scholarly journals Atom-surface van der Waals potentials of topological insulators and semimetals from scattering measurements

2020 ◽  
Author(s):  
Anton Tamtögl ◽  
Adrian Ruckhofer ◽  
Davide Campi ◽  
Bill Allison ◽  
Wolfgang E Ernst
Keyword(s):  
Topological Insulators ◽  
Van Der Waals ◽  
Resonant Scattering ◽  
Experimental Information ◽  
Scattering Measurements ◽  
Atomic Beams

The phenomenology of resonant scattering has been known since the earliest experiments upon scattering of atomic beams from surfaces and is a means of obtaining experimental information about the fundamentals...

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 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 The identification of $${{\varvec{\alpha }}}$$-clustered doorway states in $$^{44,48,52}$$Ti using machine learning

2021 ◽  
Vol 57 (3) ◽  
Author(s):  
Sam Bailey ◽  
Tzany Kokalova ◽  
Martin Freer ◽  
Carl Wheldon ◽  
Robin Smith ◽  
...  
Keyword(s):  
Machine Learning ◽  
Wavelet Transform ◽  
Continuous Wavelet Transform ◽  
Experimental Analysis ◽  
Cluster Structure ◽  
Resonant Scattering ◽  
State Density ◽  
Continuous Wavelet ◽  
Analysis Method ◽  
Scattering Measurements

AbstractA novel experimental analysis method has been developed, making use of the continuous wavelet transform and machine learning to rapidly identify $$\alpha $$ α -clustering in nuclei in regions of high nuclear state density. This technique was applied to resonant scattering measurements of the $$^\text {4}$$ 4 He($$^\text {40,44,48}$$ 40,44,48 Ca,$$\alpha $$ α ) resonant reactions, allowing the $$\alpha $$ α -cluster structure of $$^\text {44,48,52}$$ 44,48,52 Ti to be investigated. Fragmented $$\alpha $$ α -clustering was identified in $$^\text {44}$$ 44 Ti and $$^\text {52}$$ 52 Ti, while the results for $$^\text {48}$$ 48 Ti were less conclusive, but suggest no such clustering.

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

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

The resonant scattering of gamma radiation from lead isotopes

1978 ◽  
Vol 56 (8) ◽  
pp. 1021-1036 ◽  
Author(s):  
J. W. Knowles ◽  
A. M. Khan ◽  
W. F. Mills
Keyword(s):  
Gamma Radiation ◽  
Compton Scattering ◽  
Scattered Radiation ◽  
Lead Isotopes ◽  
Resonant Scattering ◽  
Aluminum Plate ◽  
Γ Radiation ◽  
Energy Beam ◽  
Scattering Measurements ◽  
Variable Energy

The scattering of gamma radiation from different isotopic mixtures of lead has been measured between 4.7 and 8.3 MeV with a variable energy beam with 175 keV resolution obtained by Compton scattering (n,γ) radiation of nickel from a curved aluminum plate. The elastically scattered radiation was detected with a 12.5 cm diameter, 12.5 cm long NaI(Tl) and with 27 or 49 cm3 Ge(Li) detectors located at scattering angles of 135° and 90°, respectively. Relative scattering measurements from targets of natural lead, radio-lead, and lead enriched in 208Pb show that the most prominent peaks of natural lead are in 208Pb at 7332.6 ± 1.3, 7087.7 ± 4.6, 7064.4 ± 3.5, 6721.0 ± 1.8, 5507.6 ± 1.8, 5292.6 ± 3.3, 4836.5 ± 4.6 keV. Measurements of resonant scattering and resonant self-absorption of the more intense scattered radiations provide information on level widths.

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