The first heavy-fermion superconductor CeCu2Si2 was thought to have d-wave gap with node, until recent new measurements evident a fully opened gap. Recently, scientists from MPI-CPfS, Zhejiang University, Rice University and the University of Augsburg found a resolution to this puzzle based on measurements of the London penetration depth, which reconcile the d-wave pairing symmetry and nodeless gap structure.
A combined experimental and computational study carried out by scientists from the Max-Planck Institute for Chemical Physics of Solids, the Fritz-Haber-Institute of the Max-Planck-Society and the National Institute for Materials Science (NIMS) in Japan, reveals the intrinsic structural complexity of boron carbide. Modifications of the CBC chain in the reference pattern CBC+B12 yield sizeable negative energies of formation. Consistent with the computational work, the precise crystal structure determination and the high-resolution transmission-electron microscopy imaging verify substantial modifications in the CBC chain.
Ductility is a characteristic feature of metals and metallic materials, but rarely observed for semiconductors and insulators. Scientists from the MPI CPfS and the Shanghai Institute of Ceramics of the Chinese Academy of Science report extraordinary metal-like ductility for the semiconductor a-Ag2S. A unified picture was obtained by combining different manufacturing and physical characterization techniques with quantum chemical analysis of chemical bonding.
New X-ray spectra of the electronic structure of the transition metal oxide Ti2O3 reveal unprecedented electronic molecular detail about the transition from insulator to metal as temperature increases.