Intercompartmental Electron Exchange in Geometrically-Constrained Ru−Os Triads Built around Diethynylated Aryl Hydrocarbons

2000 ◽  
Vol 104 (33) ◽  
pp. 7906-7915 ◽  
Author(s):  
Abdelkrim El-ghayoury ◽  
Anthony Harriman ◽  
Raymond Ziessel
Keyword(s):  
Electron Exchange ◽  
Aryl Hydrocarbons ◽  
Geometrically Constrained

Two-electron exchange interaction in the quasimolecular systems with long-range dipole potential

2015 ◽  
Vol 38 (0) ◽  
pp. 45-55
Author(s):  
О. Мирославович Карбованець ◽  
Мирослав Іванович Карбованець ◽  
Володимир Юрійович Лазур ◽  
М. В. Хома
Keyword(s):  
Exchange Interaction ◽  
Long Range ◽  
Electron Exchange ◽  
Dipole Potential ◽  
Electron Exchange Interaction

scholarly journals Methylation of geometrically constrained lysine analogues by histone lysine methyltransferases

2020 ◽  
Vol 56 (20) ◽  
pp. 3039-3042 ◽  
Author(s):  
Abbas H. K. Al Temimi ◽  
Paul B. White ◽  
Marcus J. M. Mulders ◽  
Nicole G. A. van der Linden ◽  
Richard H. Blaauw ◽  
...  
Keyword(s):  
Substrate Specificity ◽  
Histone Lysine ◽  
Lysine Methyltransferases ◽  
Geometrically Constrained ◽  
Histone Lysine Methyltransferases

Histone lysine methyltransferases (KMTs) exhibit substrate specificity for lysine and its geometrically constrained mimics.

scholarly journals Magnetisation Processes in Geometrically Frustrated Spin Networks with Self-Assembled Cliques

Entropy ◽  
2020 ◽  
Vol 22 (3) ◽  
pp. 336 ◽  
Author(s):  
Bosiljka Tadić ◽  
Miroslav Andjelković ◽  
Milovan Šuvakov ◽  
Geoff J. Rodgers
Keyword(s):  
Domain Walls ◽  
Spin Dynamics ◽  
Higher Order ◽  
Spin Networks ◽  
Graph Theoretic ◽  
Geometrically Frustrated ◽  
Geometric Frustration ◽  
Antiferromagnetic Materials ◽  
Geometrically Constrained ◽  
Ferromagnetic Interactions

Functional designs of nanostructured materials seek to exploit the potential of complex morphologies and disorder. In this context, the spin dynamics in disordered antiferromagnetic materials present a significant challenge due to induced geometric frustration. Here we analyse the processes of magnetisation reversal driven by an external field in generalised spin networks with higher-order connectivity and antiferromagnetic defects. Using the model in (Tadić et al. Arxiv:1912.02433), we grow nanonetworks with geometrically constrained self-assemblies of simplexes (cliques) of a given size n, and with probability p each simplex possesses a defect edge affecting its binding, leading to a tree-like pattern of defects. The Ising spins are attached to vertices and have ferromagnetic interactions, while antiferromagnetic couplings apply between pairs of spins along each defect edge. Thus, a defect edge induces n − 2 frustrated triangles per n-clique participating in a larger-scale complex. We determine several topological, entropic, and graph-theoretic measures to characterise the structures of these assemblies. Further, we show how the sizes of simplexes building the aggregates with a given pattern of defects affects the magnetisation curves, the length of the domain walls and the shape of the hysteresis loop. The hysteresis shows a sequence of plateaus of fractional magnetisation and multiscale fluctuations in the passage between them. For fully antiferromagnetic interactions, the loop splits into two parts only in mono-disperse assemblies of cliques consisting of an odd number of vertices n. At the same time, remnant magnetisation occurs when n is even, and in poly-disperse assemblies of cliques in the range n ∈ [ 2 , 10 ] . These results shed light on spin dynamics in complex nanomagnetic assemblies in which geometric frustration arises in the interplay of higher-order connectivity and antiferromagnetic interactions.

Electron-Exchange Processes in the Excitations of NiO(100) SurfacedStates

1996 ◽  
Vol 77 (8) ◽  
pp. 1548-1551 ◽  
Author(s):  
B. Fromme ◽  
M. Möller ◽  
Th. Anschütz ◽  
C. Bethke ◽  
E. Kisker
Keyword(s):  
Electron Exchange ◽  
Exchange Processes

Mössbauer Study of Two-Electron Exchange between Neutral and Ionized Tin Donor Centers in Solid Solutions on the Basis of PbS and PbSe

1985 ◽  
Vol 130 (2) ◽  
pp. 727-735 ◽  
Author(s):  
F. S. Nasredinov ◽  
L. V. Prokofieva ◽  
P. P. Seregin ◽  
S. V. Zarubo ◽  
A. V. Ermolaev ◽  
...  
Keyword(s):  
Solid Solutions ◽  
Electron Exchange ◽  
Mössbauer Study
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