Publications (25)
The distinct in-plane resistivity anisotropy in the nematic states of detwinned NaFeAs and FeTe single crystals: evidences for Hund's rule metal
Juan Jiang, C. He, Y. Zhang +6
The in-plane resistivity anisotropy has been studied with the Montgomery method on two detwinned parent compounds of the iron-based superconductors, NaFeAs and FeTe. For NaFeAs, th…
Euler equation of the optimal trajectory for the fastest magnetization reversal of nano-magnetic structures
X. R. Wang, P. Yan, J. Lu +1
Based on the modified Landau-Lifshitz-Gilbert equation for an arbitrary Stoner particle under an external magnetic field and a spin-polarized electric current, differential equatio…
Electronic structure reconstruction: the driving force behind the magnetic and structural transitions in NaFeAs
C. He, Y. Zhang, B. P. Xie +11
The electronic structure of NaFeAs is studied with angle resolved photoemission spectroscopy on high quality single crystals. Large portions of the band structure start to shift ar…
Heavily electron-doped electronic structure and isotropic superconducting gap in AxFe2Se2 (A=K,Cs)
Y. Zhang, L. X. Yang, M. Xu +10
The low energy band structure and Fermi surface of the newly discovered superconductor, AxFe2Se2 (A=K,Cs), have been studied by angle-resolved photoemission spectroscopy. Compared…
Compositional Measurements of Saturn's Upper Atmosphere and Rings from Cassini INMS
J. Serigano, S. M. Hörst, C. He +4
The Cassini spacecraft's last orbits directly sampled Saturn's thermosphere and revealed a much more chemically complex environment than previously believed. Observations from the…
AGATA - Advanced Gamma Tracking Array
S. Akkoyun, A. Algora, B. Alikhani +351
The Advanced GAmma Tracking Array (AGATA) is a European project to develop and operate the next generation gamma-ray spectrometer. AGATA is based on the technique of gamma-ray ener…
Hunting for Orphaned Central Compact Objects among Radio Pulsars
J. Luo, C. -Y. Ng, W. C. G. Ho +3
Central compact objects (CCOs) are a handful of young neutron stars found at the center of supernova remnants (SNRs). They show high thermal X-ray luminosities but no radio emissio…
Low Cross-Talk Optical Addressing of Trapped-Ion Qubits Using a Novel Integrated Photonic Chip
A. S. Sotirova, B. Sun, J. D. Leppard +10
Individual optical addressing in chains of trapped atomic ions requires generation of many small, closely spaced beams with low cross-talk. Furthermore, implementing parallel opera…
Faceted Exploration of Emerging Resource Spaces
H. Zhuge, C. He
Humans have the ability to regcognize the real world from different facets. Faceted exploration is a mechanism for browsing and understanding large-scale resources in information n…
The orbital characters of bands in iron-based superconductor BaFe1.85Co0.15As2
Y. Zhang, F. Chen, C. He +13
The unconventional superconductivity in the newly discovered iron-based superconductors is intimately related to its multi-band/multi-orbital nature. Here we report the comprehensi…
Correlation effects of exchange splitting and coexistence of spin-density-wave and superconductivity in single crystalline Sr1-xKxFe2As2
Y. Zhang, J. Wei, H. W. Ou +13
The nature of spin-density wave and its relation with superconductivity are crucial issues in the newly discovered Fe-based high temperature superconductors. Particularly it is unc…
Primary role of the barely occupied states in the charge density wave formation of NbSe2
D. W. Shen, Y. Zhang, L. X. Yang +13
NbSe2 is a prototypical charge-density-wave (CDW) material, whose mechanism remains mysterious so far. With angle resolved photoemission spectroscopy, we mapped out the CDW gap and…
Surface and bulk electronic structures of LaOFeAs studied by angle resolved photoemission spectroscopy
