Physics and Astronomy
Recent Submissions
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Heavy fermion quantum criticality at dilute carrier limit in CeNi2−δ(As1−xPx)2
(2019)We study the quantum phase transitions in the nickel pnctides, CeNi2−δ(As1−xPx)2 (δ ≈ 0.07–0.22) polycrystalline samples. This series displays the distinct heavy fermion behavior in the rarely studied parameter regime of ... -
Tunneling noise and defects in exfoliated hexagonal boron nitride
(2019)Hexagonal boron nitride (hBN) has become a mainstay as an insulating barrier in stackable nanoelectronics because of its large bandgap and chemical stability. At mono- and bilayer thicknesses, hBN can function as a tunnel ... -
Phase of confined electroweak force in the early Universe
(2019)We consider a modified cosmological history in which the presence of beyond-the-Standard-Model physics causes the weak gauge sector, SU(2)L, to confine before it is Higgsed. Under the assumption of chiral symmetry breaking, ... -
High‐Frequency Wave Generation in Magnetotail Reconnection: Linear Dispersion Analysis
(2019)Plasma and wave measurements from the NASA Magnetospheric Multiscale mission are presented for magnetotail reconnection events on 3 July and 11 July 2017. Linear dispersion analyses were performed using distribution functions ... -
Science and applications of wafer-scale crystalline carbon nanotube films prepared through controlled vacuum filtration
(2019)Carbon nanotubes (CNTs) make an ideal one-dimensional (1D) material platform for the exploration of novel physical phenomena under extremely strong quantum confinement. The 1D character of electrons, phonons and excitons ... -
Parametric Excitation of a Bose-Einstein Condensate: From Faraday Waves to Granulation
(2019)We explore, both experimentally and theoretically, the response of an elongated Bose-Einstein condensate to modulated interactions. We identify two distinct regimes differing in modulation frequency and modulation strength. ... -
Cosmological dynamics of Higgs potential fine tuning
(2019)The Higgs potential appears to be fine-tuned, hence very sensitive to values of other scalar fields that couple to the Higgs. We show that this feature can lead to a new epoch in the early Universe featuring violent dynamics ... -
Magnesium controls aptamer-expression platform switching in the SAM-I riboswitch
(2019)Investigations of most riboswitches remain confined to the ligand-binding aptamer domain. However, during the riboswitch mediated transcription regulation process, the aptamer domain and the expression platform compete for ... -
Computational Modeling of the Crosstalk Between Macrophage Polarization and Tumor Cell Plasticity in the Tumor Microenvironment
(2019)Tumor microenvironments contain multiple cell types interacting among one another via different signaling pathways. Furthermore, both cancer cells and different immune cells can display phenotypic plasticity in response ... -
Metal-organic frameworks tailor the properties of aluminum nanocrystals
(2019)Metal-organic frameworks (MOFs) and metal nanoparticles are two classes of materials that have received considerable recent attention, each for controlling chemical reactivities, albeit in very different ways. Here, we ... -
High-K dielectric sulfur-selenium alloys
(2019)Upcoming advancements in flexible technology require mechanically compliant dielectric materials. Current dielectrics have either high dielectric constant, K (e.g., metal oxides) or good flexibility (e.g., polymers). Here, ... -
Design of organic structure directing agents for polymorph A zeolite beta
(2019)Zeolite beta is a crystalline material with layer-type faulting. The two end members with perfect crystalline order are beta A and beta B. While zeolite beta in faulted form is a widely used industrial catalyst, additional ... -
Direct visualization of coexisting channels of interaction in CeSb
(2019)Our understanding of correlated electron systems is vexed by the complexity of their interactions. Heavy fermion compounds are archetypal examples of this physics, leading to exotic properties that weave magnetism, ... -
Structural and Dynamical Order of a Disordered Protein: Molecular Insights into Conformational Switching of PAGE4 at the Systems Level
(2019)Folded proteins show a high degree of structural order and undergo (fairly constrained) collective motions related to their functions. On the other hand, intrinsically disordered proteins (IDPs), while lacking a well-defined ... -
Machine Learning of Coarse-Grained Molecular Dynamics Force Fields
(2019)Atomistic or ab initio molecular dynamics simulations are widely used to predict thermodynamics and kinetics and relate them to molecular structure. A common approach to go beyond the time- and length-scales accessible ... -
Transforming diatomaceous earth into sensing devices by surface modification with gold nanoparticles
(2019)Diatomaceous earth, or diatomite, is produced through the accumulation of diatom (Bacillariophyceae) skeletons (i.e. cell walls called frustules) made of amorphous silica. The porous, highly symmetrical structure and ... -
Optimization for factorized quantities in perturbative QCD
(2019)Perturbative calculations of factorized physical quantities, such as moments of structure functions, suffer from renormalization- and factorization-scheme dependence. The application of the principle of minimal sensitivity ... -
Machine-learning approach to the design of OSDAs for zeolite beta
(2019)We report a machine-learning strategy for design of organic structure directing agents (OSDAs) for zeolite beta. We use machine learning to replace a computationally expensive molecular dynamics evaluation of the stabilization ... -
Modular epitope binding predicts influenza quasispecies dominance and vaccine effectiveness: Application to 2018/19 season
(2019)The modular binding sites on the influenza A(H3N2) hemagglutinin protein are under significant pressure to acquire mutations in order to evade human antibody recognition. Analysis of these hemagglutinin epitopes in the ... -
Quantitative analysis of gas phase molecular constituents using frequency-modulated rotational spectroscopy
(2019)Rotational spectroscopy has been used for decades for virtually unambiguous identification of gas phase molecular species, but it has rarely been used for the quantitative analysis of molecular concentrations. Challenges ...
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