We explore unconventional superconductivity of repulsive spinless fermions on square and honeycomb lattices with staggered sublattice potentials. The two can exhibit $d$-wave $f$-wave pairing, respectively, at low doping stemming from an effective two-valley band structure. At higher doping, in particular, the lattice displays a much richer phase diagram including topological $p+ip$ which is in...

Inspired by the physics of rare earth nickelates, we study photoemission (PES) and resonant inelastic X-ray scattering (RIXS) spectra a correlated electron system with two types insulating sublattices. Sublattice A is characterized hybridization gap low-spin state, while sublattice B features Mott local magnetic moment. We show how coupling these qualitatively different states affects dynamics ...

First-principles calculations based on a plane-wave pseudopotential method, as implemented in the VASP code, are presented for the formation energies of several transition-metal and non-transition-metal dopants in Ti–Al alloys. Substitution for either Ti or Al in g-TiAl, a2-Ti3Al, Ti2AlC, and Ti3AlC are considered. Calculated szero-temperatured defect formation energies exhibit clear trends as ...

Structural and magnetic properties of rapidly quenched alloys from the DyMn6−xGe6−xFex Alx (0 x 6) series produced by melt-spinning are investigated by x-ray diffraction (XRD) at room temperature (RT), magnetic measurements in the temperature range from 1.7 to 350 K, and 57Fe Mössbauer spectrometry at 77 and 300 K. Significant similarities in magnetic properties were found between mixed (crysta...

We present a theoretical study of the dynamics of H atoms adsorbed on graphene bilayers with Bernal stacking. First, through extensive density functional theory calculations, including van der Waals interactions, we obtain the activation barriers involved in the desorption and migration processes of a single H atom. These barriers, along with attempt rates and the energetics of H pairs, are use...

We investigate the effects of vacancies, disorder and sublattice polarization on the electronic properties of a monolayer graphene in the quantum Hall regime. Energy spectra as a function of magnetic field and the localization properties of the states within the graphene Landau levels (LLs) are calculated through a tight-binding model. We first discuss our results considering vacancies in the l...