Bulletin of the American Physical Society
2006 Texas Section of the APS Joint Fall Meeting
Thursday–Saturday, October 5–7, 2006; Arlington, Texas
Session PL1: Plenary Session I |
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Chair: Charles Myles, Texas Tech University Room: UT Arlington, University Center Rosebud Theater |
Friday, October 6, 2006 9:00AM - 9:30AM |
PL1.00001: Superconductivity: Developements And Prospects in Light Element Systems Invited Speaker: The concept of electron pairing, central to the phenomenon of superconductivity, owes its origin to the earliest claim of high temperature superconductivity in a very light element system (an alkali ammine). The presence of high dynamic energy scales makes light element systems attractive from the standpoint of the standard electron-phonon pairing mechanisms, but among the elements themselves, and under normal conditions it is well known that superconducting transition temperatures (Tc) are quite limited. From the latecomer superconductor MgB$_2$ ((Tc) $\sim$ 40K) it is now clear that for the light elements in combination the situation can change radically. Structures admitting large numbers of electrons per unit cell (and a corresponding proliferation of occupied bands) can be especially favorable for superconductivity. It was already recognized by Kamerlingh Onnes that this important phenomenon could eventually impact the energy sector. Accordingly it is of interest to examine both the pathway and the prospects for higher temperature superconductivity in systems of light elements (for example high hydrides) particularly with a view towards invoking a concept of chemical pre-compression. [Preview Abstract] |
Friday, October 6, 2006 9:30AM - 10:00AM |
PL1.00002: New Findings in Materials Under Pressure Invited Speaker: New static high-pressure techniques provide the ability to tune interatomic and intermolecular interactions in condensed matter over a broad range of conditions, from near zero pressure to $>$300 GPa and variable temperatures from cryogenic to thousands of degrees. Coupled with the increasing array of measurements that can be performed under extreme $P-T$ conditions, these investigations have resulted in new findings in structure, bonding, and dynamics in solids, liquids, and fluids, as well as allowing the creation and recovery of new materials. Examples include novel transitions in atomic, diatomic, and polyatomic systems; structure and bonding in molecular mixtures; pressure-induced metallization and superconductivity, and unexpected discoveries in soft matter and biological systems. [Preview Abstract] |
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