Monoclinic LaSb2 Superconducting Thin Films.

Rare-earth diantimondes exhibit coupling between structural and electronic orders, which are tunable under pressure and temperature. Here we present the discovery of a new polymorph of LaSb2 stabilized in thin films synthesized using molecular beam epitaxy. Using diffraction, electron microscopy, and first-principles calculations we identify a YbSb2-type monoclinic lattice as a yet-uncharacterized stacking configuration. The material hosts superconductivity with a Tc = 2 K, which is enhanced relative to the bulk ambient phase, and a long superconducting coherence length of 1730 Å. This result highlights the potential thin film growth has in stabilizing novel stacking configurations in quasi-two-dimensional compounds with competing layered structures.

2-({[(2S)-1-Hy-droxy-1,1,3-tri-phenyl-propan-2-yl]imino}-meth-yl)-4,6-bis-(4-methyl-phen-yl)phenol.

The title compound, C42H37NO2, crystallizes in the ortho-rhom-bic space group P212121 with one mol-ecule in the asymmetric unit. An intra-molecular hydrogen bond orients the phenol hydroxyl group toward the imine nitro-gen. The aliphatic alcohol is engaged in a weak intra-molecular hydrogen bond with the imine nitro-gen.