Benchmark Investigation of Band-Gap Tunability of Monolayer Semiconductors under Hydrostatic Pressure with Focus-On Antimony.

In this paper, the band-gap tunability of three monolayer semiconductors under hydrostatic pressure was intensively investigated based on first-principle simulations with a focus on monolayer antimony (Sb) as a semiconductor nanomaterial. As the benchmark study, monolayer black phosphorus (BP) and monolayer molybdenum disulfide (MoS) were also investigated for comparison. Our calculations showed that the band-gap tunability of the monolayer Sb was much more sensitive to hydrostatic pressure than that of the monolayer BP and MoS.

Room temperature ferromagnetism in D-D neutron irradiated rutile TiO single crystals.

Room temperature ferromagnetism (RTFM) was observed in unirradiated rutile TiO single crystals prepared by the floating zone method due to oxygen vacancy (V) defects. D-D neutrons mainly collide elastically with TiO, producing V, titanium vacancies (V) and other point defects; the density and kind of defect is related to the neutron irradiation fluence. D-D neutron irradiation is used to regulate the concentration and type of defect, avoiding impurity elements.