5 papers
Thermodynamics of finite magnetic two-level systems
Peter Borrmann, Heinrich Stamerjohanns, Eberhard Hilf +3
We use Monte Carlo simulations to investigate the thermodynamical behaviour of aggregates consisting of few superparamagnetic particles in a colloidal suspension. The potential ene…
Structures and Stabilities of H3+(H2)n Clusters (n=1-11)
B. Diekmann, P. Borrmann, E. R. Hilf
Geometries and energies for H3+(H2)n clusters (n = 0, ..., 11) have been calculated using standard "ab initio" methods. Up to clusters with n = 6, four different Pople basis sets (…
Magnetism of small transition metal clusters and the effects of isomerisation
Peter Borrmann, Bernd Diekmann, Eberhard R. Hilf +1
We investigate the magnetic properties of small transition metal clusters using a simple statistical model, which requires some input data from ab initio spin-density functional ca…
Path Integral Density Functional Theory
Peter Borrmann
A new method ( PI-DFT ) which combines path integrals and density functional theory is proposed as a pathway to many fields of physics. Within path integral theory it is possible t…
New enhancements to Feynmans Path Integral for fermions
Peter Borrmann, Eberhard R. Hilf
We show that the computational effort for the numerical solution of fermionic quantum systems, occurring e.g., in quantum chemistry, solid state physics, field theory in principle…