Ferroelectric artificial synapse for neuromorphic computing and flexible applications.

Research of artificial synapses is increasing in popularity with the development of bioelectronics and the appearance of wearable devices. Because the high-temperature treatment process of inorganic materials is not compatible with flexible substrates, organic ferroelectric materials that are easier to process have emerged as alternatives. An organic synaptic device based on P(VDF-TrFE) was prepared in this study.

Asymmetric valley polarization and photoluminescence in MoS/MoO heterostructure.

We investigate circularly polarized photoluminescence (PL) in the MoS/MoO heterostructure, which was fabricated by transferring MoS monolayer to cover the MoO few layers on the SiO/Si substrate. It is shown that the PL with the same helicity as the excitation light is dominant due to the inherent chiral optical selectivity, which allows exciting one of the valleys in MoS monolayer. The degree of polarization (DP), which characterizes the intensity difference of two chiral components of PL, is unequal for the right-handed and left-handed circularly polarized excitations in the MoS/MoO heterostructure.