Vertical dielectric screening of few-layer van der Waals semiconductors

Nanoscale ◽  
2017 ◽  
Vol 9 (38) ◽  
pp. 14540-14547 ◽  
Author(s):  
Jahyun Koo ◽  
Shiyuan Gao ◽  
Hoonkyung Lee ◽  
Li Yang
Keyword(s):  
Van Der Waals ◽  
Fundamental Parameter ◽  
Two Dimensional ◽  
2D Semiconductors ◽  
Dielectric Screening

Vertical dielectric screening is a fundamental parameter of few-layer van der Waals two-dimensional (2D) semiconductors.

scholarly journals Van der Waals metal-semiconductor junction: Weak Fermi level pinning enables effective tuning of Schottky barrier

2016 ◽  
Vol 2 (4) ◽  
pp. e1600069 ◽  
Author(s):  
Yuanyue Liu ◽  
Paul Stradins ◽  
Su-Huai Wei
Keyword(s):  
Fermi Level ◽  
Schottky Barrier ◽  
Van Der Waals ◽  
Two Dimensional ◽  
Fermi Level Pinning ◽  
Fundamental Properties ◽  
2D Semiconductors ◽  
Semiconductor Junction ◽  
Device Applications ◽  
Gap States

Two-dimensional (2D) semiconductors have shown great potential for electronic and optoelectronic applications. However, their development is limited by a large Schottky barrier (SB) at the metal-semiconductor junction (MSJ), which is difficult to tune by using conventional metals because of the effect of strong Fermi level pinning (FLP). We show that this problem can be overcome by using 2D metals, which are bounded with 2D semiconductors through van der Waals (vdW) interactions. This success relies on a weak FLP at the vdW MSJ, which is attributed to the suppression of metal-induced gap states. Consequently, the SB becomes tunable and can vanish with proper 2D metals (for example, H-NbS2). This work not only offers new insights into the fundamental properties of heterojunctions but also uncovers the great potential of 2D metals for device applications.

First principles study on the electronic structures and contact properties of graphene/XC (X = P, As, Sb, Bi) van der Waals heterostructures

2021 ◽  
Author(s):  
Xuemin Hu ◽  
Wenqiang Liu ◽  
Jialin Yang ◽  
Shengli Zhang ◽  
Yuanfeng Ye
Keyword(s):  
First Principles ◽  
Electronic Structures ◽  
Van Der Waals ◽  
Electrical Contacts ◽  
Device Performance ◽  
Two Dimensional ◽  
Metal Electrodes ◽  
Van Der Waals Heterostructures ◽  
First Principles Study ◽  
2D Semiconductors

The electrical contacts at the van der Waals (vdW) interface between two-dimensional (2D) semiconductors and metal electrodes could dramatically affect the device performance. Herein, we construct a series of graphene...

Two-dimensional topological insulators exfoliated from Na3Bi-like Dirac semimetals

2021 ◽  
Author(s):  
Xiaoqiu Guo ◽  
Ruixin Yu ◽  
Jingwen Jiang ◽  
Zhuang Ma ◽  
Xiuwen Zhang
Keyword(s):  
Physical Properties ◽  
Epitaxial Growth ◽  
Topological Insulators ◽  
2D Materials ◽  
Van Der Waals ◽  
Two Dimensional ◽  
Dirac Semimetals

Topological insulation is widely predicted in two-dimensional (2D) materials realized by epitaxial growth or van der Waals (vdW) exfoliation. Such 2D topological insulators (TI’s) host many interesting physical properties such...

scholarly journals High performance self-powered photodetector based on 1D Te-2D WS2 mixed-dimensional heterostructure

2021 ◽  
Author(s):  
Lixiang Han ◽  
Mengmeng Yang ◽  
Peiting Wen ◽  
Wei Gao ◽  
nengjie huo ◽  
...  
Keyword(s):  
High Performance ◽  
Van Der Waals ◽  
Sharp Interface ◽  
Two Dimensional ◽  
High Quality ◽  
One Dimensional ◽  
Self Powered

One dimensional (1D)-two dimensional (2D) van der Waals (vdWs) mixed-dimensional heterostructures with advantages of atomically sharp interface, high quality and good compatibility have attracted tremendous attention in recent years. The...

Biaxial strain, electric field and interlayer distance-tailored electronic structure and magnetic properties of two-dimensional g-C3N4/Li-adsorbed Cr2Ge2Te6 van der Waals heterostructures

2021 ◽  
Vol 23 (10) ◽  
pp. 6171-6181
Author(s):  
Yaoqi Gao ◽  
Baozeng Zhou ◽  
Xiaocha Wang
Keyword(s):  
Magnetic Properties ◽  
Electronic Structure ◽  
Electric Field ◽  
Van Der Waals ◽  
Interlayer Distance ◽  
Two Dimensional ◽  
Biaxial Strain ◽  
Van Der Waals Heterostructures

It is found that the biaxial strain, electric field and interlayer distance can effectively modulate the electronic structure and magnetic properties of two-dimensional van der Waals heterostructures.

scholarly journals Superconducting contact and quantum interference between two-dimensional van der Waals and three-dimensional conventional superconductors

2021 ◽  
Vol 5 (1) ◽  
Author(s):  
Michael R. Sinko ◽  
Sergio C. de la Barrera ◽  
Olivia Lanes ◽  
Kenji Watanabe ◽  
Takashi Taniguchi ◽  
...  
Keyword(s):  
Quantum Interference ◽  
Van Der Waals ◽  
Three Dimensional ◽  
Two Dimensional

scholarly journals Van der Waals electride: Toward intrinsic two-dimensional ferromagnetism of spin-polarized anionic electrons

2021 ◽  
pp. 100473
Author(s):  
Hyun Yong Song ◽  
Byung Il Yoo ◽  
Jin-Ho Choi ◽  
Se-Hwang Kang ◽  
Joonho Bang ◽  
...  
Keyword(s):  
Van Der Waals ◽  
Two Dimensional ◽  
Spin Polarized
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