Grain-boundary topological phase transitions

Author: qvei

August undefined, 2024

WebMar 28, 2024 · We study the electronic properties of a new planar carbon crystal formed through networking biphenylene molecules. Novel electronic features among carbon materials such as zone-center saddle point and peculiar type-II Dirac fermionic states are shown to exist in the low-energy electronic spectrum. The type-II state here has a nearly … Webtopological phase transition. This phase transition corresponds to the screening of the long-range interactions between (and unbinding of) disconnections. This phase …

Phase transitions in 2D materials Nature Reviews …

WebJun 24, 2024 · Direct experimental observations reveal that grain boundaries in aluminium oxide migrate by a chain of structural phase transformations within the boundary core. Most crystalline materials are ... WebMay 21, 2024 · The scaled conductivity curves for AHR display the presence of two different conduction processes with dissimilar activation energies in the grain boundary and the grain regimes. It was thus concluded that a single scaling parameter is insufficient to satisfy the time temperature superposition principle universally when two different thermally ... dr grazi brooklyn

Grain Boundary Mobility Tensor And Topological Phase …

WebSep 15, 2024 · The challenge with this approach is accounting for both anisotropic grain boundary properties and the topological transitions that occur when a grain face disappears. Phase-field models, by contrast, naturally account for these topological transitions by employing a diffuse interface representation of the boundary [8] . WebDec 14, 2024 · The formation and migration of disconnections (line defects constrained to the grain boundary [GB] plane with both dislocation and step character) control many of … WebWe analyze this KT transition through mean-field theory, renormalization group theory, and kinetic Monte Carlo simulations and examine how this transition affects microstructure … dr grazulis

Topological structures of transition metal ... - Wiley Online Library

Frontiers Topological Phase Transitions and Evolution of Boundary …

WebJan 15, 2024 · Topological phase transitions represent a new class of quantum critical phenomena. Although they cannot be described within the usual framework of Landau theory, one can still identify a diverging length and time at these transitions, which make them amenable to a scaling approach. WebGrain boundary motion can be driven by a chemical potential that jumps across a GB or by shear applied parallel to the GB plane; the driving force has three components. Hence, the GB mobility must be a tensor (the off-diagonal components indicate shear coupling). rak neurolog jasłoWebDec 1, 2024 · The topological evolution and annihilation mechanism of the three-, four- and five-sided grains are studied by using the phase field crystal (PFC) model. Both the large-angle and small-angle grain boundaries are discussed during … dr grazina riverhead

"WebMar 8, 2024 · For boundary topological phase transitions, we find that the Zeeman field can change the time-reversal invariant SOTIs to time-reversal symmetry breaking SOTIs, accompanying with the change of the number of robust corner or hinge states. " - Grain-boundary topological phase transitions

Grain-boundary topological phase transitions

Phases at the interface Nature Materials

WebDec 29, 2024 · strained to the grain boundary [GB] plane with both dislocation and step character) control many of the kinetic and dynamical properties of GBs and the … WebMar 18, 2024 · The theory of grain boundary (the interface between crystallites, GB) structure has a long history 1 and the concept of GBs undergoing phase transformations …

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WebApr 5, 2024 · When a condensed matter system undergoes a phase transition associated with spontaneous symmetry-breaking from a high-temperature (T) high-symmetry state to a low-T low-symmetry state with multiple degenerate domains, it is well believed that a huge number of domains (or nuclei) will be generated at the early stage of transition, … WebDec 29, 2024 · Significance We reveal the existence of a topological phase transition (Kosterlitz–Thouless type) in grain boundaries (GBs)—important internal surfaces in …

WebMay 5, 2024 · 1 Introduction . Omnipresent throughout a vast range of chemical and physical systems, 1–12 topological defects play a central role in characterizing collective ordering phenomena. As one of the default systems for investigating such ordering phenomena, liquid crystals 13 have been enjoying continuous attention within the … WebDec 1, 2024 · Grain boundary (GB) segregation ( a.k.a. adsorption in thermodynamics) is an important phenomenon for materials science because it can critically influence microstructural evolution and a broad range of materials properties [ 1, 2 ]. Over decades, several classical statistical thermodynamic models have been developed.

Webstrained to the grain boundary [GB] plane with both dislocation and step character) control many of the kinetic and dynamical properties of GBs and the polycrystalline materials of which they are central constituents. We demonstrate that GBs undergo a ﬁnite-temperature topological phase transition of the Kosterlitz– Thouless (KT) type. WebCo-locate to Equinix Washington D.C., a strategic global business hub. Learn about Equinix DC15 carrier-neutral data center, located at 44780 Performance Circle, Ashburn, VA. …

WebApr 9, 2024 · Phase transitions in 2D materials. Wenbin Li, Xiaofeng Qian &. Ju Li. Nature Reviews Materials 6 , 829–846 ( 2024) Cite this article. 13k Accesses. 101 Citations. 6 Altmetric.

WebNov 9, 2024 · Phase 1 of the Silver Line opened in 2014. It extended Metrorail service from East Falls Church to the eastern edge of Reston. Abigail Constantino started her … dr grba urologWebJan 1, 2024 · The grain boundary (GB) mobility relates the GB velocity to the driving force. While the GB velocity is normally associated with motion of the GB normal to the GB plane, there is often a... dr graziosa bronxWebDec 1, 2024 · The results show that the topological transformation achieves a self-similar state with the grain size and the number of sides (faces) distributed in each grain, indicating that grains cannot grow without the so-called topological transformation. dr grazioli bielWebNov 2, 2024 · We demonstrate that GBs undergo a finite-temperature topological phase transition of the Kosterlitz-Thouless (KT) type. This phase transition corresponds to … dr grazi obgyn brooklynWebDec 29, 2024 · We analyze this KT transition through mean-field theory, renormalization group theory, and kinetic Monte Carlo simulations and examine how this transition … rak norWebJul 29, 2024 · Non-Hermiticity can vary the topology of system, induce topological phase transitions, and even invalidate the conventional bulk-boundary correspondence. Here, we show the introduction of non-Hermiticity without affecting the topological properties of the original chiral symmetric Hermitian systems. Conventional bulk-boundary … ra knipferWebSep 15, 2024 · The grain boundary phase junction surrounding the GB phase nucleus is of the same type as that considered in Fig. 3. ... Grain-boundary topological phase transitions. Proc. Natl. Acad. Sci., 117 (52) (2024), pp. 33077-33083, 10.1073/pnas.2024390117. View in Scopus Google Scholar dr grazioli