Combined computational and experimental investigation of the La 2 CuO 4– x S x (0 ≤ x ≤ 4) quaternary system
Abstract not provided
He, Hua↗
Engineering topics
Yee, Chuck-Hou
Publications and source records attributed to Yee, Chuck-Hou.
Weyl-link semimetals
A family of topological semimetallic phases where twofold degenerate gapless points form linked rings is introduced here. We refer to this phase as Weyl-link semimetals. A concrete two-band model with two linked nodal lines is constructed. We demonstrate that the Chern-Simons 3-form depends on the linking number of rings in a generic two-band model. In addition, we show the emergence of zero-energy modes in the Landau level spectrum can reveal the location of nodal lines, providing a method of probing their linking number.
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND↗
Interfaces in coexisting metals and Mott insulators
Motivated by the direct observation of electronic phase separation in first-order Mott transitions, we model the interface between thermodynamically coexisting metals and Mott insulators. In this work, we show how to model the required slab geometry and extract the electronic spectra. We construct an effective Landau free energy and compute the variation of its parameters across the phase diagram. Finally, using a linear mixture of the density and double occupancy, we identify a natural Ising order parameter which unifies the treatment of the bandwidth and filling controlled Mott transitions.
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND↗
Guided design of copper oxysulfide superconductors
We describe a framework for designing novel materials, combining modern first-principles electronic-structure tools, materials databases, and evolutionary algorithms capable of exploring large configurational spaces. Guided by the chemical principles introduced by Antipov et al., for the design and synthesis of the Hg-based high-temperature superconductors, we apply our framework to screen 333 proposed compositions to design a new layered copper oxysulfide, Hg(CaS)2CuO2. We evaluate the prospects of superconductivity in this oxysulfide using theories based on charge-transfer energies, orbital distillation and uniaxial strain.
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND↗