TcSUH EventS
TcSUH Annual Student Research Symposium
40th Semiannual Fall TcSUH Student Symposium
by: TcSUH Administration
Date: Monday December 06, 2010
Time: 1:00 pm – 5:00 pm
Location: Houston Science Center – Building 593 — Room 102
Overview
All members of TCSUH are invited to attend the 40th Semiannual Student Symposium for presentations of original student work. The Student Symposium will begin at 1:00 p.m. with a brief review of the Center's progress during 2010 and an outline of plans for the future. The afternoon will then continue with a series of 15-minute presentations representing novel work by undergraduate and graduate students from each laboratory. A Symposium Program, including the schedule and abstracts for each presentation, will be provided at the door. The Student Symposium Buffet will precede at 11:30 a.m., HSC for TcSUH members only.
The TcSUH Student Symposium Program is available for download.
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Special Seminar
Nanostructures to Examine Strongly Correlated Materials: Magnetite
by: Prof. Douglas Natelson
Date: Thursday November 18, 2010
Time: 12:00 pm – 1:00 pm
Location: Houston Science Center – Building 593 — Room 102
Overview
Strongly correlated electronic materials, a huge class of materials for which single-particle band structure fails to describe their electronic properties, remain a topic of great interest. Such systems often exhibit competing electronic and magnetic phases, resulting in dramatic physical phenomena such as metal-insulator transitions and superconductivity. Magnetite, Fe3O4, is an archetypal strongly correlated transition metal oxide that, in bulk, exhibits a structural and electronic phase transition near 120 K from a moderately conducting high temperature state to a considerably more insulating low temperature state. The nature of the low temperature state remains a source of controversy after more than seven decades of investigation. Using nanostructure techniques and magnetite films, we demonstrate that it is possible to destabilize the insulating state with a sufficiently large in-plane electric field. We show that this destruction is not due to simple self-heating, and present evidence that suggests it is analogous to Landau-Zener breakdown of the correlated state, with disorder also playing an important role. Finally, we will use these studies to demonstrate that contact effects, scrupulously avoided in most experiments, provide additional insight into the conduction mechanism in this strongly correlated material.
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Bi-Weekly Seminar
Interface Magic in Nanostructural Metamaterials
Date: Friday September 03, 2010
Time: 12:00 pm – 1:00 pm
Location: Houston Science Center – Building 593 — Room 102
Overview
Interface engineered metamaterial is not the materials engineering, it is the engineered materials with designed innovative properties. In the nanoscale materials, interface plays a key role in governing their physical properties and resulting in the discovery of various anomalous physical phenomena with excellent opportunity for new active device and engineered nanosystem developments. Recently, we have systematically focused on the studies of multilayered layered structures and nanoscale ordered structures such as multilayered ferroelectric BaTiO3/SrTiO3 heterostructures and ferromagnetic LaBaCo2O5.5 nanostructures and found many interesting physical phenomena, such as domain clamped ferroelectric phenomena, unusual magnetic properties, and ultrafast oxygen exchange chemical dynamic behavior. Also, a series of models were developed to understand these interface phenomena. Details will be presented in the talk.
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Special Seminar
Multiferroicity in the New Spin-Spiral Antiferromagnets Cupric Chloride and Bromide CuX2 (X=Cl, Br)
by: Reinhard K. Kremer
Date: Monday August 16, 2010
Time: 12:00 pm – 1:00 pm
Location: Houston Science Center – Building 593 — Room 102
Overview
The quest for new high performance multiferroic materials is stimulated by the expectation to effectively control magnetic properties by electric felds and, vice versa, the electric polarization by magnetic felds. Multiferroic materials may open new routes for novel magneto-optical and magnetoelectric high performance easily tuneable multifunctional energy effcient memory devices.
Spin-spiral multiferroics show a particularly strong sensitivity of the ferroelectric polarization to an external magnetic feld. Helicoidal magnetic structures can be established in one-dimensional magnets which are subject to magnetic frustration due to competing nearest and next-nearest neighbor superexchange and super-superexchange interaction along the chains. I review the properties and present recent results of one of the best investigated multiferroic systems, LiCuVO4, and discuss two new non-oxide spin-spiral magnet systems, CuX2 (X=Cl, Br) that also show multiferroic behavior.
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Conferences and Workshops
2010 Applied Superconductivity Conference
by: TcSUH Administration
Date: Sunday August 01, 2010
Time: 12:00 am – 12:00 am
Location: Washington, D. C. USA
Overview
ASC 2010 will be a five day conference bringing together leaders in the commercial, military, research, university, and industrial communities from around the world to discuss progress and challenges in the field of applied superconductivity. There will be several plenary sessions focused on overviews and the broad prospectus of the field, exhibitors from major superconducting and cryogenic companies, as well as daily technical discussions from an anticipated 1400 attendees from 70 countries.
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