Attoampere Level Leakage Current in Chemical Vapor Deposition-Grown Monolayer MoS Dynamic Random-Access Memory in Trap-Assisted Tunneling Limit.

MoS, one of the most researched two-dimensional semiconductor materials, has great potential as the channel material in dynamic random-access memory (DRAM) due to the low leakage current inherited from the atomically thin thickness, high band gap, and heavy effective mass. In this work, we fabricate one-transistor-one-capacitor (1T1C) DRAM using chemical vapor deposition (CVD)-grown monolayer (ML) MoS in large area and confirm the ultralow leakage current of approximately 10 A/μm, significantly lower than the previous report (10 A/μm) in two-transistor-zero-capacitor (2T0C) DRAM based on a few-layer MoS flake. Through rigorous analysis of leakage current considering thermionic emission, tunneling at the source/drain, Shockley-Read-Hall recombination, and trap-assisted tunneling (TAT) current, the TAT current is identified as the primary source of leakage current.

Realization of Extremely High-Gain and Low-Power in nMOS Inverter Based on Monolayer WS Transistor Operating in Subthreshold Regime.

In this work, we report an n-type metal-oxide-semiconductor (nMOS) inverter using chemical vapor deposition (CVD)-grown monolayer WS field-effect transistors (FETs). Our large-area CVD-grown monolayer WS FETs exhibit outstanding electrical properties including a high on/off ratio, small subthreshold swing, and excellent drain-induced barrier lowering. These are achieved by n-type doping using AlO/AlO and a double-gate structure employing high- dielectric HfO.

Indium-Gallium-Zinc Oxide-Based Synaptic Charge Trap Flash for Spiking Neural Network-Restricted Boltzmann Machine.

Recently, neuromorphic computing has been proposed to overcome the drawbacks of the current von Neumann computing architecture. Especially, spiking neural network (SNN) has received significant attention due to its ability to mimic the spike-driven behavior of biological neurons and synapses, potentially leading to low-power consumption and other advantages. In this work, we designed the indium-gallium-zinc oxide (IGZO) channel charge-trap flash (CTF) synaptic device based on a HfO/AlO/SiN/AlO layer.

Intraosseous cavernous angioma of the petrous bone.

Objective: Intraosseous cavernous angioma (CA) of the petrous bone is rare and preoperative diagnosis can be challenging, especially when its epicenter is outside the internal auditory canal (IAC) or geniculate ganglion.

Methods: A 45-year-old man presented to our clinic with right-sided hearing loss, tinnitus, and unsteadiness. Neuroimaging revealed a right posterior petrous mass.

Pleomorphic xanthoastrocytoma with an intracystic hemorrhage : a case report and literature review.

Pleomorphic xanthoastrocytoma (PXA) has been considered as a low grade tumor of adolescents and young adults. Although this tumor often shows cystic component, the hemorrhage within the cyst is extremely rare. The authors report a rare case of cystic PXA with a hemorrhage within the cyst and the mural nodule in the left frontal lobe.

Craniovertebral junction tuberculosis with atlantoaxial dislocation : a case report and review of the literature.

Craniovertebral junction (CVJ) tuberculosis is a rare disease, potentially causing severe instability and neurological deficits. The authors present a case of CVJ tuberculosis with atlantoaxial dislocation and retropharyngeal abscess in a 28-year-old man with neck pain and quadriparesis. Radiological evaluations showed a widespread extradural lesion around the clivus, C1, and C2.

Major depression with psychosis after resection of a giant middle fossa hemangiopericytoma.

Background: Postoperative onset of acute major depression in a patient with no previous history of psychiatric disorder is highly unexpected after skull base surgery.

Case Description: A 38-year-old woman with no previous physical or mental illness presented with a 3-month history of left ear pain, short-term memory disturbance, and motor dysphasia. Magnetic resonance imaging revealed a large extraaxial tumor in the left middle fossa.

Spinal cord hemangioblastoma: surgical strategy and clinical outcome.

Background And Aim: The authors present a retrospective analysis of 14 patients treated for spinal cord hemangioblastoma (SCH). This study was conducted to evaluate and compare the difference of functional outcomes associated with the extent of surgical removal of the tumor.

Methods: Eleven patients were male and three were female, with a mean age of 37.