Disorder Induced Anomalous Hall Effect in Type-I Weyl Metals: Connection between the Kubo-Streda Formula in the Spin and Chiral basis

We study the anomalous Hall effect (AHE) in tilted Weyl metals with Gaussian disorder under the Kubo-Streda formalism in this work. To separate the three different contributions, namely the intrinsic, side jump and skew scattering, it's usually considered necessary to go to the eigenband (chiral) basis of the Kubo-Streda formula. However, it's more straight-forward to compute the total Hall current in the spin basis. For the reason, we develop a systematic and transparent scheme to separate the three different contributions in the spin basis by building a one-to-one correspondence between the Feynmann diagrams of the different contributions in the chiral basis and the products of the symmetric and anti-symmetric part of the polarization operator in the spin basis. We obtain the three contributions of the AHE in type-I Weyl metals with our scheme and compared the difference with the semi-classical Boltzmann equation approach. Our scheme is applicable for general anomalous Hall systems with Gaussian disorder, and is especially useful for anisotropic systems for which both the semi-classical approach and the Kubo-Streda formula in the chiral basis encounter diffculties in computing the disorder induced anomalous Hall effect.Comment: 15 pages, 5figure

[2-({Benz­yl[2-(benz­yl{5-methyl-2-oxido-3-[(pyridin-2-ylmeth­yl)imino­meth­yl]benz­yl}amino)­eth­yl]aza­nium­yl}meth­yl)-4-methyl-6-[(pyridin-2-ylmeth­yl)imino­meth­yl]phenolato]nickel(II) perchlorate methanol disolvate

In the solvated title complex, [Ni(C46H47N6O2)]ClO4·2CH4O, the coordination sphere around the NiII ion can be described as distorted cis-NiO2N4 octa­hedral defined by two phenolate O atoms and four N atoms from the hexa­dentate ligand. An intra­molecular bifurcated N—H⋯(N,O) hydrogen bond helps to establish the conformation of the complex mol­ecule. In the crystal, the components are connected by O—H⋯O and C—H⋯O hydrogen bonds

Formation of Nanofoam carbon and re-emergence of Superconductivity in compressed CaC6

Pressure can tune material's electronic properties and control its quantum state, making some systems present disconnected superconducting region as observed in iron chalcogenides and heavy fermion CeCu2Si2. For CaC6 superconductor (Tc of 11.5 K), applying pressure first Tc increases and then suppresses and the superconductivity of this compound is eventually disappeared at about 18 GPa. Here, we report a theoretical finding of the re-emergence of superconductivity in heavily compressed CaC6. The predicted phase III (space group Pmmn) with formation of carbon nanofoam is found to be stable at wide pressure range with a Tc up to 14.7 K at 78 GPa. Diamond-like carbon structure is adhered to the phase IV (Cmcm) for compressed CaC6 after 126 GPa, which has bad metallic behavior, indicating again departure from superconductivity. Re-emerged superconductivity in compressed CaC6 paves a new way to design new-type superconductor by inserting metal into nanoporous host lattice.Comment: 31 pages, 12 figures, and 4 table

3-(4-Amino-3-ethyl-5-sulfanyl­idene-4,5-dihydro-1H-1,2,4-triazol-1-yl)-3-(2-chloro­phen­yl)-1-phenyl­propan-1-one

In the title mol­ecule, C19H19ClN4OS, the 1,2,4-triazole ring forms dihedral angles of 86.0 (2) and 65.6 (2)° with the phenyl and chloro­phenyl rings, respectively. In the crystal, inter­molecular N—H⋯S and N—H⋯O hydrogen bonds link mol­ecules into centrosymmetric dimers, which are further linked into chains in [001] via weak C—H⋯π inter­actions

N-Acetyl-N-{2-[(Z)-2-chloro-3,3,3-tri­fluoro­prop-1-en­yl]phen­yl}acetamide

The title compound, C13H11ClF3NO2, adopts a Z conformation. Halogen⋯oxygen inter­actions [Cl⋯O = 2.967 (3) Å] in the crystal packing lead to the formation of a dimer joined by two Cl⋯O bonds

Excited Heavy Quarkonium Production at the LHC through WW-Boson Decays

Sizable amount of heavy-quarkonium events can be produced through $W$-boson decays at the LHC. Such channels will provide a suitable platform to study the heavy-quarkonium properties. The "improved trace technology", which disposes the amplitude ${\cal M}$ at the amplitude-level, is helpful for deriving compact analytical results for complex processes. As an important new application, in addition to the production of the lower-level Fock states $|(Q\bar{Q'})[1S]>$ and $|(Q\bar{Q'})[1P]>$, we make a further study on the production of higher-excited $|(Q\bar{Q'})>$-quarkonium Fock states $|(Q\bar{Q'})[2S]>$, $|(Q\bar{Q'})[3S]>$ and $|(Q\bar{Q'})[2P]>$. Here $|(Q\bar{Q'})>$ stands for the $|(c\bar{c})>$-charmonium, $|(c\bar{b})>$-quarkonium and $|(b\bar{b})>$-bottomonium respectively. We show that sizable amount of events for those higher-excited states can also be produced at the LHC. Therefore, we need to take them into consideration for a sound estimation.Comment: 7 pages, 9 figures and 6 tables. Typo errors are corrected, more discussions and two new figures have been adde