8 papers
Extreme Electron-Phonon Coupling in Boron-based Layered Superconductors
J. M. An, S. Y. Savrasov, H. Rosner +1
The phonon-mode decomposition of the electron-phonon coupling in the MgB2-like system Li_{1-x}BC is explored using first principles calculations. It is found that the high temperat…
Insulating Ferromagnetism in LaBaCuO: an \textit{Ab Initio} Wannier Function Analysis
Wei Ku, H. Rosner, W. E. Pickett +1
Microscopic mechanisms of the puzzling insulating ferromagnetism of half-filled LaBaCuO are elucidated with energy-resolved Wannier states. The dominant ma…
Theoretical de Haas-van Alphen Data and Plasma Frequencies of MgB2 and TaB2
S. Elgazzar, P. M. Oppeneer, S. -L. Drechsler +2
The de Haas-van Alphen-frequencies as well as the effective masses for a magnetic field parallel to the crystallographic c-axis are calculated within the local spin density approxi…
Prediction of High Tc Superconductivity in Hole-doped LiBC
H. Rosner, A. Kitaigorodsky, W. E. Pickett
The layered lithium borocarbide LiBC, isovalent with and structurally similar to the superconductor MgB2, is an insulator due to the modulation within the hexagonal layers (BC vs.…
Realization of a large J_2 quasi-2D spin-half Heisenberg system: Li2VOSiO4
H. Rosner, R. R. P. Singh, W. H. Zheng +3
Exchange couplings are calculated for Li2VOSiO4 using LDA. While the sum of in-plane couplings J_1 + J_2 = 9.5 \pm 1.5 K and the inter-plane coupling J_{perp} \sim 0.2 - 0.3 K agre…
Electronic structure and weak electron-phonon coupling in TaB
H. Rosner, W. E. Pickett, S. -L. Drechsler +6
We present electronic structure calculations together with resistivity, susceptibility, and specific heat measurements for TaB to search for the recently contradictorily report…