scholarly journals Theory of charge order and heavy-electron formation in the mixed-valence compound KNi2Se2

2013 ◽  
Vol 87 (8) ◽  
Author(s):  
James M. Murray ◽  
Zlatko Tešanović
Keyword(s):  
Mixed Valence ◽  
Charge Order ◽  
Heavy Electron ◽  
Mixed Valence Compound

scholarly journals Transport anomalies in the layered compound BaPt4Se6

2021 ◽  
Vol 6 (1) ◽  
Author(s):  
Sheng Li ◽  
Yichen Zhang ◽  
Hanlin Wu ◽  
Huifei Zhai ◽  
Wenhao Liu ◽  
...  
Keyword(s):  
Electrical Transport ◽  
Mixed Valence ◽  
Charge Order ◽  
Honeycomb Structure ◽  
Layered Compound ◽  
Metallic State ◽  
Angle Resolved Photoemission Spectroscopy ◽  
Dirac Semimetal ◽  
Mixed Valence Compound ◽  
Heat Capacity Measurements

AbstractWe report a layered ternary selenide BaPt4Se6 featuring sesqui-selenide Pt2Se3 layers sandwiched by Ba atoms. The Pt2Se3 layers in this compound can be derived from the Dirac-semimetal PtSe2 phase with Se vacancies that form a honeycomb structure. This structure results in a Pt (VI) and Pt (II) mixed-valence compound with both PtSe6 octahedra and PtSe4 square net coordination configurations. Temperature-dependent electrical transport measurements suggest two distinct anomalies: a resistivity crossover, mimic to the metal-insulator (M-I) transition at ~150 K, and a resistivity plateau at temperatures below 10 K. The resistivity crossover is not associated with any structural, magnetic, or charge order modulated phase transitions. Magnetoresistivity, Hall, and heat capacity measurements concurrently suggest an existing hidden state below 5 K in this system. Angle-resolved photoemission spectroscopy measurements reveal a metallic state and no dramatic reconstruction of the electronic structure up to 200 K.

Comment on “Pressure-induced structural and valence transition in AgO” by C. Hou, J. Botana, X. Zhang, X. Wang and M. Miao, Phys. Chem. Chem. Phys., 2016, 18, 15322

2016 ◽  
Vol 18 (46) ◽  
pp. 31973-31974 ◽  
Author(s):  
Mariana Derzsi ◽  
Wojciech Grochala
Keyword(s):  
Electronic Structure ◽  
Recent Article ◽  
Theoretical Study ◽  
Mixed Valence ◽  
Chem Phys ◽  
External Pressure ◽  
Valence Transition ◽  
Mixed Valence Compound ◽  
Phys Chem Chem Phys

The recent article by Hou et al. has focused on a theoretical study of mixed valence compound AgO in order to elucidate the nature of the electronic structure of this system as a function of external pressure.

Singlet carbenes as mimics for transition metals: synthesis of an air stable organic mixed valence compound [M2(C2)+˙; M = cyclic(alkyl)(amino)carbene]

2014 ◽  
Vol 1 (4) ◽  
pp. 351-354 ◽  
Author(s):  
Liqun Jin ◽  
Mohand Melaimi ◽  
Liu Liu ◽  
Guy Bertrand
Keyword(s):  
Transition Metals ◽  
Radical Cation ◽  
Mixed Valence ◽  
Ethynyl Radical ◽  
Mixed Valence Compound ◽  
Singlet Carbenes

A bis-carbene-stabilized ethynyl radical cation, a purely organic mixed valence compound, is indefinitely air stable.

