Preparation and spectra of some hexanuclear niobium halide cluster compounds

The finite $N$ origin of the Bardeen-Moshe-Bander phenomenon and its extension at $N=\infty$ by singular fixed points

“…First, the value of α BMB found at the LPA is quantitatively rather poor compared to other quantities determined at the same order [42,49]. A study at the next order of the derivative expansion shows that it improves as well as α c and that it can be further improved by studying the dependence of these numbers on the choice of regulator function R k (q) [50][51][52][53][54]: This will be the subject of a forthcoming publication [55]. Another challenge is to follow all FPs in the whole (d, N ) plane and more precisely at moderate and small N .…”