New family of low-dimensional organic metals based on the asymmetrical multisulfur donor ETEDT-TTF: transport and magnetotransport properties

1999 ◽  
Vol 102 (1-3) ◽  
pp. 1772-1773 ◽  
Author(s):  
V. Laukhin ◽  
E. Ribera ◽  
C. Rovira ◽  
J. Veciana ◽  
M. Gener ◽  
...  
Keyword(s):  
Organic Metals ◽  
New Family ◽  
Low Dimensional

scholarly journals Enhanced Luminescence and Mechanistic Studies on Mn-doped Double Layered Perovskite Phosphors: Cs4Mn1−xCdxBi2Cl12

2020 ◽  
Author(s):  
Brenda Vargas ◽  
Diana T. Reyes-Castillo ◽  
Eduardo Coutino-Gonzalez ◽  
Citlali Sánchez-Aké ◽  
Carlos Ramos ◽  
...  
Keyword(s):  
Magnetic Coupling ◽  
Layered Perovskite ◽  
Great Promise ◽  
New Family ◽  
Halide Perovskites ◽  
Optoelectronic Applications ◽  
The Stability ◽  
Low Dimensional ◽  
Stability Issues ◽  
Mn Doped

Halide perovskites offer great promise for optoelectronic applications, but stability issues continue to hinder its implementation and long-term stability. The stability of all-inorganic halide perovskites and the inherent quantum confinement of low dimensional perovskites can be harnessed to synthesize materials with high PL efficiency. An example of such materials is the recently reported new family of layered double perovskites, Cs4Mn1−xCdxBi2Cl12. Herein, we report a new synthetic procedure that enhances the maximum PLQY of this family materials to up 79.5%, a 20% enhancement from previous reports and the highest reported for a Mn-doped halide perovskite. Importantly, stability tests demonstrate that these materials are very stable towards humidity, UV irradiation, and temperature. Finally, we investigated the photophysics, the effects of magnetic coupling and temperature in the PL efficiency and proposed a mechanism for the emission process. Our results highlight the potential of this family of materials and related layered all-inorganic perovskites for solid-state lighting and optoelectronic applications<p></p>

New Low-Dimensional Iron(II) Phosphates Exhibiting Field-Dependent Magnetization Steps

2006 ◽  
Vol 988 ◽  
Author(s):  
Shiou-Jyh Hwu ◽  
Wendy L. Queen ◽  
Lei Wang ◽  
K. G. Sanjaya Ranmohotti
Keyword(s):  
Three Dimensional ◽  
Solid State Reactions ◽  
Ferromagnetic Transition ◽  
Structure And Property ◽  
Geometrically Frustrated ◽  
New Family ◽  
Field Dependent ◽  
Low Dimensional ◽  
Phosphate System ◽  
Property Characterization

AbstractA new family of transition-metal-containing phosphates ANa3M7(PO4)6, where A = K, Rb, Cs and M = Mn, Fe, Co, was synthesized via high-temperature (650-800 °C), solid state reactions. Sizable single crystals up to 1 cm (ca. 160 mg) were grown for structure and property characterization. The extended structure comprises of alternating corner- and edge-sharing triangular chains of FeOn (n = 5,6) polyhedra involving four crystallographically distinct Fe(II) cations. The triangular chains propagate along the a and b directions to form slabs, which are interlinked by P5+ and a fifth Fe2+ cation to form the three-dimensional lattice. The magnetic susceptibility studies suggest that some of these fascinating compounds exhibit a ferromagnetic transition at temperatures between 10K and 15K. The field-dependent studies on the oriented single crystal of RbNa3M7(PO4)6 show the occurrence of magnetization steps at 2 -5K. In this report, we will first discuss some prior research developments relevant to the study of geometrically frustrated magnetic (GFM) interactions, followed by the results of our exploratory synthesis in the pseuo-quaternary iron(II) phosphate system and finally some initial investigations of temperature- and field-dependent magnetic properties.

