed to diverge! This needs to be checked out.]
Find Extraordinarily High Temperature Superconductivity in
Bio-Inspired Nanopolymer," Paul M. Grant, Physics Today, May 1998.
[My whimsical SciFi
essay covering the great discovery in 2028 of an embodiment
of Bill Little's model of exciton mediated
superconductivity. You eventually "get what you need." (see
SuperTunes). Bill's model
envisioned a periodic one dimensional metallic "spine" as
the carrier of superconductivity. The problem was that
Fermi-surface nesting induced CDW instabilities would gap
the Fermi level before BCS pairing could yield the lowest
energy state. This "paper" solved that dilemma!]
Tribute to the "Usual Suspects"
on the Occasion of
Portland APS March 2010
how much electricity Americans are generating/consuming right now?
For California, click
How much could be solar? Go to Stanford's Jasper Ridge Sun Field
For the rest of the country, go to
Its history, theory, phenomenology and applications?
Visit my SuperWiki
all and any aspects of the Electricity enterprise?
Visit my ElectricWiki