Absolute band alignment at semiconductor-water interfaces using explicit and implicit descriptions for liquid water (open access)

Absolute band alignment at semiconductor-water interfaces using explicit and implicit descriptions for liquid water

Article presents a rigorous and systematic study of the band alignment of semiconductors in aqueous solutions by contrasting a range of hybrid explicit/implicit models against explicit atomistic simulations based on density-functional theory.
Date: October 11, 2019
Creator: Hörmann, Nicolas; Guo, Zhendong; Ambrosio, Francesco; Andreussi, Oliviero; Pasquarello, Alfredo & Marzari, Nicola
System: The UNT Digital Library
Absorption and emission modulation in a MoS2–GaN (0001) heterostructure by interface phonon–exciton coupling (open access)

Absorption and emission modulation in a MoS2–GaN (0001) heterostructure by interface phonon–exciton coupling

Article reporting the change in the transient absorption characteristics of monolayer MoS2 and the modified PL emission characteristics in a monolayer MoS2–GaN (0001) heterostructure due to the coupling of carriers with the phonon modes and the energy exchange at the interface. The results demonstrate the relevance of interface coupling between the semiconductors for the development of optical and electronic applications.
Date: September 26, 2019
Creator: Poudel, Yuba; Sławińska, Jagoda; Gopal, Priya; Seetharaman, Sairaman; Hennighausen, Zachariah; Kar, Swastik et al.
System: The UNT Digital Library
AFLOW-QHA3P: Robust and automated method to compute thermodynamic properties of solids (open access)

AFLOW-QHA3P: Robust and automated method to compute thermodynamic properties of solids

Article introducing the quasiharmonic approximation three-phonon method to calculate the thermodynamic properties of both nonmetallic and metallic compounds. This study demonstrates that QHA3P is an ideal framework for the high-throughput prediction of finite-temperature material properties, combining the accuracy of QHA with the computational efficiency of SC-QHA.
Date: July 8, 2019
Creator: Nath, Pinku; Usanmaz, Demet; Hicks, David; Oses, Corey; Fornari, Marco; Buongiorno Nardelli, Marco et al.
System: The UNT Digital Library
All-acoustic signal modulation and logic operation via defect induced cavity effects in phononic crystal coupled-resonator acoustic waveguides (open access)

All-acoustic signal modulation and logic operation via defect induced cavity effects in phononic crystal coupled-resonator acoustic waveguides

Article describes experiment where a coupled resonant acoustic waveguide (CRAW) in a phononic crystal (PnC) was engineered to manipulate the propagation of ultrasonic waves within a conventional phononic bandgap for wavelength division multiplexing.
Date: November 6, 2019
Creator: Reyes, Delfino; Walker, Ezekiel; Zubov, Yurii; Heo, Hyeonu; Krokhin, Arkadii A. & Neogi, Arup
System: The UNT Digital Library
Amplification of photoacoustic effect in bimodal polymer particles by self-quenching of indocyanine green (open access)

Amplification of photoacoustic effect in bimodal polymer particles by self-quenching of indocyanine green

This article presents a new type of bimodal contrast agent that is based on the self-quenching of indocyanine green (ICG) encapsulated in a biocompatible and biodegradable polymer shell.
Date: August 23, 2019
Creator: Mokrousov, Maksim D.; Novoselova, Marina V.; Nolan, Jackie; Harrington, Walter; Rudakovskaya, Polina; Bratashov, Daniil N. et al.
System: The UNT Digital Library

Artificially structured boundary plasma trap

This article presents a computer simulation of single-species non-neutral plasma confinement using an artificially structured boundary. The results support the prospect of developing plasma space-charge based confinement, with an unmagnetized plasma of one species of charged particles confined by an electric field produced by an edge-confined plasma of a second species of charged particles.
Date: September 20, 2019
Creator: Hedlof, R. M. & Ordonez, Carlos A.
System: The UNT Digital Library
Classical trajectory Monte Carlo simulation of plasma fueling using magnetic plasma expulsion (open access)

Classical trajectory Monte Carlo simulation of plasma fueling using magnetic plasma expulsion

Article describes a study exploring the possibility of fueling a magnetically confined plasma using particle sources located inside of the plasma.
Date: July 11, 2019
Creator: Martinez, Armando & Ordonez, Carlos A.
System: The UNT Digital Library

Concentric cone antihydrogen gravity experiment

This article describes a proposed antihydrogen gravity experiment that could be conducted at the CERN Antiproton Decelerator facility to determine the directionality of the acceleration of antihydrogen in earth’s gravitational field.
Date: October 2, 2019
Creator: Patel, S. S.; Sun, S. R. & Ordonez, Carlos A.
System: The UNT Digital Library
Coordination corrected ab initio formation enthalpies (open access)

