Fig. 2: Study on the weight control mechanism of the vdW-hybrid synaptic device.
From: Artificial van der Waals hybrid synapse and its application to acoustic pattern recognition
a X-TEM images of the WSe2/WCL/h-BN (potentiation channel) and MoS2/WCL/h-BN (depression channel) structures. b, c EELS mapping images obtained on the cross-sectional regions. d Extracted injection barrier height and work function for the potentiation and depression channels. e, f Excitatory (e) and inhibitory (f) PSC in the potentiation and depression channels. Illustration of energy band diagrams when an excitatory spike was applied to the WCTs for the potentiation and depression channels. g LTP curves through the WSe2 channel (Case 1) and LTD curves through the MoS2 channel (Case 2), where 128 excitatory spikes were applied in a row to the WCTs. h Illustration of energy band diagrams describing phenomena of electron trapping into the WCL. i LTP curves through MoS2 channel (Case 3) and LTD curves through WSe2 channel (Case 4), where 128 inhibitory spikes were applied in a row to the WCTs. j Illustration of energy band diagrams describing phenomena of electron detrapping from the WCL.
