Now showing items 1-10 of 341
On the generalized eigenvalue method for energies and matrix elements in lattice field theory
(INT SCHOOL ADVANCED STUDIES, 2009)
We discuss the generalized eigenvalue problem for computing energies and matrix elements in lattice gauge theory, including effective theories such as HQET. It is analyzed how the extracted effective energies and matrix ...
Effect of barium titanate seed particles on the sintering and lattice parameters in PbMg1/3Nb2/3O3 ceramics
PbMg1/3Nb2/3O3 (PMN) powder was prepared by citrate organic solution, and barium titanate (BT) seed particles were added to encourage the perovskite phase formation. Sintering was followed using the constant heating rate ...
Anomalous lattice parameter of magnetic semiconductor alloys
(AMER INST PHYSICS, 2009)
The addition of transition metals to III-V semiconductors radically changes their electronic, magnetic, and structural properties. We show by ab initio calculations that in contrast to the conventional semiconductor alloys, ...
PROBING THE LADDER SPECTRUM ARISING FROM MOTION IN A TWO-DIMENSIONAL LATTICE DRIVEN BY IN-PLANE CONSTANT FORCES
(AMERICAN PHYSICAL SOCIETY, 2004)
Magnetically driven lattice instabilities
The spin-lattice interaction, which very recent experiments suggest is significant in the layered perovskites, is modeled by adding to the coupling constant of the anisotropic Heisenberg antiferromagnet a linear dependence ...
QCD phenomenology with infrared finite SDE solutions
Recent progress in the solution of Schwinger-Dyson equations (SDE), as well as lattice simulation of pure glue QCD, indicate that the gluon propagator and coupling constant are infrared (IR) finite. We discuss how this ...