Physics and Astronomy
Recent Submissions
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Self-resonance after inflation: Oscillons, transients, and radiation domination
(2018)Homogeneous oscillations of the inflaton after inflation can be unstable to small spatial perturbations even without coupling to other fields. We show that for inflaton potentials ∝|ϕ|2n near |ϕ|=0 and flatter beyond ... -
Simultaneous measurements of microwave photoresistance and cyclotron reflection in the multiphoton regime
(2018)We simultaneously measure photoresistance with electrical transport and coupled plasmon-cyclotron resonance using microwave reflection spectroscopy in high-mobility GaAs/AlGaAs quantum wells under a perpendicular magnetic ... -
Magnetooptics of Exciton Rydberg States in a Monolayer Semiconductor
(2018)We report 65 T magnetoabsorption spectroscopy of exciton Rydberg states in the archetypal monolayer semiconductor WSe2. The strongly field-dependent and distinct energy shifts of the 2s, 3s, and 4s excited neutral excitons ... -
Carbon nanotube woven textile photodetector
(2018)The increasing interest in mobile and wearable technology demands the enhancement of functionality of clothing through incorporation of sophisticated architectures of multifunctional materials. Flexible electronic and ... -
CO and Dust Properties in the TW Hya Disk from High-resolution ALMA Observations
(2018)We analyze high angular resolution ALMA observations of the TW Hya disk to place constraints on the CO and dust properties. We present new, sensitive observations of the 12CO J = 3 − 2 line at a spatial resolution of 8 au ... -
Unified spin model for magnetic excitations in iron chalcogenides
(2017)Recent inelastic neutron scattering (INS) measurements on FeSe and Fe(Te1−xSex) have sparked intense debate over the nature of the ground state in these materials. Here we propose an effective bilinear-biquadratic spin ... -
Correlation-driven metal-insulator transition in proximity to an iron-based superconductor
(2017)We report the direct spectroscopic observation of a metal to correlated-insulator transition in the family of iron-based superconducting materials. By means of optical spectroscopy we demonstrate that the excitation spectrum ... -
Temperature and polarization dependence of low-energy magnetic fluctuations in nearly optimally doped NaFe0.9785Co0.0215As
(2017)We use unpolarized and polarized neutron scattering to study the temperature and polarization dependence of low-energy magnetic fluctuations in nearly optimally doped NaFe0.9785Co0.0215As, with coexisting superconductivi ... -
Spin excitation anisotropy in the optimally isovalent-doped superconductor BaFe2(As0.7P0.3)2
(2017)We use neutron polarization analysis to study spin excitation anisotropy in the optimally isovalent-doped superconductor BaFe2(As0.7P0.3)2 (Tc=30 K). Different from optimally hole- and electron-doped BaFe2As2, where there ... -
De novo prediction of human chromosome structures: Epigenetic marking patterns encode genome architecture
(2017)Inside the cell nucleus, genomes fold into organized structures that are characteristic of cell type. Here, we show that this chromatin architecture can be predicted de novo using epigenetic data derived from chromatin ... -
Charged iodide in chains behind the highly efficient iodine doping in carbon nanotubes
(2017)The origin of highly efficient iodine doping of carbon nanotubes is not well understood. Relying on first-principles calculations, we found that iodine molecules (I2) in contact with a carbon nanotube interact to form ... -
Numb prevents a complete epithelial–mesenchymal transition by modulating Notch signalling
(2017)Epithelial–mesenchymal transition (EMT) plays key roles during embryonic development, wound healing and cancer metastasis. Cells in a partial EMT or hybrid epithelial/mesenchymal (E/M) phenotype exhibit collective cell ... -
Dissociation of One-Dimensional Matter-Wave Breathers due to Quantum Many-Body Effects
(2017)We use the ab initio Bethe ansatz dynamics to predict the dissociation of one-dimensional cold-atom breathers that are created by a quench from a fundamental soliton. We find that the dissociation is a robust quantum ... -
Correlations and enlarged superconducting phase of t−J⊥ chains of ultracold molecules on optical lattices
(2017)We compute physical properties across the phase diagram of the t−J⊥ chain with long-range dipolar interactions, which describe ultracold polar molecules on optical lattices. Our results obtained by the density-matrix ... -
Two-Dimensional Massless Dirac Fermions in Antiferromagnetic AFe2As2 (A=Ba,Sr)
(2017)We report infrared studies of AFe2As2 (A=Ba, Sr), two representative parent compounds of iron-arsenide superconductors, at magnetic fields (B) up to 17.5 T. Optical transitions between Landau levels (LLs) were observed in ... -
Local breaking of fourfold rotational symmetry by short-range magnetic order in heavily overdoped Ba(Fe1−xCux)2As2
(2017)We investigate Cu-doped Ba(Fe1−xCux)2As2 with transport, magnetic susceptibility, and elastic neutron scattering measurements. In the heavily Cu-doped regime where long-range stripe-type antiferromagnetic order in BaFe2As2 ... -
Molecular origin of the weak susceptibility of kinesin velocity to loads and its relation to the collective behavior of kinesins
(2017)Motor proteins are active enzymatic molecules that support important cellular processes by transforming chemical energy into mechanical work. Although the structures and chemomechanical cycles of motor proteins have been ... -
Distinguishing mechanisms underlying EMT tristability
(2017-11-01)Abstract Background The Epithelial-Mesenchymal Transition (EMT) endows epithelial-looking cells with enhanced migratory ability during embryonic development and tissue repair. ... -
Projected coupled cluster theory
(2017)Coupled cluster theory is the method of choice for weakly correlated systems. But in the strongly correlated regime, it faces a symmetry dilemma, where it either completely fails to describe the system or has to artificially ... -
Modeling radiation belt dynamics using a 3-D layer method code
(2017)A new 3-D diffusion code using a recently published layer method has been developed to analyze radiation belt electron dynamics. The code guarantees the positivity of the solution even when mixed diffusion terms are included. ...
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