Radical Cation Salts - A New Family of Organic Metals

1982 ◽  
Vol 86 (1) ◽  
pp. 103-110 ◽  
Author(s):  
V. Enkelmann ◽  
G. Wegner ◽  
C. Kröhnke
Keyword(s):  
Radical Cation ◽  
Organic Metals ◽  
New Family ◽  
Radical Cation Salts

scholarly journals Enhanced Luminescence and Mechanistic Studies on Mn-doped Double Layered Perovskite Phosphors: Cs4Mn1−xCdxBi2Cl12

2020 ◽  
Author(s):  
Brenda Vargas ◽  
Diana T. Reyes-Castillo ◽  
Eduardo Coutino-Gonzalez ◽  
Citlali Sánchez-Aké ◽  
Carlos Ramos ◽  
...  
Keyword(s):  
Magnetic Coupling ◽  
Layered Perovskite ◽  
Great Promise ◽  
New Family ◽  
Halide Perovskites ◽  
Optoelectronic Applications ◽  
The Stability ◽  
Low Dimensional ◽  
Stability Issues ◽  
Mn Doped

Halide perovskites offer great promise for optoelectronic applications, but stability issues continue to hinder its implementation and long-term stability. The stability of all-inorganic halide perovskites and the inherent quantum confinement of low dimensional perovskites can be harnessed to synthesize materials with high PL efficiency. An example of such materials is the recently reported new family of layered double perovskites, Cs4Mn1−xCdxBi2Cl12. Herein, we report a new synthetic procedure that enhances the maximum PLQY of this family materials to up 79.5%, a 20% enhancement from previous reports and the highest reported for a Mn-doped halide perovskite. Importantly, stability tests demonstrate that these materials are very stable towards humidity, UV irradiation, and temperature. Finally, we investigated the photophysics, the effects of magnetic coupling and temperature in the PL efficiency and proposed a mechanism for the emission process. Our results highlight the potential of this family of materials and related layered all-inorganic perovskites for solid-state lighting and optoelectronic applications<p></p>

PHOSPHATE TUNGSTEN BRONZES — A NEW FAMILY OF QUASI-LOW-DIMENSIONAL METALLIC OXIDES

1993 ◽  
Vol 07 (23n24) ◽  
pp. 3937-3971 ◽  
Author(s):  
MARTHA GREENBLATT
Keyword(s):  
Single Crystals ◽  
Density Wave ◽  
Measurement Data ◽  
X Ray Diffraction ◽  
New Class ◽  
Metallic Oxides ◽  
New Family ◽  
Oxide Bronzes ◽  
Low Dimensional ◽  
Low Dimensional Materials

A brief introduction is presented on transition metal oxide bronzes and their relationship to the phosphate tungsten bronzes; the latter compounds are the major focus of this review. The phosphate tungsten bronzes (PTB) are a new class of quasi-low-dimensional materials which exhibit charge density wave (CDW) instabilities. The growth of single crystals and investigation of the physical properties including the temperature dependence of the electrical resistivity and magnetic susceptibility on oriented single crystals are discussed for selected members of the major families in the PTB’s. Correlation of the physical measurement data with structural properties, X-ray diffraction data and results of the theoretical band structure calculations are also presented.

scholarly journals Comparison of Simulations with a Mean-Field Approach vs. Synthetic Correlated Networks

Symmetry ◽  
2021 ◽  
Vol 13 (1) ◽  
pp. 141
Author(s):  
Maria Letizia Bertotti ◽  
Giovanni Modanese
Keyword(s):  
Mean Field ◽  
Peak Time ◽  
Epidemic Threshold ◽  
Scale Free ◽  
Field Approach ◽  
New Family ◽  
Degree Correlations ◽  
Low Dimensional ◽  
Correlated Networks ◽  
Synthetic Networks

It is well known that dynamical processes on complex networks are influenced by the degree correlations. A common way to take these into account in a mean-field approach is to consider the function knn(k) (average nearest neighbors degree). We re-examine the standard choices of knn for scale-free networks and a new family of functions which is independent from the simple ansatz knn∝kα but still displays a remarkable scale invariance. A rewiring procedure is then used to explicitely construct synthetic networks using the full correlation P(h∣k) from which knn is derived. We consistently find that the knn functions of concrete synthetic networks deviate from ideal assortativity or disassortativity at large k. The consequences of this deviation on a diffusion process (the network Bass diffusion and its peak time) are numerically computed and discussed for some low-dimensional samples. Finally, we check that although the knn functions of the new family have an asymptotic behavior for large networks different from previous estimates, they satisfy the general criterium for the absence of an epidemic threshold.

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