2 research outputs found
Analytic Density of States in the Abrikosov-Gorkov Theory
Since the early 1960s, Abrikosov-Gorkov theory has been used to describe
superconductors with paramagnetic impurities. Interestingly, the density of
states resulting from the theoretical framework has to date only been known
approximately, as a numeric solution of a complex polynomial. Here we introduce
an exact analytic solution for the density of states of a superconductor with
paramagnetic impurities. The solution is valid in the whole regime of
Abrikosov-Gorkov theory; both where there is an energy gap and gapless. While
of fundamental interest, we argue that this solution also has computational
benefits in the evaluation of integrals for tunneling conductances and allows
for an analytic description of materials with densities of states that are
modeled from the basic Abrikosov-Gorkov density of states.Comment: 5 pages, 1 figur
Films of Mn12-acetate deposited by low-energy laser ablation
Thin films of the molecular magnet Mn12-acetate, [Mn12 O12(CH3COO)16 (H2O)4]
2CH3COOH 4H2O, have been prepared using a laser ablation technique with a
nitrogen laser at low laser energies of 0.8 and 2 mJ. Chemical and magnetic
characterizations show that the Mn12-acetate cores remain intact and the films
show similar magnetic properties to those of the parent molecular starting
material. In addition, the magnetic data exhibit a peak in the magnetization at
27 K indicating the creation of an additional magnetic phase not noted in
previous studies of crystalline phases.Comment: 8 pages, 5 figures, In Press - J. Mag. Mag. Ma