Seminars and Colloquia, July through December, 2014


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Seminars and Colloquia, Typical Week:


Frontiers of Physics:

Date:Monday
Time:3:30 PM
Place:PS 355
Inquiries: xxx@okstate.edu

Oklahoma High Energy Physics Seminar on Talk-Back Television:

Date:Thursday
Time:1:30-3:00 PM
Place:106 B Studio Room, Classroom Building, OSU
& Nielsen Hall, Room 103, OU
Inquiries: kaladi.babu@okstate.edu or kao@nhn.ou.edu

Physics Colloquium:

Date:Thursday
Time:3:30-4:30 PM
Place:PS 101
Inquiries: s.nandi@okstate.edu or perk@okstate.edu

Journal Club on Statistical Mechanics and Condensed Matter Physics, and Optics (Informal):

Date:Friday (bi)weekly
Time:2:00 PM
Place:PS 147
Inquiries: perk@okstate.edu or girish.agarwal@okstate.edu

Oklahoma State Physics Department

Seminars and Colloquia, July 1-4, 2014


No talks scheduled


Oklahoma State Physics Department

Seminars and Colloquia, July 7-11, 2014


No talks scheduled


Oklahoma State Physics Department

Seminars and Colloquia, July 14-18, 2014


No talks scheduled


Oklahoma State Physics Department

Seminars and Colloquia, July 21-25, 2014


No talks scheduled


Oklahoma State Physics Department

Seminars and Colloquia, July 28-August 1, 2014


No talks scheduled


Oklahoma State Physics Department

Seminars and Colloquia, August 4-8, 2014


No talks scheduled


Oklahoma State Physics Department

Seminars and Colloquia, August 11-15, 2014


No talks scheduled


Oklahoma State Physics Department

Seminars and Colloquia, August 18-22, 2014


First week of classes

No colloquium scheduled.


Oklahoma State Physics Department

Seminars and Colloquia, August 25-29, 2014


Second week of classes.


OU/OSU Condensed Matter Physics Seminar:

Speaker:Dr. Liangliang (Paul) Huang
School of Chemical, Biological and Materials Engineering
University of Oklahoma
Date:Friday, August 29, 2014
Time:2:30 PM
Place:PS 148 (and room 103 Nielsen Hall, OU)
Title:Multi-Scale Modeling of Chemical Reaction: Examples in Chemical Engineering

Abstract:

Chemical reactions are often carried out on catalytic surfaces or in macro- and nanoporous materials, which the confinement effect can change the reaction pathway or enhance reaction rates and equilibrium yields. From the theoretical point of view, the study of confinement effect is a process correlated with adsorption, diffusion and chemical reactions, and thus requires multi- scale computational efforts.

In this seminar, I will discuss three computational calculation examples of chemical reactions: the dissociation of gas-phase hydrogen sulfide and ammonia by using graphene oxide (GO) and CuBTC metal-organic framework (MOF), and the behavior of water on or near the titanium dioxide (TiO2) surfaces. Results from ab initio density functional theory (DFT), classical molecular dynamics (MD), Grand Canonical Monte Carlo (GCMC) calculations and reactive force field (ReaxFF) method will be discussed. Corresponding experimental results will also be provided for each example.

Other related projects and future research directions on chemical reaction and interface engineering will be briefly discussed, including the surface functionalization of graphene oxide and its application in biomedical engineering, the study of nanofriction by a combination of atomic molecular dynamics simulations and atomic force microscope (AFM) experiments.

Keywords: reactive adsorption, chemical reaction, graphene oxide, metal-organic framework, titanium dioxide, reactive force field, surface functionalization, nanofriction, interface engineering, catalysis


Oklahoma State Physics Department

Seminars and Colloquia, September 1-5, 2014


Labor Day Holiday Monday September 1.


OU/OSU Condensed Matter Physics Seminar:

Speaker:Dr. Bin Wang
School of Chemical, Biological and Materials Engineering
University of Oklahoma
Date:Friday, September 5, 2014
Time:2:30 PM
Place:PS 148 (and room 103 Nielsen Hall, OU)
Title:Tunable Electronic and Optical Properties of Two-Dimensional Materials and Transition Metal Oxides

Abstract:

Tunable electronic and optical properties of nanomaterials are valuable for their applications in electronic and optical devices, molecular sensors, and catalysis. In this talk  I will discuss several case studies of two-dimensional (2D) materials and transition metal oxides, through which I would like to demonstrate how experiments and computational simulations could be combined to address various issues. In the first example, the structure, growth dynamics, and template effect of monolayer graphene and h-BN on metal surfaces will be discussed. Second, I will focus on 2D transition metal dichalcogenides such as MoS2. Particularly I will talk about the large exciton binding energy and tunable band structure and optical spectrum of MoS2 under tensile strain. In the third example, I will highlight the strong interplay between different degrees of freedom in vanadium dioxide, a phase change material, and discuss how to tailor the phase transition temperature by creating hybrid structures and electron injection.