Crystal structure and properties of a new mixed-valence compound LiMn2TeO6 and the survey of the LiMM′XO6 family (X = Sb or Te)

2011 ◽  
Vol 13 (11) ◽  
pp. 1931-1937 ◽  
Author(s):  
A.A. Pospelov ◽  
V.B. Nalbandyan ◽  
E.I. Serikova ◽  
B.S. Medvedev ◽  
M.A. Evstigneeva ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Mixed Valence ◽  
Structure And Properties ◽  
Mixed Valence Compound

Effect of pressure on resistivity and Mössbauer spectra of the mixed valence compound Sn2S3

1979 ◽  
Vol 70 (11) ◽  
pp. 4837-4842 ◽  
Author(s):  
G. Amthauer ◽  
J. Fenner ◽  
S. Hafner ◽  
W. B. Holzapfel ◽  
R. Keller
Keyword(s):  
Mössbauer Spectra ◽  
Mixed Valence ◽  
Effect Of Pressure ◽  
Mossbauer Spectra ◽  
Mixed Valence Compound

Die neuen Oxobismutate(III) Cs6Bi4O9, K9Bi5O13 und A2Bi4O7 (A = Rb, Cs) / The New Oxobismutates(III) Cs6Bi4O9, K9Bi5O13 and A2Bi4O7 (A = Rb, Cs)

2002 ◽  
Vol 57 (10) ◽  
pp. 1090-1100
Author(s):  
Franziska Emmerling ◽  
Caroline Röhr
Keyword(s):  
Single Crystal ◽  
Crystal Structures ◽  
Alkali Metals ◽  
Mixed Valence ◽  
Three Dimensional ◽  
X Ray Diffraction ◽  
X Ray ◽  
Trigonal Bipyramidal ◽  
Mixed Valence Compound

AbstractThe title compounds were synthesized at a temperature of 700 °C via oxidation of elemental Bi with the hyperoxides AO2 or via reaction of the elemental alkali metals A with Bi2O3. Their crystal structures have been determined by single crystal x-ray diffraction. They are dominated by two possible surroundings of Bi by O, the ψ-trigonal-bipyramidal three (B) and the ψ-tetrahedral four (T) coordination. Cs6Bi4O9 (triclinic, spacegroup P1̄, a = 813.82(12), b = 991.60(14), c = 1213.83(18) pm, α = 103.658(2), β = 93.694(3), γ = 91.662(3)°, Z = 2) contains centrosymmetric chain segmentes [Bi8O18]12- with six three- (T) and two four-coordinated (B) Bi(III) centers. K9Bi5O13 (monoclinic, spacegroup P21/c, a = 1510.98(14), b = 567.59(5), c = 2685.6(2) pm, β = 111.190(2)°, Z = 4) is a mixed valence compound with isolated [BivO4]3- tetrahedra and chains [BiIII4O9]6- of two T and two B coordinated Bi. In the compounds A2Bi4O7 (A = Rb/Cs: monoclinic, C2/c, a = 2037.0(3) / 2130.6(12), b = 1285.5(2) / 1301.9(7), c = 1566.6(2) / 1605.6(9) pm, β = 94.783(3) / 95.725(9)°, Z = 8) ribbons [Bi4O6O2/2]2- are formed, which are condensed to form a three-dimensional framework.

Pt(NH3)2(SCN)2J: Ein Platinkomplex mit gemischter Wertigkeit / Pt(NH3)2(SCN)2I: A Mixed Valence Platinum Compound

1976 ◽  
Vol 31 (2) ◽  
pp. 194-197 ◽  
Author(s):  
K. D. Buse ◽  
H. J. Keller ◽  
D. Nöthe
Keyword(s):  
Solid State ◽  
Metal Complex ◽  
Linear Chain ◽  
Mixed Valence ◽  
Molecular Iodine ◽  
Platinum Compound ◽  
Physical Evidence ◽  
Mixed Valence Compound

Pt(NH3)2(SCN)2 dissolved in liquid SO2 reacts with molecular iodine to yield a green lustrous solid of stoichiometry Pt(NH3)2(SCN)2I. The compound is diamagnetic in the solid state and in solution and has to be taken for a platinum(II, IV) mixed valence compound, therefore. Chemical and physical evidence so far suggest a linear chain solid with either iodide-bridged metal complex chains or metal complex stacks with parallel triiodide chains.

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