MYSTERY OF HEAVY-FERMION SUPERCONDUCTORS; PAULI PRINCIPLE VIOLATION
Date: Thursday, March 24, 2005 @ 22:50:50 GMT
Topic: Science


POINT-CONTACT SPECTROSCOPY DEEPENS MYSTERY OF HEAVY-FERMION SUPERCONDUCTORS, March 24
Theoretical understanding of heavy-fermion superconductors has just slipped a notch or two, says a team of experimentalists.

Researchers from the University of Illinois at Urbana-Champaign and Los Alamos National Laboratory recently used a sensitive technique called point-contact spectroscopy to explore Andreev reflection between a normal metal and a heavy-fermion superconductor. Conventional theories cannot account for their data, the scientists report.

Full story at http://www.physorg.com/news3498.html

THEORIES OF HIGH-TEMPERATURE SUPERCONDUCTIVITY VIOLATE PAULI PRINCIPLE, March 24
Scientists seeking to explain high-temperature superconductivity have been violating the Pauli exclusion principle, a team of researchers from the University of Illinois at Urbana-Champaign and Rutgers University report. Any theory that does not embrace the Pauli principle has a lot of explaining to do, they say.

The basic organizing precept behind the periodic table is the Pauli principle, which says that electrons with the same spin cannot occupy the same energy state. The Pauli principle leads to the shell structure of atoms, and is inviolate for electronic systems. Many researchers, however, have been breaking this important rule when proposing theories to explain the mechanism behind high-temperature superconductivity.
Full story at http://www.physorg.com/news3496.html


PROBING QUESTION: WHAT IS DARK ENERGY AND HOW DO WE KNOW IT'S THERE?, March 24
"Dark energy," said Donald Schneider, professor of astronomy at Penn State, "appears to be the major component of the universe." It's not the same thing as dark matter: ordinary planets, rocks, dust, and particles that do not emit light and therefore cannot be easily detected. It's something fundamentally different, outside our current understanding of physics -- a substance totally new to science.
Full story at http://www.physorg.com/news3500.html





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