Oklahoma State Physics Department
Seminars and Colloquia
March and April, 1994
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Due to Spring Break no seminars and
colloquia scheduled March 7-11, 1994
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Oklahoma State Physics Department
Seminars and Colloquia, March 14-18, 1994
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Oklahoma High Energy Physics Seminar
on Talk-Back Television:
Speaker: Dr. P. Jain
University of Oklahoma
Date: Thursday, March 17
Time: 1:45 PM
Place: Classroom Building, Room 106
Title: Mysteries in the A Dependence
of Charm and Bottom
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Physics Colloquium:
Speaker: Dr. Michael L. Dennis
Naval Research Laboratory, DC
Date: Thursday, March 17
Time: 3:30 PM
Place: PS 110
Title: Generation of Ultrashort Solitons
and High Powers in Fiber Lasers
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Journal Club on Statistical Mechanics
and Condensed Matter Physics (Informal):
Speaker: Dr. Bernie Olivier
Oklahoma State University
Date: Friday, March 18
Time: 2:00 PM
Place: PS 147
Title: Coagulation Rate Measurement
of a Simple Aerosol Using
Light Scattering Techniques
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Oklahoma State Physics Department
Seminars and Colloquia, March 21-25, 1994
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Journal Club on Statistical Mechanics
and Condensed Matter Physics (Informal):
Speaker: Dr. H.L.Scott
Oklahoma State University
Date: Tuesday, March 22
Time: 2:00 PM
Place: PS 147
Title: Molecular Dynamics Simulations
in Lipid Bilayers
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Oklahoma High Energy Physics Seminar
on Talk-Back Television:
Speaker: Dr. H. Badran
Oklahoma State University
Date: Thursday, March 24
Time: 1:45 PM
Place: Classroom Building, Room 106
Title: Ultrahigh Energy gamma-Ray
Astronomy
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Physics Colloquium:
None (This is week of APS Meeting)
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Journal Club on Statistical Mechanics
and Condensed Matter Physics (Informal):
Moved to Tuesday
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Oklahoma State Physics Department Seminars
and Colloquia, March 28-April 1, 1994
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Special Seminar
Speaker: Dr. M. B. Johnson
IBM Research Division,
Zurich Research Laboratory,
CH-8803 Rueschlikon, Switzerland
Date: Monday, March 28
Time: 3:30 PM
Place: 106 Noble Research Center
Title: Cross-Sectional Scanning
Tunneling Microscopy of
Nanostructures
Abstract:
Man-made semiconductor nanostructures
provide us with new ways to investigate
condensed matter under conditions of
reduced dimensionality (e.g. the quantum
hall effect). Moreover, they are
revolutionizing optoelectronic
technology (e.g. quantum-well laser
diodes).{1} Unfortunately, conventional
analytical techniques measure
structural, chemical, or electronic
properties that are averaged in one or
more dimensions over several tens of
nanometers and thus they are not
sufficient to physically characterize
such nanostructures. On the other hand,
scanning tunneling microscopy (STM) is a
technique that measures such properties
with atomic or near-atomic resolution in
the lateral and depth dimensions (all
three spatial directions). Thus STM on
appropriate cross-sectional
semiconductor surfaces allows the
measurement of such properties across
buried nanostructures on an atomic or
near-atomic scale. In this talk, I
describe recent work involving the
UHV-cleaved (110) surface of III-V
compound materials. In particular, I
demonstrate atomic-scale chemical
sensitivity which allows the assessment
of interface roughness as well as alloy
clustering and ordering in various
heterostructure systems including
GaAs/AlGaAs planar and wire systems.
Moreover, I demonstrate that individual
dopants can be imaged directly, which
allows the measurement of doping
profiles in modulation-doped structures
with atomic precision. With these
abilities, cross-sectional STM is
uniquely able to measure the important
physical properties of suitable
semiconductor nanostructures on an
atomic or near-atomic scale.
1. Physics Today, June 1993, Special
issue: "Optics of Nanostructures".
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Chemical Engineering Seminar Series:
Speaker: Dr. Bruce J. Ackerson
Oklahoma State University
Date: Tuesday, March 29
Time: 3:30 PM (Doors close then,
Refreshments at 3:15 PM)
Place: Engineering North, Room 415B
Title: Crystallization in Suspensions
of Hard Colloidal Spheres
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Oklahoma High Energy Physics Seminar
on Talk-Back Television:
Speaker: Dr. Kim Milton
University of Oklahoma
Date: Thursday, March 31
Time: 1:45 PM
Place: Classroom Building, Room 106
Title: The Dimensional Dependence
of the Casimir Effect
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Physics Colloquium:
Speaker: Dr. D.S. Kim
Oklahoma State University
Date: Thursday, March 31
Time: 3:30 PM
Place: PS 110
Title: Femtosecond Coherent Fields
in GaAs Quantum Wells
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Journal Club on Statistical Mechanics
and Condensed Matter Physics (Informal):
Speaker: Jacques H.H. Perk
Date: Friday, April 1
Time: 2:00 PM
Place: PS 147
Title: Constrained Systems,
Critical Exponent
Renormalization, etc.
