3,806 research outputs found
-wave Pairing in BiS Superconductors
Recent angle resolved photoemission spectroscopy(ARPES) experiments have
suggested that BiS based superconductors are at very low electron doping.
Using random phase approximation(RPA) and functional renormalization group(FRG)
methods, we find that -wave pairing symmetry belonging to A
irreducible representation is dominant at electron doping . The pairing
symmetry is determined by inter-pocket nesting and orbital characters on the
Fermi surfaces and is robust in a two-orbital model including both Hund's
coupling , and Hubbard-like Coulomb interactions and with
relatively small (). With the increasing electron doping, the
g-wave state competes with both the s-wave and d-wave states
and no pairing symmetry emerges dominantly.Comment: published version, EPL(editor's choice
Possible open-charmed pentaquark molecule --- the bound state --- in the Bethe-Salpeter formalism
We study the -wave bound state in the Bethe-Salpeter formalism in
the ladder and instantaneous approximations. With the kernel generated by the
hadronic effective Lagrangian, two open-charmed bound states, which quantum
numbers are , and , ,
respectively, are predicted as new candidates of hadronic pentaquark molecules
in our formalism. If existing, they could contribute to the broad 3188 eV
structure near the five new narrow states observed recently by the
LHCb Collaboration.Comment: 8 pages, 4 figures, accepted by Eur. Phys. J.
New Supernova Candidates from SDSS-DR7 of Spectral Survey
The letter presents 25 discovered supernova candidates from SDSS-DR7 with our
dedicated method, called Sample Decrease, and 10 of them were confirmed by
other research groups, and listed in this letter. Another 15 are first
discovered including 14 type Ia and one type II based on Supernova
Identification (SNID) analysis. The results proved that our method is reliable,
and the description of the method and some detailed spectra analysis procedures
were also presented in this letter.Comment: 6 pages, 3 figure
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