Oklahoma State Physics Department

Seminars and Colloquia, September 8-12, 2014


Geology Seminar:

Speaker:Dr. Robert B. Finkelman
Department of Geosciences
University of Texas at Dallas
Date:Friday, September 12, 2014
Time:12:30 PM
Place:NRC 108
Title:Medical Geology: How the Natural Environment Gets Away with Murder (and Saves Lives, too)

OU/OSU Condensed Matter Physics Seminar:

Speaker:Dr. Jivtesh Garg
School of Aerospace and Mechanical Engineering
University of Oklahoma
Date:Friday, September 12, 2014
Time:2:30 PM
Place:PS 148 (and room 103 Nielsen Hall, OU)
Title:Higher Efficiency Thermoelectrics through Ab-initio and Monte Carlo Simulations of Phonon
and Electron Transport in Nanostructured Semiconductor Materials

Abstract:

Thermoelectrics convert temperature gradient into useful electric power. The energy conversion efficiency is directly proportional to electrical conductivity and square of Seebeck coefficient and inversely proportional to thermal conductivity. Different approaches to enhance thermoelectric efficiency focus on increasing Seebeck coefficient and electrical conductivity and decreasing thermal conductivity. In semiconductor materials heat is partly conducted by phonons and thermal conductivity can be engineered independent of the electrical conductivity. This talk will focus on the first-principles methods to predict phononic thermal transport in semiconductors based on deriving the second-order and third-order interatomic force constants from density-functional theory. Superlattice structures optimize different phonon scattering mechanisms and provide avenues to achieve ultra-low thermal conductivity beneficial for thermoelectrics. Finally their low thermal conductivity can be combined with an enhancement of Seebeck coefficient through the use of heterostructures to yield high thermoelectric efficiency. To this end Monte-Carlo simulations of electron transport in single-barrier heterostructures will be discussed.


Oklahoma State Physics Department

Seminars and Colloquia, September 15-19, 2014


Physics Colloquium:

Speaker:Dr. John Wisniewski
Homer L. Dodge Department of Physics & Astronomy
University of Oklahoma
Date:Thursday, September 18, 2014
Time:3:30 PM
Place:PS 110
Title:Diagnosing the SEEDS of Planet Formation

Abstract:

Circumstellar disks provide a useful astrophysical diagnostic of the formation and early evolution of exoplanets.  It is commonly believed that young protoplanetary disks serve as the birthplace of planets, while older debris disks can provide insight into the architecture of exoplanetary systems.  In this talk, I will discuss how one can use high contrast imaging techniques to spatially resolve nearby circumstellar disk systems, and how this imagery can be used to search for evidence of recently formed planetary bodies.  I will focus on results from the Strategic Exploration of Exoplanets and Disks with Subaru (SEEDS) project.

Note: The traditional student-speaker chat will begin in Physical Sciences Room 147 at 3:00 PM. All students are welcome! Refreshments will be served.


OU/OSU Condensed Matter Physics Seminar:

Speaker:Dr. Lucas K. Wagner
Department of Physics
University of Illinois at Urbana-Champaign
Date:Friday, September 19, 2014
Time:2:30 PM
Place:PS 148 (and room 103 Nielsen Hall, OU)
Title:Explicitly Simulating Electron Correlations in Realistic Models of Materials

Abstract:

Traditional electronic materials operate in the weakly interacting regime; it is a good approximation to assume that the electrons do not interact with one another in describing the behavior of the material. Part of the next generation of materials requires us to discard this approximation to enable new emergent behaviors such as unconventional superconductivity, colossal magnetoresistance, and ultrafast optical switching. However, full treatment of the many-body quantum problem is very challenging, with general purpose numerical algorithms scaling exponentially with system size.

I will discuss new applications of approximate quantum Monte Carlo techniques to ab-initio models of strongly correlated systems. Starting from fundamental constants and the positions of the nuclei, we calculate the collective motions of electrons and derive effective low energy models. We have found that the approximations can be controlled well enough to accurately predict experimental results and gain physical insight on challenging systems such as vanadium dioxide, graphene, and the cuprate parent materials of high temperature superconductors.


Oklahoma State Physics Department

Seminars and Colloquia, September 22-26, 2014


No colloquium scheduled, because of conflict with OSU football program.


Chemistry Seminar:

Speaker:Dr. Catherine J. Murphy
Peter C. and Gretchen Miller Markunus Professor of Chemistry
Department of Chemistry
University of Illinois at Urbana-Champaign
Date:Thursday, September 25, 2014
Time:3:30 PM
Place:PS 103
Title:Molecular Engineering of Gold Nanorod Surfaces

Abstract:

Gold nanorods have tunable plasmon resonances throughout the visible and near-infrared portions of the spectrum. These optical properties enable both fascinating science and fascinating applications in optics, biosensing, imaging agents, and photothermal therapeutics. In this talk I will discuss how we make and measure the molecules on the surface of the nanorods, and how molecular display impacts physicochemical properties of these nanomaterials “downstream.”

