Physics, Department of
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Recent Submissions
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Mean transverse energy of ultrananocrystalline diamond photocathode
(AIP Publishing, 2019-03-05)Nitrogen incorporated ultrananocrystalline diamond [(N)UNCD] could be an enabling material platform for injector photocathode applications due to its high emissivity. While the quantum efficiency (QE) of UNCD was reported ... -
Relaxation Times for Chiral Transport Phenomena and Spin Polarization in Strongly Coupled Plasma
(American Physical Society, 2018-09)We compute the dynamical relaxation times for chiral transport phenomena in a strongly coupled regime using the AdS/CFT correspondence. These relaxation times can be a useful proxy for the dynamical timescale for achieving ... -
Benchmarking the GW Approximation and Bethe–Salpeter Equation for Groups IB and IIB Atoms and Monoxides
(American Chemical Society, 2017-04-07)Energies from the GW approximation and the Bethe–Salpeter equation (BSE) are benchmarked against the excitation energies of transition-metal (Cu, Zn, Ag, and Cd) single atoms and monoxide anions. We demonstrate that best ... -
Vortex cutting in superconductors.
(American Physical Society, 2016-08-09)Vortex cutting and reconnection is an intriguing and still-unsolved problem central to many areas of classical and quantum physics, including hydrodynamics, astrophysics, and superconductivity. Here, we describe ... -
Origin of the turn-on temperature behavior in WTe2
(American Physical Society, 2015-11-03)A hallmark of materials with extremely large magnetoresistance (XMR) is the transformative turn-on temperature behavior: when the applied magnetic field H is above certain value, the resistivity versus temperature ρ(T) ... -
Same-sign dilepton excesses and light top squarks
(American Physical Society, 2015-10-28)Run 1 data of the Large Hadron Collider (LHC) contain excessive events in the same-sign dilepton channel with b-jets and missing transverse energy (MET), which were observed by five separate analyses from the ATLAS and CMS ... -
Probing compressed bottom squarks with boosted jets and shape analysis
(American Physical Society, 2015-11-05)A feasibility study is presented for the search of the lightest bottom squark (sbottom) in a compressed scenario, where its mass difference from the lightest neutralino is 5 GeV. Two separate studies are performed: 1) a ... -
Interpretations of the ATLAS diboson anomaly
(Elsevier, 2015-12-17)Recently, the ATLAS Collaboration recorded an interesting anomaly in diboson production with excesses at the diboson invariant mass around 2 TeV in boosted jets of all the WZ, W+W-, and ZZ channels. We offer a theoretical ... -
Universality of Plasmon Excitations in Dirac Semimetals
(American Physical Society, 2015-12-02)We investigate the properties of the collective plasmon excitations in Dirac semimetals by using the methods of relativistic field theory. We find a strong and narrow plasmon excitation whose frequency is in the terahertz ... -
First-principles study of size- and edge-dependent properties of MXene nanoribbons
(American Physical Society, 2016-03-09)We present results and analyses from first-principles calculations aimed at exploring the size- and edge-dependent properties of a wide range of MXene nanoribbons cut from two-dimensional (2D) semiconducting MXenes. The ... -
New class of planar ferroelectric Mott insulators via first-principles design
(American Physical Society, 2015-12-11)The bulk photovoltaic effect requires a low electronic band gap (i.e., ≈1-2 eV) and large electronic polarization, which is not common in known materials. Here we use first-principles calculations to design layered double ... -
ATLAS Z plus missing transverse energy excess in the MSSM
(American Physical Society, 2015-10-21)We demonstrate that the 3σ excess observed by ATLAS in the Z+MET channel can be explained within the context of the MSSM. Using the freedom inherent in the pMSSM, we perform a detailed analysis of the parameter space and ... -
Analysis of convex rib hybrid surface plasmon waveguide with ultralong propagation distance and tight mode confinement.
(Society of Photo-optical Instrumentation Engineers, 2016-01-01)A hybrid surface plasmon waveguide (HSPWG) with a convex rib added on the metal surface is further investigated and analyzed theoretically. The high mode confinement and long propagation distance can be realized ... -
Differential conductance and defect states in the heavy-fermion superconductor CeCoIn5.
(American Physical Society, 2016-01-22)We demonstrate that the electronic band structure extracted from quasiparticle interference spectroscopy [Nat. Phys. 9, 468 (2013)] and the theoretically computed form of the superconducting gaps [Proc. Natl. Acad. Sci. ... -
Leptoquark induced rare decay amplitudes h -> tau(-/+)mu(+/-) and tau -> mu gamma
(American Physical Society, 2016-01)Rare decay modes of the newly discovered standard-model-like Higgs boson h may test the flavor-changing couplings in the leptoquark sector through the process h -> tau(-/+)mu(+/-). Motivated by the recently reported excess ... -
Diffusion and self-assembly of C60 molecules on monolayer graphyne sheets.
(Nature Publishing Group, 2016-02-25)The motion of a fullerene (C60) on 5 different types of graphyne is studied by all-atom molecular dynamics simulations and compared with former studies on the motion of C60 on graphene. The motion shows a diffusive behavior ... -
Enhancing superconducting critical current by randomness
(American Physical Society, 2016-01)The key ingredient of high critical currents in a type-II superconductor is defect sites that pin vortices. Contrary to earlier understanding on nanopatterned artificial pinning, here we show unequivocally the advantages ... -
Controlling the flow of spin and charge in nanoscopic topological insulators.
(American Physical Society, 2016-02-01)Controlling the flow of spin and charge currents in topological insulators (TIs) is a crucial requirement for applications in quantum computation and spin electronics. We demonstrate that such control can be established ... -
Position-sensitive change in the transition metal L-edge fine structures.
(American Institute of Physics, 2015-10-05)Studying the structure and composition of solid-state materials on the atomic scale has become nearly routine in transmission electron microscopy with the development of novel electron optics and electron sources. In ... -
Acceptance dependence of fluctuation measures near the QCD critical point.
(American Physical Society, 2016-03-28)We argue that a crucial determinant of the acceptance dependence of fluctuation measures in heavy-ion collisions is the range of correlations in the momentum space, e.g., in rapidity, ycorr. The value of ycorr ∼ 1 for ...
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