Coordination corrected ab initio formation enthalpies

Article proposes the “coordination corrected enthalpies” method (CCE), based on the number of nearest neighbor cation–anion bonds, and also capable of correcting relative stability of polymorphs.
Date: May 15, 2019
Creator: Friedrich, Rico; Usanmaz, Demet; Oses, Corey; Supka, Andrew; Fornari, Marco; Buongiorno Nardelli, Marco et al.
System: The UNT Digital Library
Deep Minima and Vortices for Positronium Formation in Low-Energy Positron-Hydrogen Collisions (open access)

Deep Minima and Vortices for Positronium Formation in Low-Energy Positron-Hydrogen Collisions

Article using the two-channel Kohn inverse and Kohn variational methods to investigate ground-state positronium (Ps) formation in positron-hydrogen collisions in the Ore gap. This is the Accepted Manuscript Version of the article.
Date: September 30, 2019
Creator: Alrowaily, Albandari W.; Quintanilla, Sandra J. & Van Reeth, P.
System: The UNT Digital Library
Dual-Band High Efficiency Terahertz Meta-Devices Based on Reflective Geometric Metasurfaces (open access)

Dual-Band High Efficiency Terahertz Meta-Devices Based on Reflective Geometric Metasurfaces

Article proposing a novel reflective building block (unit cell) to work at two arbitrary terahertz frequency bands with independent phase control at each band.
Date: April 18, 2019
Creator: Lin, Yuankun; Wang, Tailei; Xie, Rensheng; Zhu, Shouzheng; Gao, Jianjun; Xin, Mingbo et al.
System: The UNT Digital Library
Edge-plasmon assisted electro-optical modulator (open access)

Edge-plasmon assisted electro-optical modulator

Article demonstrates an efficient electro-optical modulation by using an edge-plasmon mode specific for the hybrid plasmonic waveguide.
Date: November 26, 2019
Creator: Drachev, Vladimir P.; Pshenichnyuk, Ivan A.; Nazarikov, Gleb I.; Kosolobov, Sergey S. & Maimistov, Andrei I.
System: The UNT Digital Library
Electrodynamics of superlattices with ultra-thin metal layers: quantum Landau damping and band gaps with nonzero density of states (open access)

Electrodynamics of superlattices with ultra-thin metal layers: quantum Landau damping and band gaps with nonzero density of states

This article develops a theory of electromagnetic transmission through dielectric-metal superlattices with ultra-thin metal films, in which electron motion in the direction perpendicular to the metal surfaces is quantized.
Date: October 16, 2018
Creator: Castillo-López, S. G.; Krokhin, Arkadii A.; Makarov, N. M. & Pérez-Rodríguez, F.
System: The UNT Digital Library
Electrostatic equilibria of non-neutral plasmas confined in a Penning trap with axially varying magnetic field (open access)

Electrostatic equilibria of non-neutral plasmas confined in a Penning trap with axially varying magnetic field

This article describes a procedure for computing the electrostatic equilibria of non-neutral plasmas in a Penning trap with a nonuniform magnetic field by solving Poisson's equation using an iterative method. Plasma equilibria in a model Penning trap with high and low field regions are computed. The plasma is assumed to follow the Boltzmann density distribution along magnetic field lines.
Date: May 21, 2019
Creator: Lane, Ryan A. & Ordonez, Carlos A.
System: The UNT Digital Library
Fe/GeTe(111) heterostructures as an avenue towards spintronics based on ferroelectric Rashba semiconductors (open access)

Fe/GeTe(111) heterostructures as an avenue towards spintronics based on ferroelectric Rashba semiconductors

Article investigating the electronic structure of Fe/GeTe(111), a prototypical ferromagnetic/Rashba-ferroelectric interface, by performing density functional theory and Green's functions calculations complemented by x-ray photoemission spectroscopy.
Date: February 19, 2019
Creator: Sławińska, Jagoda; Di Sante, Domenico; Varotto, Sara; Rinaldi, Christian & Picozzi, Silvia
System: The UNT Digital Library
Formation and characterization of embedded Fe3Si binary structures in Si (open access)

Formation and characterization of embedded Fe3Si binary structures in Si

Article studying chemical and electronic properties of ion beam synthesized Fe-Si binary structures using X-ray photoelectron spectroscopy binding energy analysis.
Date: May 16, 2019
Creator: Lakshantha, Wickramaarachchige J.; McDaniel, Floyd Del. (Floyd Delbert), 1942- & Rout, Bibhudutta
System: The UNT Digital Library
Giant spin Hall effect in two-dimensional monochalcogenides (open access)

