218 citations · 1.1k across the 20 of their papers we have counts for
20 papers
Fano q-reversal in topological insulator Bi2Se3
S. V. Dordevic, G. M. Foster, M. S. Wolf +6
We studied magneto-optical response of a canonical topological insulator BiSe with the goal of addressing a controversial issue of electron-phonon coupling. Magnetic-field…
Angle-resolved spectroscopy study of Ni-based superconductor SrNiAs
L. -K. Zeng, P. Richard, A. van Roekeghem +7
We performed an angle-resolved photoemission spectroscopy study of the Ni-based superconductor SrNiAs. Electron and hole Fermi surface pockets are observed, but their diffe…
Magneto-infrared spectroscopy of Landau levels and Zeeman splitting of three-dimensional massless Dirac Fermions in ZrTe
R. Y. Chen, Z. G. Chen, X. -Y. Song +4
We present a magneto-infrared spectroscopy study on a newly identified three-dimensional (3D) Dirac semimetal ZrTe. We observe clear transitions between Landau levels and their…
Resonant inelastic x-ray scattering study of electronic excitations in insulating KFeSe
H. Gretarsson, T. Nomura, I. Jarrige +9
We report an Fe -edge resonant inelastic X-ray scattering (RIXS) study of KFeSe. This material is an insulator, unlike many parent compounds of iron-based…
Temperature-driven band inversion in PbSnSe: Optical and Hall-effect studies
Naween Anand, Zhiguo Chen, Sanal Buvaev +7
Optical and Hall-effect measurements have been performed on single crystals of PbSnSe, a IV-VI mixed chalcogenide. The temperature dependent (10--300 K) reflectan…
Continuous magnetic phase transition in half-frustrated Ca2Os2O7
P. Zheng, Y. G. Shi, Q. S. Wu +8
We present the specific heat, magnetization, optical spectroscopy measurements and the firstprinciple calculations on the Weberite structure Ca2Os2O7 single crystal/polycrystalline…
Single crystal growth and optical conductivity of SrPtAs superconductors
A. F. Fang, T. Dong, H. P. Wang +8
SrPtAs single crystals with CaBeGe-type structure were synthesized by self-melting technique. X-ray diffraction, transmission electron microscopy, electrical resist…
Two successive field-induced spin-flop transitions in single-crystalline CaCoAs
B. Cheng, B. F. Hu, R. H. Yuan +8
CaCoAs, a ThCrSi-structure compound, undergoes an antiferromagnetic transition at \emph{T}=76K with the magnetic moments being aligned parallel to the…
Hybridization gap versus hidden order gap in URuSi as revealed by optical spectroscopy
W. T. Guo, Z. G. Chen, T. J. Williams +3
We present the in-plane optical reflectance measurement on single crystals of URuAs. The study revealed a strong temperature-dependent spectral evolution. Above 50 K, the l…
Optical study of the multiple charge density wave transitions in ErTe
B. F. Hu, B. Cheng, R. H. Yuan +7
We present an optical spectroscopy study on singe crystalline ErTe, a rare-earth-element tri-telluride which experiences two successive charge density wave (CDW) transitions at…
Revealing the dual nature of magnetism in iron pnictides and iron chalcogenides using x-ray emission spectroscopy
H. Gretarsson, A. Lupascu, Jungho Kim +18
We report Fe K beta x-ray emission spectroscopy study of local magnetic moments in various iron based superconductors in their paramagnetic phases. Local magnetic moments are found…
Isotopic Composition of Light Nuclei in Cosmic Rays: Results from AMS-01
01 Collaboration
The variety of isotopes in cosmic rays allows us to study different aspects of the processes that cosmic rays undergo between the time they are produced and the time of their arriv…
High energy pseudogap and its evolution with doping in Fe-based superconductors as revealed by optical spectroscopy
N. L. Wang, W. Z. Hu, Z. G. Chen +4
We report optical spectroscopic measurements on electron- and hole-doped BaFe2As2. We show that the compounds in the normal state are not simple metals. The optical conductivity sp…
Infrared spectrum and its implications for the electronic structure of the semiconducting iron selenide KFeSe
Z. G. Chen, R. H. Yuan, T. Dong +7
We report an infrared spectroscopy study on KFeSe, a semiconducting parent compound of the new iron-selenide system. The major spectral features are found to…
Optical spectroscopy study on CeTe: evidence for multiple charge-density-wave orders
B. F. Hu, P. Zheng, R. H. Yuan +4
We performed optical spectroscopy measurement on single crystal of CeTe, a rare-earth element tri-telluride charge density wave (CDW) compound. The optical spectra are found to…
Three dimensionality of band structure and a large residual quasiparticle population in BaKFeAs as revealed by the c-axis polarized optical measurement
B. Cheng, Z. G. Chen, C. L. Zhang +10
We report on a c-axis polarized optical measurement on a BaKFeAs single crystal. We find that the c-axis optical response is significantly different from…
Formation of partial energy gap below the structural phase transition and the rare-earth element substitution effect on infrared phonons in ReFeAsO (Re=La, Nd, and Sm)
T. Dong, Z. G. Chen, R. H. Yuan +3
Single crystals of LaFeAsO, NdFeAsO, and SmFeAsO have been prepared by means of a NaAs flux growth technique and studied by optical spectroscopy measurements. We show that the spec…
Optical spectroscopy study on single crystalline LaFeAsO
Z. G. Chen, R. H. Yuan, T. Dong +1
Millimeter-sized single crystals of LaFeAsO were grown from NaAs flux and the in-plane optical properties were studied over a wide frequency range. A sizable electronic correlation…
Protons in near earth orbit
AMS Collaboration
The proton spectrum in the kinetic energy range 0.1 to 200 GeV was measured by the Alpha Magnetic Spectrometer (AMS) during space shuttle flight STS-91 at an altitude of 380 km. Ab…
Search for antihelium in cosmic rays
AMS Collaboration
The Alpha Magnetic Spectrometer (AMS) was flown on the space shuttle Discovery during flight STS-91 in a 51.7 degree orbit at altitudes between 320 and 390 km. A total of 2.86 * 10…