Dynamics of Defects in van der Waals Epitaxy of Bismuth Telluride Topological Insulators

2019 ◽  
Vol 123 (40) ◽  
pp. 24818-24825 ◽  
Author(s):  
Sérgio L. Morelhão ◽  
Stefan W. Kycia ◽  
Samuel Netzke ◽  
Celso I. Fornari ◽  
Paulo H. O. Rappl ◽  
...  
Keyword(s):  
Bismuth Telluride ◽  
Topological Insulators ◽  
Van Der Waals

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...

Dirac Surface Plasmons in Photoexcited Bismuth Telluride Nanowires : Optical Pump-Terahertz Probe Spectroscopy

Nanoscale ◽  
2021 ◽  
Author(s):  
Mithun K P ◽  
Srabani Kar ◽  
Abinash Kumar ◽  
Victor Suvisesha Muthu Dharmaraj ◽  
Ravishankar Narayanan ◽  
...  
Keyword(s):  
Surface Plasmons ◽  
Bismuth Telluride ◽  
Topological Insulators ◽  
Collective Excitation ◽  
Optical Pump ◽  
Time Resolved ◽  
Mid Infrared ◽  
Plasmonic Materials ◽  
Probe Spectroscopy

Collective excitation of Dirac plasmons in graphene and topological insulators have opened new possibilities of tunable plasmonic materials ranging from THz to mid-infrared regions. Using time resolved Optical Pump -...

scholarly journals Chalcogenide van der Waals superlattices: a case example of interfacial phase-change memory

2019 ◽  
Vol 91 (11) ◽  
pp. 1777-1786 ◽  
Author(s):  
Yuta Saito ◽  
Paul Fons ◽  
Kirill V. Mitrofanov ◽  
Kotaro Makino ◽  
Junji Tominaga ◽  
...  
Keyword(s):  
Transition Metal ◽  
Phase Change ◽  
Topological Insulators ◽  
Van Der Waals ◽  
Transition Metal Dichalcogenides ◽  
Phase Change Memory ◽  
Interfacial Phase ◽  
Metal Dichalcogenides ◽  
Superlattice Structures ◽  
Change Memory

Abstract 2D van der Waals chalcogenides such as topological insulators and transition-metal dichalcogenides and their heterostructures are now at the forefront of semiconductor research. In this paper, we discuss the fundamental features and advantages of van der Waals bonded superlattices over conventional superlattices made of 3D materials and describe in more detail one practical example, namely, interfacial phase change memory based on GeTe–Sb2Te3 superlattice structures.

scholarly journals Unraveling the dislocation core structure at a van der Waals gap in bismuth telluride

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
D. L. Medlin ◽  
N. Yang ◽  
C. D. Spataru ◽  
L. M. Hale ◽  
Y. Mishin
Keyword(s):  
Bismuth Telluride ◽  
Van Der Waals ◽  
Dislocation Core ◽  
Core Structure ◽  
Dislocation Core Structure

Thermomechanical Characterization of Bismuth Telluride Based Thermoelectric Materials

2001 ◽  
Vol 691 ◽  
Author(s):  
Witold Brostow ◽  
Kevin P. Menard ◽  
John B. White
Keyword(s):  
Bismuth Telluride ◽  
Van Der Waals ◽  
Mechanical Analysis ◽  
Thermomechanical Properties ◽  
Thermal Transitions ◽  
Scanning Calorimetry ◽  
Direction Parallel ◽  
Crystalline Polymers ◽  
Structural Metals ◽  
P Type

ABSTRACTThe thermoelectric properties of bismuth telluride based thermoelectric (TE) materials are well-characterized, but comparatively little has been published on the mechanical and thermomechanical properties of these materials. In this paper, we present the initial dynamic mechanical analysis (DMA) data for n-type and p-type bismuth telluride based TE materials. The materials' tan δ values, indicative of viscoelastic energy dissipation modes, approach that of glassy or crystalline polymers and are greater than ten times the tan delta of structural metals. TE samples measured perpendicular to the van der Waals planes have higher tan δ values. Thermal scans in the DMA compressive mode showed changes in mechanical properties versus temperature with clear hysteresis effects. These changes were correlated to differential scanning calorimetry (DSC) thermal transitions. The expected anisotropy was shown in flexural 3-point bending results for one n-type material that showed a storage modulus of 0.10 to 0.45 GPa in the direction parallel to the van der Waals planes and 0.07 to 0.2 GPa in the perpendicular direction.

On the morphology of the interlayer surface and micro-Raman spectra of layered films in topological insulators based on bismuth telluride

2017 ◽  
Vol 51 (6) ◽  
pp. 729-731
Author(s):  
L. N. Lukyanova ◽  
A. Yu. Bibik ◽  
V. A. Aseev ◽  
O. A. Usov ◽  
I. V. Makarenko ◽  
...  
Keyword(s):  
Raman Spectra ◽  
Bismuth Telluride ◽  
Topological Insulators

scholarly journals Versatile Large-Area Custom-Feature van der Waals Epitaxy of Topological Insulators

ACS Nano ◽  
2017 ◽  
Vol 11 (7) ◽  
pp. 7457-7467 ◽  
Author(s):  
Tanuj Trivedi ◽  
Anupam Roy ◽  
Hema C. P. Movva ◽  
Emily S. Walker ◽  
Seth R. Bank ◽  
...  
Keyword(s):  
Topological Insulators ◽  
Van Der Waals ◽  
Large Area

Elastic properties of van der Waals epitaxy grown bismuth telluride 2D nanosheets

Nanoscale ◽  
2015 ◽  
Vol 7 (28) ◽  
pp. 11915-11921 ◽  
Author(s):  
Lingling Guo ◽  
Haoming Yan ◽  
Quentarius Moore ◽  
Michael Buettner ◽  
Jinhui Song ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Young’S Modulus ◽  
Elastic Properties ◽  
Bismuth Telluride ◽  
Young's Modulus ◽  
Van Der Waals ◽  
2D Nanosheets

Mechanical properties of Bi2Te3 2D nanosheets (5–14 QLs) were investigated and the Young's modulus (18.7 ± 7.0 GPa) was found to be much less than that of bulk Bi2Te3.

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