(continued)
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Oklahoma State Physics Department
Seminars and Colloquia, April 4-8, 1994
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Oklahoma High Energy Physics Seminar
on Talk-Back Television:
Speaker: Dr. Jerry Guglielmo
University of Minnesota
Date: Thursday, April 7
Time: 1:45 PM
Place: Classroom Building, Room 106
Title: Production and Polarization
--- Magnetic Moment, Decay,
and Asymmetry of the
Omega Minus Hyperon
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Physics Colloquium:
Speaker: Dr. Joel Snow
Langston University
Date: Thursday, April 7
Time: 3:30 PM
Place: PS 110
Title: Measuring Beauty and Charm
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Journal Club on Statistical Mechanics
and Condensed Matter Physics (Informal):
Speaker: Qi Jiang
Southern Illinois University
Date: Friday, April 8
Time: 2:00 PM
Place: PS 147
Title: Simulation of Structure
Formation in an
Electrorheological Fluid
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Oklahoma State Physics Department
Seminars and Colloquia, April 11-16, 1994
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Oklahoma High Energy Physics Seminar
on Talk-Back Television:
Speaker: Dr. C. Hill
Fermilab
Date: Thursday, April 14
Time: 1:45 PM
Place: Classroom Building, Room 106
Title: Chiral Symmetry in
Heavy Quark Systems
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Physics Colloquium:
Speaker: Dr. W. Wilson
Rice University
Date: Thursday, April 14
Time: 4:00 PM (note unusual time!)
Place: PS 110
Title: Laser Assisted Metal Organic
Chemical Vapor-Deposition
Growth of Compound
Semiconductor Materials
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Journal Club on Statistical Mechanics
and Condensed Matter Physics (Informal):
Speaker: Dr. A.N. Oraevsky
OSU and P.N.Lebedev Physics Inst.
Date: Friday, April 15
Time: 2:00 PM
Place: PS 147
Title: Spontaneous Emission in a Cavity
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Special Physics Colloquium (North Central
Oklahoma Alliance of Physics Teachers):
Speaker: John Saxon
Norman, Oklahoma
Date: Saturday, April 16
Time: 11:00 AM
Place: NRC 106
Title: A Plan to Double Enrollment
in High School Physics
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Oklahoma State Physics Department
Seminars and Colloquia, April 18-23, 1994
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Oklahoma High Energy Physics Seminar
on Talk-Back Television:
Speaker: G. Kalbfleisch
University of Oklahoma
Date: Thursday, April 21
Time: 1:45 PM
Place: Classroom Building, Room 106
Title: Non-Standard Neutrinos?
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Journal Club on Statistical Mechanics
and Condensed Matter Physics (Informal):
Speaker: Mike Clark
Date: Thursday, April 21 (Unusual Day)
Time: 3:30 PM
Place: PS 147
Title: Molecular Dynamics and
Microscopic Reversibility
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Physics Colloquium:
(No colloquium on Thursday)
Speaker: Dr. Edward Teller
Lawrence Livermore Lab
and Hoover Institute, Stanford
Date: Friday, April 22
Time: 1:30 PM
Place: PS 453
Event: Meeting with faculty
Date: Friday, April 22
Time: 6:30 PM
Place: Stillwater Country Club
(by reservation only)
Event: Physics Awards Banquet
Title: Great Physicists
of the Early Days
Date: Saturday, April 23
Time: 1:30 PM
Place: PS 110
Event: Meeting with students
Date: Saturday, April 23
Time: 6:00 PM
Place: Noble Center 106
Title: Energy and Defense:
The Future of the World
(Public Lecture)
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Oklahoma State Physics Department
Seminars and Colloquia, April 25-29, 1994
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Oklahoma High Energy Physics Seminar
on Talk-Back Television:
Speaker: Dr. C. Marzban
University of Oklahoma
Date: Thursday, April 28
Time: 1:45 PM
Place: Classroom Building, Room 106
Title: Neural Nets in Vertex Detectors
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Physics Colloquium:
Speaker: Dr. Dave Golden
University of North Texas
Date: Thursday, April 28
Time: 3:30 PM
Place: PS 110
Title: Anti-Capture into the
Continuum in Electron
Collisional Ionization
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Journal Club on Statistical Mechanics
and Condensed Matter Physics (Informal):
Cancelled (last day before finals week)
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