Two-dimensional transition-metal halide CoBr with spin-polarized Dirac cone.

Recently, the discovery of two-dimensional transition-metal materials with non-trivial magnetic and electronic properties has spurred huge interest in investigating their applications in nanotechnology. Here, we report that the monolayer of CoBr possesses a quantum anomalous Hall insulating phase generated on the basis of first-principles calculations. We find that the CoBr monolayer is an intrinsic two-dimensional ferromagnetic material with a Curie temperature T = 264 K predicted from Monte Carlo simulations.

Scientific Collaboration in Chinese Nursing Research: A Social Network Analysis Study.

Collaboration has become very important in research and in technological progress. Coauthorship networks in different fields have been intensively studied as an important type of collaboration in recent years. Yet there are few published reports about collaboration in the field of nursing.