Note: Instead of refreshments at 3:00 pm, we would like to invite you to join us on the south lawn of PS1 for a tailgate gathering immediately following the seminar.


Oklahoma State Physics Department

Seminars and Colloquia, September 29-October 3, 2014


Physics Colloquium:

Speaker:Dr. Zhe-Yu Jeff Ou
Department of Physics
Indiana University–Purdue University Indianapolis (IUPUI)
Date:Thursday, October 2, 2014
Time:3:30 PM
Place:PS 110
Title:Interferometers with Non-traditional Beam Splitters

Abstract:

We will discuss a new type of interferometers that employ nonlinear devices as beam splitters. A specific scheme with parametric amplifiers, the so called SU(1,1) interferometer, is implemented and is compared with a traditional linear interferometer. A new paradigm for quantum interferometry is found that is different from the noise reduction mechanism in squeezed state interferometry. Furthermore, the nonlinear process allows the coupling of different types of waves and leads to hybrid interferometry involving different waves. A specific atom-light hybrid interferometer will be discussed.

Note: The traditional student-speaker chat will begin in Physical Sciences Room 147 at 3:00 PM. All students are welcome! Refreshments will be served.


OU/OSU Condensed Matter Physics Seminar:

Speaker:Dr. Louise C. Hirst
US Naval Research Laboratory, Washington, DC
Date:Friday, October 3, 2014
Time:2:30 PM
Place:PS 148 (and room 103 Nielsen Hall, OU)
Title:How to Build a Hot-Carrier Solar Cell: Materials Development and Device Design

Oklahoma State Physics Department

Seminars and Colloquia, October 6-10, 2014


Physics Colloquium:

Speaker:Dr. Gaurav Bahl
Department of Mechanical Science and Engineering
University of Illinois at Urbana-Champaign
Date:Thursday, October 9, 2014
Time:3:30 PM
Place:PS 110
Title:TBA

Abstract:

TBA

Note: The traditional student-speaker chat will begin in Physical Sciences Room 147 at 3:00 PM. All students are welcome! Refreshments will be served.


Oklahoma State Physics Department

Seminars and Colloquia, October 13-17, 2014



Oklahoma State Physics Department

Seminars and Colloquia, October 20-24, 2014


Students‘ Fall Break Friday, October 24.


Oklahoma State Physics Department

Seminars and Colloquia, October 27-31, 2014



Oklahoma State Physics Department

Seminars and Colloquia, November 3-7, 2014


OU/OSU Condensed Matter Physics Seminar:

Speaker:Dr. Salvador Barraza-Lopez
Department of Physics
University of Arkansas
Date:Friday, November 7, 2014
Time:2:30 PM
Place:PS 148 (and room 103 Nielsen Hall, OU)
Title:TBA

Oklahoma State Physics Department

Seminars and Colloquia, November 10-14, 2014


Joint Chemistry and Physics Colloquium:

Speaker:Dr. Ken A. Dill
Director, Laufer Center for Physical and Quantitative Biology
Louis & Beatrice Laufer Endowed Chair of Physical and Quantitative Biology
Distinguished Professor, Departments of Physics and Chemistry
Stony Brook University
Date:Thursday, November 13, 2014
Time:3:30 PM
Place:PS 110 ?
Title:TBA

OU/OSU Condensed Matter Physics Seminar:

Speaker:Dr. Rebecca Flint
Department of Physics & Astronomy
Iowa State Unversity
Date:Friday, November 14, 2014
Time:2:30 PM
Place:PS 148 (and room 103 Nielsen Hall, OU)
Title:TBA

Oklahoma State Physics Department

Seminars and Colloquia, November 17-21, 2014


Physics Colloquium:

Speaker:Dr. Wade C. Fisher
Department of Physics and Astronomy
Michigan State University
Date:Thursday, November 28, 2014
Time:3:30 PM
Place:PS 110
Title:TBA

Oklahoma State Physics Department

Seminars and Colloquia, November 24-28, 2014


Thanksgiving Break: No Wednesday classes, Thursday-Friday University Holiday.


Oklahoma State Physics Department

Seminars and Colloquia, December 1-5, 2014


Prefinals Week


Oklahoma State Physics Department

Seminars and Colloquia, December 8-12, 2014


Finals Week


Oklahoma State Physics Department

Seminars and Colloquia, December 15-19, 2014


No talks scheduled


Oklahoma State Physics Department

Seminars and Colloquia, December 22-26, 2014


No talks scheduled


Oklahoma State Physics Department

Seminars and Colloquia, December 29-31, 2014


No talks scheduled


Last Updated:

jhhp@jperk.phy.okstate.edu