| Jan. 16 |
1st week of classes: No seminar |
| Jan. 23 |
Yuxuan Lu
PAMS student
|
Reactive MD Simulation on the Formation of Amorphous Sub-nano Alumina Layer |
Moudip Nandi
PAMS student |
Synthesis and Characterization of Barium Titanate and Carbon-based Core-Shell Nano Particles |
| Jan. 30 |
Abdullah Shafe
PAMS student |
Magnetic Properties of NiO Based Magnetic Heterostructured Nano Crystals (MHNCs) |
Joy Roy
PAMS student |
Fabrication of CFO@C Core/Shell Nanoparticles by Laser Ablation |
| Feb. 6 |
Dr. Mallory Molina
Montana State University |
Resolving Black Hole and Star-Formation Activity in Nearby Galaxies |
Dr. Molina will also meet with students 2:30-3:30 pm in Kemper Hall conference room 101 for informal discussions.
Dr. Molina will also give another talk the following day, see below. |
| Abstract: Star formation and accreting black holes fundamentally change how a galaxy evolves with time. However, to fully explain this evolution, we must understand how small-scale changes affect global properties. My talk will focus on the spatially resolved sources that power observed emission in other nearby galaxies, and the dust that obscures it. I will present my work with Hubble Space Telescope data to study the local environment around black holes. I find that small-scale shocks significantly contribute to the large-scale emission. I will then discuss my work on the obscuration of light from star forming regions. I compare my results to that from the integrated galaxy light, and find important differences and relationships between the way dust affects gas and starlight on the two scales. |
Feb. 7
(Fri.) |
Dr. Mallory Molina
Montana State University |
Towards a More Inclusive Astronomy: Building Community for All in Academia |
| This talk is at 10:45 – 11:45 am in Kemper 102. |
| Description: Towards a More Inclusive Astronomy (TaMIA) was created to provide a safe space within physics and astronomy departments to discuss equity and inclusivity. TaMIA meetings encourage attendees to understand the lived experiences of people with marginalized identities in science, and become better allies. In this session I will discuss the history and goals of TaMIA, how we structure our meetings to provide support to marginalized people, and demonstrate a group activity similar to those held in TaMIA meetings. |
| Feb. 13 |
Christopher Robledo
PAMS student |
Heterostructure of 2D Materials |
Shahidul Asif
PAMS student |
Study of ZnO for Thin Film Transistor |
| Feb. 20 |
Dr. Bharat Ratra
Kansas State University |
The Accelerating Expanding Universe: Dark Matter, Dark Energy, and Einstein's Cosmological Constant, or Why Jim Peebles was Awarded Half of the 2019 Physics Nobel Prize |
This seminar is a NON-TECHNICAL PUBLIC lecture and takes place in Meyer Library 101, regular time 4-5 pm.
Dr. Ratra will also meet informally with students 2:30-3:30 pm in Kemper Hall conference room. |
| Abstract: Dark energy is the leading candidate for the mechanism that is responsible for causing the cosmological expansion to accelerate. In this non-technical talk, Bharat Ratra will describe the astronomical data which persuade cosmologists that (as yet not directly detected) dark energy and dark matter are by far the main components of the energy budget of the universe at the present time. He will review how these observations have led to the development of a quantitative "standard" model of cosmology that describes the evolution of the universe from an early epoch of inflation to the complex hierarchy of structure seen today. He will also discuss the basic physics, and the history of ideas (many developed by Jim Peebles), on which this model is based. |
| Feb. 27 |
Dr. Wouter Montfrooij
University of Missouri, Columbia |
Does Spontaneous Fragmentation of a Magnetic Lattice Lead to Heavy Fermion Behavior? |
Abstract: We discuss how macroscopically uniform systems housing magnetic ions, the so-called Kondo lattices, can spontaneously fragment into lattices populated with magnetic clusters upon cooling. We show evidence for this behavior in a chemically substituted compound and demonstrate how these magnetic clusters dominate the low temperature response of the system, both in transport measurements as well as to microscopic probes such as neutron scattering.
We argue that this spontaneous fragmentation should not be limited to chemically substituted systems but should be prevalent in stoichiometric systems as well, especially in systems that are close to a quantum critical point. As such, this fragmentation could well provide the explanation behind the puzzling critical behavior observed in quantum critical systems. |
| Mar. 5 |
Dr. Ariful Haque
North Carolina State University |
Fabrication of Q-carbon and Diamond Films by Ultrafast Laser Processing and Deposition for Electron Field Emission and Electrocatalysis Applications |
Dr. Haque is an alumnus of PAMS; he obtained his MSc in Materials Science in 2015. He just finished his PhD at NC State and has accepted a job at Intel.
He will meet with students 2:30-3:30 pm in Kemper conference room, to discuss career paths, PhD process, etc. |
Abstract: My research interests are in the area of fabrication, characterization, and processing of carbon-based semiconductor thin films and nanostructures. I use fundamentally non-equilibrium pulsed laser deposition and pulsed laser annealing processes for the formation of novel quenched solid phase of carbon (Q-carbon) at room temperature and atmospheric pressure for electron field-emission device applications. The devices have shown excellent electric field enhancement, very low turn-on electric fields, and high emission current densities over long periods with tremendous stability even at high temperatures. In this seminar, I will discuss the direct conversion of crystalline carbon nanotube (CNT) and amorphous carbon structures into nanostructured diamond by nanosecond pulsed laser annealing. The laser-irradiated CNT structures with nanodiamond seeds were used to grow large diamond crystals and hollow conductive diamond tubes in hot filament chemical vapor deposition.
I will also discuss the wafer-scale diamond fabrication on sapphire. Synthesis of diamond thin film on optically transparent substrates is quite challenging due to large thermal mismatch, low nucleation density, and absence of a carbide glue layer. Q-carbon layer on sapphire addresses these issues by providing the nucleation sites and it also negates the thermal mismatch between the diamond film and the sapphire substrate. The results from these projects and the ongoing investigations are intended to uncover fundamental insights on the synthesis, structural-property correlation, and application-related issues related to carbon-based electronics.
Finally, a short outlook will be given on my research journey at NC State University. |
| Mar. 19 |
Spring break: No seminar |
| Mar. 26 |
Extended Spring break: No seminar |
| Apr. 2 |
Sinjan Majumder
PAMS student
|
TBA |
Nadib Akram
PAMS student |
TBA |
| Apr. 9 |
Spring holiday: No seminar |
| Apr. 16 |
Tauhidu Islam
PAMS student |
TBA |
Sudha Krishnan
PAMS student |
TBA |
| Apr. 23 |
TBD |
|
| Apr. 30 |
TBD |
|
| May 7 |
Abiodun Odusanya
PAMS student |
TBA |
David Magness
PAMS student |
TBA |
| May. 14 |
Finals week: No seminar |
