scholarly journals Cover Feature: Alkali Transition‐Metal Molybdates: A Stepwise Approach to Geometrically Frustrated Systems (Chem. Eur. J. 3/2020)

2019 ◽  
Vol 26 (3) ◽  
pp. 567-567
Author(s):  
Tiffany M. Smith Pellizzeri ◽  
Colin D. McMillen ◽  
Joseph W. Kolis
Keyword(s):  
Transition Metal ◽  
Stepwise Approach ◽  
Geometrically Frustrated ◽  
Frustrated Systems

Alkali Transition‐Metal Molybdates: A Stepwise Approach to Geometrically Frustrated Systems

2019 ◽  
Vol 26 (3) ◽  
pp. 597-600 ◽  
Author(s):  
Tiffany M. Smith Pellizzeri ◽  
Colin D. McMillen ◽  
Joseph W. Kolis
Keyword(s):  
Transition Metal ◽  
Stepwise Approach ◽  
Geometrically Frustrated ◽  
Frustrated Systems

scholarly journals Nodal chain semimetal in geometrically frustrated systems

2019 ◽  
Vol 99 (9) ◽  
Author(s):  
Meng Xiao ◽  
Xiao-Qi Sun ◽  
Shanhui Fan
Keyword(s):  
Geometrically Frustrated ◽  
Frustrated Systems

3D geometrically frustrated magnets assembled by transition metal ion and 1,2,3-triazole-4,5-dicarboxylate as triangular nodes

CrystEngComm ◽  
2008 ◽  
Vol 10 (12) ◽  
pp. 1770 ◽  
Author(s):  
Wei-Xiong Zhang ◽  
Wei Xue ◽  
Jian-Bin Lin ◽  
Yan-Zhen Zheng ◽  
Xiao-Ming Chen
Keyword(s):  
Transition Metal ◽  
Metal Ion ◽  
Frustrated Magnets ◽  
Transition Metal Ion ◽  
Geometrically Frustrated

Charge and orbital ordering in transition metal oxides

2002 ◽  
Vol 12 (9) ◽  
pp. 257-257
Author(s):  
D. Khomskii
Keyword(s):  
Transition Metal ◽  
Metal Oxides ◽  
Transition Metal Oxides ◽  
Degrees Of Freedom ◽  
Relative Role ◽  
Strongly Correlated ◽  
Orbital Ordering ◽  
Spin Orbital ◽  
Electron Phonon Interaction ◽  
Frustrated Systems

Transition metal oxides with strongly correlated d-electrons show an astonishing variety of properties. This is largely determined by an interplay of different degrees of freedom: charge, spin, orbital, lattice ones. Often there appear in them various superstructures. In this talk I will consider different types of superstructures in transition metal oxides, especially charge and orbital ordering, willdiscuss the main mechanisms leading to their formation and consider specific examples of superstructures in manganites, cobaltites and in some frustrated systems. Relative role of purely electronic mechanisms and of the electron-phonon interaction will be discussed. In particular, I will show that the elastic interactions can naturally lead to different superstructures, including stripes. Special features of charge and, especially, orbital ordering in frustrated systems, where frustrations may be caused both by the geometric structure of the lattice and by the special features of orbital interactions, will be considered, and it will be shown that the order-from-disorder mechanism can lead to a unique ordered ground state in many of these cases..

More than Four Subtypes of Trimeric Hydrogen Bonds in Hydroxyl Halides

2013 ◽  
Vol 341-342 ◽  
pp. 242-245
Author(s):  
Xiao Dong Liu ◽  
Xu Guang Zheng ◽  
Dong Dong Meng ◽  
Xing Liang Xu
Keyword(s):  
Hydrogen Bond ◽  
Transition Metal ◽  
Hydrogen Bonds ◽  
Raman Spectra ◽  
Physical Investigation ◽  
Space Groups ◽  
Geometrically Frustrated ◽  
Local Lattice ◽  
Symmetric Structures ◽  
Compound Series

Through ten years physical investigation on the geometrically frustrated coordination compound series basic (hydroxyl and deuteroxyl) transition-metal halides M2(OH/D)3X (M=Mn, Fe, Co, Ni and Cu; X=Cl, Br and I), we have determined the existence of four crystal structures, whose space groups belong to Nos. 11, 14, 62 and 166, respectively, in this series till now. After studying their Raman spectra, we firmly believe that a nonnegligible hydrogen bond (H-bond) exists in every material. Considering carefully their local lattice environments of the basic groups, we find a new kind, to the best of our knowledge, of H-bond [(OH)3···M] and nominate it as the trimeric H-bond, and further confirm three types of symmetric structures, which have totally four subtypes of trimeric H-bonds so far. More two subtypes are predicted to exist in nature. This result may provide a new interesting subject for quantum chemists and material physicists.

scholarly journals Magnetic Density of States at Low Energy in Geometrically Frustrated Systems

2005 ◽  
Vol 95 (4) ◽  
Author(s):  
A. Yaouanc ◽  
P. Dalmas de Réotier ◽  
V. Glazkov ◽  
C. Marin ◽  
P. Bonville ◽  
...  
Keyword(s):  
Density Of States ◽  
Low Energy ◽  
Geometrically Frustrated ◽  
Frustrated Systems
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