M.A. Lutz, R.M. Feenstra, et al.
Surface Science
In the theory of interacting two-dimensional (2D) electron systems, two-particle spectral densities defined as integrals over two independent wave vectors, constrained by a δ function, frequently occur. The numerical calculation of these spectral densities, formally 4D integrals constrained by a δ function, can be efficiently implemented by a generalization of the tetrahedron method, widely used in the 3D band-structure density-of-states calculation, to the four-dimensional case. We present the expressions needed to set up the 4D simplex density-of-states calculation, and give as an example the 4D free-electron band-structure density of states. © 1996 The American Physical Society.
M.A. Lutz, R.M. Feenstra, et al.
Surface Science
A. Reisman, M. Berkenblit, et al.
JES
P.C. Pattnaik, D.M. Newns
Physical Review B
P. Martensson, R.M. Feenstra
Journal of Vacuum Science and Technology A: Vacuum, Surfaces and Films