Presentations about physics concepts and careers, and how to apply for and succeed in STEM majors
A system for measuring Intensity Modulated Photovoltage Spectroscopy (IMVS) data on photoelectrodes was built utilizing a standard laboratory lock-in amplifier. IMVS measurement was performed on TiO2 thin film photoanodes under UV illumination to determine recombination time for electrons and holes, and charge transfer efficiency at the photoelectrode/electrolyte interface. Results from the...
CrSBr is a new 2D magnetic material that has received enormous research interest recently. The material shows exceptional properties including air stability compared with other highly studied 2D magnets. Recent findings of this material have shown reversible strain-induced magnetic phase transitions, strong spin-orbit (SOC), and magneto-electronic coupling (MEC) effects.
In our work, we...
I present AI-SNIPS (AI Support for Network Intelligence-based Pharmaceutical Security), a platform that enables stakeholder decision-making, secure data sharing, and interdisciplinary research in the fight against Illicit, Substandard, and Falsified Medical Products (ISFMP). AI-SNIPS takes as input cases: a case consists of one or more URLs suspected of ISFMP activity. Cases can be...
Complex networks represent the relationships between interacting objects in a wide range of contexts, where nodes represent the interacting entities and edges represent interactions between them. In a directed signed network, the interactions can be positive (+1) or negative (-1), with the state of a node dictated by the state of its upstream neighbors. Biological regulatory networks are an...
In an effort to better understand thermal behavior and particle yields in p-p collisions we recast the problem using the language of quantum information. In the last 50 years physicists have used the parton model, very successfully, to describe particle collisions. In the parton model the proton is put into a high momentum frame in which constituents are viewed as quasi-free. However, quantum...
A bipartite system composed by an inertial observer (Alice) and an accelerated observer (Charlie) has been used in previous studies to show a connection between entanglement degradation and the Unruh effect. The degradation in entanglement between two modes of a non-interacting scalar field is attributed to the relative acceleration between the observers. In this work, we analyze the influence...
At temperatures below 250K, 1T’ MoTe$_2$ undergoes a first-order structural phase transition (SPT) to a non-centrosymmetric orthorhombic T$_d$ phase, marked by the appearance of Weyl points protected by broken inversion symmetry. Despite the similar structures of these two phases and a small energy barrier between them, distortions are evident at both macroscopic and atomic scales. This study...
Tania Ghosh 1,2, R.K.P. Zia 1,3, and Kevin E Bassler 1,2
1Department of Physics, University of Houston, Houston, Texas
2Texas Center for Superconductivity, University of Houston, Houston, Texas
3Department of Physics, Virginia Tech, Blacksburg, VA
Arguably the most fundamental problem in Network Science is finding structure within a complex network. One approach is to partition the...
Diffusive behavior is normally governed by the Central Limit Theorem (CLT), which states that the displacement $x(t)$ in the limit of large time $t$ has a Gaussian distribution with a width that increases as $t^{1/2}$. However, diffusive behavior that differs from the CLT is found in a wide array of experimental systems.
In many cases, the dynamics in these systems can be modeled with...
Recent experiments have seen surface superconductivity in Weyl semimetals, which raises the question of whether Fermi arcs can support superconductivity without any proximity effect from the bulk. This question is of further interest as the 2D surface is lower in dimensionality but has a finite density of states. In contrast, the 3D bulk is higher in dimensionality, but the density of states...
Atoms are held by the electromagnetic force between electrons and protons while a proton itself is composed of quarks bounded together with strong force or gluon exchange. To understand the nature of strong force one way is to smash the protons or lead nuclei (Pb) in high kinematic energy to reach a certain penetration depth to probe that length scale. In ALICE the energy is in order of a few...
Understanding light-semiconductor interaction is critical for the development of absorbers for efficient solar energy to electrical or chemical energy (fuel) conversion. Numerical simulation methods are often used to support experimental results and explain various optical phenomena in materials. The finite Difference Time Domain (FDTD) method has emerged as a tool for simulating and modeling...
In heavy-ion collisions at relativistic energies that Large Hadron Collider (LHC) achieves, a hot and dense medium called quark-gluon plasma (QGP) is created. Intriguingly, the collective motion of produced particles forms an almond shape, that is thought to be the signature of QGP formation. Colliding Xe-Xe nuclei in ALICE experiment at the LHC we can determine the initial state of the...
During a stellar core collapse, a large flux of neutrinos (1-100 MeV) is produced, escaping the core before any light can. If detected, these neutrinos can play a crucial role in providing both preliminary evidence of a stellar collapse, and an understanding of the mechanisms behind it.
The SuperNova Early Warning System 2.0 (SNEWS 2.0) is a worldwide network of neutrino detectors whose...
When a source of sound waves is active near the ocean surface, sound waves travel through the water and beneath the seafloor into the earth. The waves reflect from impedance changes in the earth and return to the ocean surface where sound measurements are recorded to then be processed and analyzed. From this study, a “picture” of the subsurface can be obtained that includes details such as...
The charge density wave (CDW) is a condensate known to carry electric current en masse, but collective CDW transport remains poorly understood at the microscopic level. Its quantum nature is clearly revealed by oscillations of period $h/2e$ in CDW conductance vs. magnetic flux, sometimes accompanied by telegraph-like switching, in $TaS3$ rings above 77 K. Here we show evidence for quantum time...
The recent discovery of ferromagnetism (FM) in two dimensional (2D) van der Waals (vdW) materials down to the monolayer has led, 2D vdW chromium trihalides CrX$_{3}$ (X=Cl,Br and I) to gain recent research attraction because of their interesting electronic and magnetic properties. In the monolayer, all CrX$_{3}$ display in-plane FM order. The bilayer of CrX$_{3}$ becomes antiferromagnetic...
The Deep Underground Neutrino Experiment (DUNE) is a next generation long-baseline neutrino oscillation experiment. DUNE is aiming to make groundbreaking discoveries, some of which are characterization of neutrino oscillations, search for nucleon decay, observation of supernovae neutrino bursts. DUNE will employ two detectors to measure neutrino oscillations over a long baseline, a near...
The world is seeking for the appropriate and efficient mixing technologies due to current approaches exhibit poor mixing performances and it requires a long operation time in mixing. In this project, our goal is to introduce a disruptive mixing technology that is rapid and cost-effective than current available mixing technologies.
Our proposed naval mixing method is mainly based on...