L. X. Yang, B. P. Xie, Y. Zhang +15
The electronic structure of LaOFeAs, a parent compound of iron-arsenic superconductors, is studied by angleresolved photoemission spectroscopy. By examining its dependence on photo…
Specific heat of the iron-based high- superconductor SmOFFeAs
L. Ding, C. He, J. K. Dong +4
The specific heat of new iron-based high- superconductor SmOFFeAs () was systematically studied. For undoped = 0 sample, a specific h…
Strong correlation and massive spectral-weight redistribution induced spin density wave in a-Fe1.06Te
Y. Zhang, F. Chen, C. He +11
The electronic structure of a-Fe1.06Te is studied with angle-resolved photoemission spectroscopy. We show that there is substantial spectral weight around Gamma and X, and lineshap…
Symmetry breaking via orbital-dependent reconstruction of electronic structure in uniaxially strained NaFeAs
Y. Zhang, C. He, Z. R. Ye +11
The superconductivity discovered in iron-pnictides is intimately related to a nematic ground state, where the C4 rotational symmetry is broken via the structural and magnetic trans…
The Correlation between Dispersion Measure and X-ray Column Density from Radio Pulsars
C. He, C. -Y. Ng, V. M. Kaspi
Pulsars are remarkable objects that emit across the entire electromagnetic spectrum, providing a powerful probe of the interstellar medium. In this study, we investigate the relati…
Photoemission study and band alignment of GaN passivation layers on GaInP heterointerface
S. Shekarabi, M. A. Zare Pour, H. Su +6
III-V semiconductor-based photoelectrochemical (PEC) devices show the highest solar-to-electricity or solar-to-fuel conversion efficiencies. GaInP is a relevant top photoabsorber l…
Hubble Space Telescope survey of Magellanic Cloud star clusters. Binaries among the split main sequences of NGC 1818, NGC 1850, and NGC 2164
F. Muratore, A. P. Milone, F. D'Antona +15
Nearly all star clusters younger than ~600 Myr exhibit extended main sequence turn offs and split main sequences (MSs) in their color-magnitude diagrams. Works based on both photom…
Electronic structure and exotic exchange splitting in spin-density-wave states of BaFeAs
L. X. Yang, Y. Zhang, H. W. Ou +19
The magnetic properties in the parent compounds are often intimately related to the microscopic mechanism of superconductivity. Here we report the first direct measurements on the…
Doping-insensitive density-of-states suppression in polycrystalline iron-based superconductor SmOFFeAs
H. W. Ou, Y. Zhang, J. F. Zhao +15
We investigated the temperature dependence of the density-of-states in the iron-based superconductor SmO_1-xF_xFeAs (x=0, 0.12, 0.15, 0.2) with high resolution angle-integrated pho…
Phase Diagram and Quantum Critical Point in Newly Discovered Superconductors: SmO_{1-x}F_xFeAs
R. H. Liu, G. Wu, T. Wu +11
The magnetic fluctuations associated with a quantum critical point (QCP) are widely believed to cause the non-Fermi liquid behaviors and unconventional superconductivities, for exa…
A Complete 16 micron-Selected Galaxy Sample at : Mid-infrared Spectral Energy Distributions
J. -S. Huang, Y. -S. Dai, S. P. Willner +21
We describe a complete, flux-density-limited sample of galaxies at redshift selected at 16 micron. At the selection wavelength near 8 micron rest, the observed emis…
The theory of magnetic field induced domain-wall propagation in magnetic nanowires
X. R. Wang, P. Yan, J. Lu +1
A global picture of magnetic domain wall (DW) propagation in a nanowire driven by a magnetic field is obtained: A static DW cannot exist in a homogeneous magnetic nanowire when an…
Angle integrated photoemission study of SmOFFeAs
H. W. Ou, J. F. Zhao, Y. Zhang +10
The electronic structure of the new superconductor, SmOFFeAs (), has been studied by angle-integrated photoemission spectroscopy. Our data show a sharp feature…