scholarly journals Out-of-plane corrugations in graphene based van der Waals heterostructures

2020 ◽  
Vol 102 (19) ◽  
Author(s):  
Simon Zihlmann ◽  
Péter Makk ◽  
Mirko K. Rehmann ◽  
Lujun Wang ◽  
Máté Kedves ◽  
...  
Keyword(s):  
Van Der Waals ◽  
Van Der Waals Heterostructures ◽  
Out Of Plane

scholarly journals Exceptional in-plane and interfacial thermal transport in graphene/2D-SiC van der Waals heterostructures

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Md. Sherajul Islam ◽  
Imon Mia ◽  
Shihab Ahammed ◽  
Catherine Stampfl ◽  
Jeongwon Park
Keyword(s):  
Thermal Conductivity ◽  
Heat Conduction ◽  
Van Der Waals ◽  
New Physics ◽  
Infinite Length ◽  
Interatomic Potentials ◽  
Van Der Waals Heterostructures ◽  
Functional Efficiency ◽  
Out Of Plane ◽  
The Impact

AbstractGraphene based van der Waals heterostructures (vdWHs) have gained substantial interest recently due to their unique electrical and optical characteristics as well as unprecedented opportunities to explore new physics and revolutionary design of nanodevices. However, the heat conduction performance of these vdWHs holds a crucial role in deciding their functional efficiency. In-plane and out-of-plane thermal conduction phenomena in graphene/2D-SiC vdWHs were studied using reverse non-equilibrium molecular dynamics simulations and the transient pump-probe technique, respectively. At room temperature, we determined an in-plane thermal conductivity of ~ 1452 W/m-K for an infinite length graphene/2D-SiC vdWH, which is superior to any graphene based vdWHs reported yet. The out-of-plane thermal resistance of graphene → 2D-SiC and 2D-SiC → graphene was estimated to be 2.71 × 10−7 km2/W and 2.65 × 10−7 km2/W, respectively, implying the absence of the thermal rectification effect in the heterobilayer. The phonon-mediated both in-plane and out-of-plane heat transfer is clarified for this prospective heterobilayer. This study furthermore explored the impact of various interatomic potentials on the thermal conductivity of the heterobilayer. These findings are useful in explaining the heat conduction at the interfaces in graphene/2D-SiC vdWH and may provide a guideline for efficient design and regulation of their thermal characteristics.

scholarly journals Out-of-Plane Transport of 1T-TaS2/Graphene-Based van der Waals Heterostructures

ACS Nano ◽  
2021 ◽  
Author(s):  
Carla Boix-Constant ◽  
Samuel Mañas-Valero ◽  
Rosa Córdoba ◽  
José J. Baldoví ◽  
Ángel Rubio ◽  
...  
Keyword(s):  
Van Der Waals ◽  
Van Der Waals Heterostructures ◽  
Out Of Plane

scholarly journals Convergent beam electron holography for analysis of van der Waals heterostructures

2018 ◽  
Vol 115 (29) ◽  
pp. 7473-7478 ◽  
Author(s):  
Tatiana Latychevskaia ◽  
Colin Robert Woods ◽  
Yi Bo Wang ◽  
Matthew Holwill ◽  
Eric Prestat ◽  
...  
Keyword(s):  
Van Der Waals ◽  
3D Structure ◽  
Quantitative Information ◽  
Electron Holography ◽  
Van Der Waals Heterostructures ◽  
Beam Electron ◽  
Stacking Order ◽  
Out Of Plane ◽  
Diffraction Patterns ◽  
Convergent Beam

The van der Waals heterostructures, which explore the synergetic properties of 2D materials when assembled into 3D stacks, have already brought to life a number of exciting phenomena and electronic devices. Still, the interaction between the layers in such assembly, possible surface reconstruction, and intrinsic and extrinsic defects are very difficult to characterize by any method, because of the single-atomic nature of the crystals involved. Here we present a convergent beam electron holographic technique which allows imaging of the stacking order in such heterostructures. Based on the interference of electron waves scattered on different crystals in the stack, this approach allows one to reconstruct the relative rotation, stretching, and out-of-plane corrugation of the layers with atomic precision. Being holographic in nature, our approach allows extraction of quantitative information about the 3D structure of the typical defects from a single image covering thousands of square nanometers. Furthermore, qualitative information about the defects in the stack can be extracted from the convergent diffraction patterns even without reconstruction, simply by comparing the patterns in different diffraction spots. We expect that convergent beam electron holography will be widely used to study the properties of van der Waals heterostructures.

Superhigh out-of-plane piezoelectricity, low thermal conductivity and photocatalytic abilities in ultrathin 2D van der Waals heterostructures of boron monophosphide and gallium nitride

Nanoscale ◽  
2019 ◽  
Vol 11 (45) ◽  
pp. 21880-21890 ◽  
Author(s):  
Manish Kumar Mohanta ◽  
Ashima Rawat ◽  
Dimple Dimple ◽  
Nityasagar Jena ◽  
Raihan Ahammed ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Gallium Nitride ◽  
Energy Conversion ◽  
Van Der Waals ◽  
Van Der Waals Heterostructures ◽  
Low Thermal Conductivity ◽  
Out Of Plane

A stable 2D van der Waals (vdW) heterobilayer constituted by boron monophosphide (BP) and Gallium Nitride (GaN) monolayers for different kinds of energy conversion and nanoelectronics.

scholarly journals In situ nanoscale imaging of moiré superlattices in twisted van der Waals heterostructures

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Yue Luo ◽  
Rebecca Engelke ◽  
Marios Mattheakis ◽  
Michele Tamagnone ◽  
Stephen Carr ◽  
...  
Keyword(s):  
Van Der Waals ◽  
Van Der Waals Heterostructures ◽  
Nanoscale Imaging

scholarly journals Light Absorption and Emission Dominated by Trions in the Type-I van der Waals Heterostructures

ACS Photonics ◽  
2021 ◽  
Author(s):  
Hyemin Bae ◽  
Suk Hyun Kim ◽  
Seungmin Lee ◽  
Minji Noh ◽  
Ouri Karni ◽  
...  
Keyword(s):  
Light Absorption ◽  
Van Der Waals ◽  
Type I ◽  
Van Der Waals Heterostructures ◽  
Absorption And Emission
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