Giant spin Hall effect in two-dimensional monochalcogenides

This article, using calculations from first principles, reveals for the first time giant intrinsic spin Hall conductivities (SHC) in these materials. In particular, the article shows that the SHC resonances can be easily tuned by combination of strain and doping and, in some cases, strain can be used to induce semiconductor to metal transition that makes a giant spin Hall effect possible even in absence of doping.
Date: October 30, 2018
Creator: Sławińska, Jagoda; Cerasoli, Frank T.; Wang, Haihang; Postorino, Sara; Supka, Andrew; Curtarolo, Stefano et al.
System: The UNT Digital Library
Grand canonical simulations of electrochemical interfaces in implicit solvation models (open access)

Grand canonical simulations of electrochemical interfaces in implicit solvation models

Article discussing grand canonical simulations based on density-functional theory to study the thermodynamic properties of electrochemical interfaces of metallic electrodes in aqueous environments.
Date: August 31, 2018
Creator: Hörmann, Nicolas; Andreussi, Oliviero & Marzari, Nicola
System: The UNT Digital Library
Influence of coherent population trapping on Raman scattering (open access)

Influence of coherent population trapping on Raman scattering

Article considering the Raman scattering in molecular media. Applying two laser fields in a two-photon resonance with vibrational transition, the authors study the role of rotational levels for excitation of vibrational coherence. It is shown that the molecular vibrational coherence strongly depends on the effect of coherent population trapping for rotational levels. The obtained results are important for applications of Raman spectroscopy to molecular detection in engineering, chemical, and biological applications.
Date: August 8, 2019
Creator: Singh, Pooja; Rostovtsev, Yuri V.; Patnaik, Anil K.; Roy, Sukesh & Gord, James R.
System: The UNT Digital Library
Interface chemistry and leakage current mechanism of HfGdON/Ge gate stack modulated by ALD-driven interlayer (open access)

Interface chemistry and leakage current mechanism of HfGdON/Ge gate stack modulated by ALD-driven interlayer

Article describes an experiment in which a Ge metal-oxide-semiconductor (MOS) capacitor based on HfGdON/Ge gate stacks with an ALD-driven passivation layer was fabricated, and compares it's interfacial and electrical properties with those of its counterparts that have not undergone passivation treatment.
Date: October 21, 2019
Creator: He, Gang; Wang, Die; Ma, Rui; Liu, Mao & Cui, Jingbiao
System: The UNT Digital Library
Label-free characterization of white blood cells using fluorescence lifetime imaging and flow-cytometry: molecular heterogeneity and erythrophagocytosis [Invited] (open access)

Label-free characterization of white blood cells using fluorescence lifetime imaging and flow-cytometry: molecular heterogeneity and erythrophagocytosis [Invited]

Article reporting the results of blood cell characterization using label-free fluorescence imaging techniques and flow-cytometry. Autofluorescence parameters of different cell types – white blood cells, red blood cells, erythrophagocytic cells – are assessed and analyzed in terms of molecular heterogeneity and possibilities of differentiation between different cell types in vitro and in vivo.
Date: July 29, 2019
Creator: Drachev, Vladimir P.; Yakimov, Boris P.; Gogoleva, Maria A.; Semenov, Alexey N.; Rodionov, Sergey A.; Novoselova, Marina V. et al.
System: The UNT Digital Library
Lattice quantum magnetometry (open access)

Lattice quantum magnetometry

Article presenting the idea of lattice quantum magnetometry, i.e., quantum sensing of magnetic fields by a charged (spinless) particle placed on a finite two-dimensional lattice.
Date: June 24, 2019
Creator: Razzoli, Luca; Ghirardi, Luca; Siloi, Ilaria; Bordone, Paolo & Paris, Matteo G. A.
System: The UNT Digital Library
Mechanical Properties of Chemically Modified Clay (open access)

Mechanical Properties of Chemically Modified Clay

Article uses first principles methods to compare the mechanical properties of lizardite Mg3(Si2O5)(OH)4, a polymorph of serpentine family, with the new compounds derived by substituting Mg ions with isovalent elements from different chemical groups.
Date: September 23, 2019
Creator: Gusmão, M. S.; Gopal, Priya; Siloi, Ilaria; Curtarolo, Stefano; Fornari, Marco & Buongiorno Nardelli, Marco
System: The UNT Digital Library
New mechanism of plasmons specific for spin-polarized nanoparticles (open access)

New mechanism of plasmons specific for spin-polarized nanoparticles

This article experimentally shows that Co nanoparticles with a single-domain crystal structure support a plasmon resonance at approximately 280 nm with better quality than gold nanoparticle resonance in the visible. The magnetic nature of these nanoparticles suggests a new type of these plasmons.
Date: March 27, 2018
Creator: Bhatta, Hari L.; Aliev, Abil E. & Drachev, Vladimir P.
System: The UNT Digital Library