Bulletin of the American Physical Society
2007 APS April Meeting
Volume 52, Number 3
Saturday–Tuesday, April 14–17, 2007; Jacksonville, Florida
Session H10: Static Few-Body Effects (Bound States) |
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Sponsoring Units: GFB Chair: Viatcheslav Kokoouline, University of Central Florida Room: Hyatt Regency Jacksonville Riverfront City Terrace 6 |
Sunday, April 15, 2007 8:30AM - 8:42AM |
H10.00001: Energy Distribution of SiO2/Si Interface Traps: Experiments and Theory Chih-Tang Sah, Bin B. Jie, Zuhui Chen Experiments over the history suggested U-shaped density of state of electronic states localized at the surface and interfaces of crystalline silicon. Experimental results are reviewed. Slater's 3-dimensional localized perturbation theory for bound electronic states at bulk donor and acceptor impurity ions in solids, extended by Sah, anticipates U-shaped energy distribution of bound electronic states from neutral electron and hole interface traps due to random variations of the Si:Si and Si:O bond angle and length. Theory and experiments are described. [Preview Abstract] |
Sunday, April 15, 2007 8:42AM - 8:54AM |
H10.00002: Effects of Concentration and Energy Distribution of Electronic Interface Traps on Electrical Characteristics of Metal-Oxide-Silicon (MOS) Capacitors and Transistors. Bin B. Jie, Zuhui Chen, Chih-Tang Sah Electronic traps, or electron and hole traps, at the interface of oxidized silicon pose increasing limits on the performances and endurance of metal-oxide-silicon capacitors and transistors and integrated circuits for digital, analog, and memory applications. Effects of increasing concentration and broad energy distributions of electronic interface traps on the lineshapes of the high and low frequency capacitance and dc recombination current characteristics as a function of gate voltage or surface potential are described and compared with experiments. [Preview Abstract] |
Sunday, April 15, 2007 8:54AM - 9:06AM |
H10.00003: ABSTRACT WITHDRAWN |
Sunday, April 15, 2007 9:06AM - 9:18AM |
H10.00004: A Moebius-Strip Representation of the Matrix-Product Periodic System of Diatomic Molecules Ray Hefferlin Periodic systems of diatomic and triatomic molecules are well tested and documented [1]. The 3D form of the diatomic system consists of blocks, each having all molecules with two fixed-row atoms, on which the molecules are addressed by their atomic group numbers. The blocks can be replaced by tori [2], but in either case many redundancies exist (e.g., CO and OC). The tori [3] may be replaced by Moebius strips [4] which remove the redundancies. This representation of the periodic system will be presented. [1] Hefferlin, R., ``The Periodic Systems of Molecules, Presuppositions, Problems, and Prospects,'' Baird, D., Scerri, E., and McIntyre, L., Editors, \textit{Philosophy of Chemistry, Boston Studies in the Philosophy of Science}, Springer, Dodrecht, the Netherlands, 2006. [2] Hefferlin, R,. ``Matrix-Product Periodic Systems of Molecules,'' J. Chem. Inf. Comput. Sci, 34, 314-317 (1994). [3] Hall, D. E, ``Quantitative Evaluation of Musical Scale Tunings,'' AJP, 42, 543-552 (1974). [4] Blau, S. K., ``Good Music unfolds in Small Steps,'' Physics Today, October 2006, pp. 19-21. [Preview Abstract] |
Sunday, April 15, 2007 9:18AM - 9:30AM |
H10.00005: Correlation between bound and continuous states of three identical particles Nicolas Douguet, Viatcheslav Kokoouline Study of degenerate cold gazes represents today a wide field of physics, because phenomena in cold gazes are relevant in several other fields of physics, like for instance, superconductivity or astrophysics. In this work, we discuss collisions of three identical particles in ultra-cold gazes, by considering the symmetry of the total wave function of the system. Thus, we use either laboratory-frame, hyperspherical, or Jacobian coordinates, depending on which ones are best suited to describe the different configurations of the system. Precisely, for this purpose, we describe the wave function of the system at large distances, in order to understand the states of the particles before and after the three-body collision, but also consider the wave function at short distances during the actual collision process. Then, we are able to predict the possible quantum states of the particles after collision, by using symmetry considerations. In particular, we describe the recombination of the system into one free particle and a dimer. The result can be used for example, to identify possible decay products of quasi-stationary Efimov states. [Preview Abstract] |
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