scholarly journals Efficient Ab Initio Modeling of Dielectric Screening in 2D van der Waals Materials: Including Phonons, Substrates, and Doping

2020 ◽  
Vol 124 (21) ◽  
pp. 11609-11616 ◽  
Author(s):  
M. N. Gjerding ◽  
L. S. R. Cavalcante ◽  
Andrey Chaves ◽  
K. S. Thygesen
Keyword(s):  
Ab Initio ◽  
Van Der Waals ◽  
Ab Initio Modeling ◽  
Dielectric Screening ◽  
Van Der Waals Materials

Ab initio modeling of thermal effects in 2D van der Waals materials

2021 ◽  
Author(s):  
Mathieu Luisier ◽  
Sara Fiore ◽  
Teute Bunjaku ◽  
Jonathan Backman ◽  
Cedric Klinkert ◽  
...  
Keyword(s):  
Ab Initio ◽  
Thermal Effects ◽  
Van Der Waals ◽  
Ab Initio Modeling ◽  
Van Der Waals Materials

scholarly journals Theoretical investigation of the vertical dielectric screening dependence on defects for few-layered van der Waals materials

RSC Advances ◽  
2019 ◽  
Vol 9 (69) ◽  
pp. 40309-40315 ◽  
Author(s):  
Amit Singh ◽  
Seunghan Lee ◽  
Hyeonhu Bae ◽  
Jahyun Koo ◽  
Li Yang ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
Theoretical Investigation ◽  
Van Der Waals ◽  
First Principle ◽  
First Principle Calculations ◽  
Dielectric Screening ◽  
Van Der Waals Materials

First-principle calculations were employed to analyze the effects induced by vacancies of molybdenum (Mo) and sulfur (S) on the dielectric properties of few-layered MoS2.

Structural, thermodynamic, electronic, and magnetic properties of superconducting FeSe-CsCl type: Ab initio searching technique with van der Waals corrections

2021 ◽  
pp. 124708
Author(s):  
Prayoonsak Pluengphon ◽  
Prutthipong Tsuppayakorn-aek ◽  
Burapat Inceesungvorn ◽  
Udomsilp Pinsook ◽  
Thiti Bovornratanaraks
Keyword(s):  
Magnetic Properties ◽  
Ab Initio ◽  
Van Der Waals ◽  
Electronic And Magnetic Properties ◽  
Cscl Type ◽  
Type Ab

Chemical Pressure Boost Record‐High Superconductivity in van der Waals Materials FeSe 1− x S x

2021 ◽  
pp. 2102917
Author(s):  
Ruijin Sun ◽  
Shifeng Jin ◽  
Jun Deng ◽  
Munan Hao ◽  
Xin Zhong ◽  
...  
Keyword(s):  
Van Der Waals ◽  
Chemical Pressure ◽  
Van Der Waals Materials

scholarly journals Carrier-capture-assisted optoelectronics based on van der Waals materials to imitate medicine-acting metaplasticity

2021 ◽  
Vol 5 (1) ◽  
Author(s):  
Qianfan Nie ◽  
Caifang Gao ◽  
Feng-Shou Yang ◽  
Ko-Chun Lee ◽  
Che-Yi Lin ◽  
...  
Keyword(s):  
Weight Change ◽  
Synaptic Weight ◽  
Van Der Waals ◽  
Low Frequency ◽  
Photonic Devices ◽  
Frequency Noise ◽  
Carrier Capture ◽  
Electronic Engineering ◽  
Neural Simulation ◽  
Van Der Waals Materials

AbstractRecently, researchers have focused on optoelectronics based on two-dimensional van der Waals materials to realize multifunctional memory and neuron applications. Layered indium selenide (InSe) semiconductors satisfy various requirements as photosensitive channel materials, and enable the realization of intriguing optoelectronic applications. Herein, we demonstrate InSe photonic devices with different trends of output currents rooted in the carrier capture/release events under various gate voltages. Furthermore, we reported an increasing/flattening/decreasing synaptic weight change index (∆Wn) via a modulated gate electric field, which we use to imitate medicine-acting metaplasticity with effective/stable/ineffective features analogous to the synaptic weight change in the nervous system of the human brain. Finally, we take advantage of the low-frequency noise (LFN) measurements and the energy-band explanation to verify the rationality of carrier capture-assisted optoelectronics applied to neural simulation at the device level. Utilizing optoelectronics to simulate essential biomedical neurobehaviors, we experimentally demonstrate the feasibility and meaningfulness of combining electronic engineering with biomedical neurology.

scholarly journals Intercorrelated ferroelectrics in 2D van der Waals materials

2021 ◽  
Author(s):  
Yan Liang ◽  
Shiying Shen ◽  
Baibiao Huang ◽  
Ying Dai ◽  
Yandong Ma
Keyword(s):  
Van Der Waals ◽  
Out Of Plane ◽  
Fundamental Phenomenon ◽  
Van Der Waals Materials

2D intercorrelated ferroelectrics, exhibiting a coupled in-plane and out-of-plane ferroelectricity, is a fundamental phenomenon in the field of condensed-mater physics. The current research is based on the paradigm of bi-directional...

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