60 citations · 144 across the 16 of their papers we have counts for
16 papers
Evaluating covalency using RIXS spectral weights: Silver fluorides vs. cuprates
Ilya Degtev, Daniel Jezierski, Adrián Gómez Pueyo +9
We investigate the electronic structure of AgF2, AgFBF4, AgF and Ag2O using X-ray absorption spectroscopy (XAS) and resonant inelastic X-ray scattering (RIXS) at the Ag L3 edge. XA…
Electron-overdoped Ag(II)F2: mixed-valence fluorides Ag(I)Ag(II)F3 and Ag(I)2Ag(II)F4
Katarzyna Kuder, Kacper Koteras, Zoran Mazej +1
We have successfully prepared two novel mixed-valence compounds of silver, Ag(I)Ag(II)F3 and Ag(I)2Ag(II)F4. They may be considered to be long-sought strongly electron-overdoped Ag…
Novel Ternary AgIICoIIIF5 Fluoride: Synthesis, Structure and Magnetic Characteristics
Daniel Jezierski, Zoran Mazej, Wojciech Grochala
We present a new compound in the silver cobalt fluoride system, featuring paramagnetic silver (d9) and high-spin cobalt (d6), synthesized by solid state method in an autoclave unde…
Rearrangement of orbitals in KAgF3 due to Kugel-Khomskii mechanism: a Neutron diffraction and Density Functional Theory study
Kacper Koteras, Sebastian Biesenkamp, Paolo Barone +6
The crystal structure of KAgF3 was studied by powder neutron diffraction. KAgF3 exhibits at all temperatures an orthorhombic symmetry in space group Pnma that allows for several di…
A unique two-dimensional silver(II) antiferromagnet Cu[Ag(SO4)2] and perspectives for its further modifications
Mateusz Domanski, Zoran Mazej, Wojciech Grochala
Copper(II) silver(II) sulfate crystallizes in a monoclinic CuSO4-related structure with P21/n symmetry. This quasi-ternary compound features [Ag(SO4)2]2- layers, while the remainin…
Unexpected coexisting solid solutions in the quasi-binary Ag(II)F2/Cu(II)F2 phase diagram
D. Jezierski, K. Koteras, M. Domanski +4
High-temperature solid-state reaction between orthorhombic AgF2 and monoclinic CuF2 (y = 0.15, 0.3, 0.4, 0.5) in a fluorine atmosphere resulted in coexisting solid solutions of Cu-…
Low temperature magnetism of KAgF3
John M. Wilkinson, Stephen J. Blundell, Sebastian Biesenkamp +7
KAgF is a quasi one-dimensional quantum antiferromagnet hosting a series of intriguing structural and magnetic transitions. Here we use powder neutron diffraction, SR spectr…
New CuSO4-related high-temperature polymorph of AgIISO4
Mateusz Domanski, Zoran Mazej, Wojciech Grochala
Silver(II) compounds exhibit powerful oxidizing properties and strong magnetic superexchange. AgSO4 is a rare fluorine-free salt of Ag(II) which found some application in organic c…
Strength of Correlations in a Silver Based Cuprate Analogue
Riccardo Piombo, Daniel Jezierski, Henrique Perin Martins +10
AgF2 has been proposed as a cuprate analogue which requires strong correlation and marked covalence. On the other hand, fluorides are usually quite ionic and 4d transition metals t…
Phase transitions and amorphization of M2AgF4 (M = Na, K, Rb) compounds at high pressure
Jakub Gawraczynski, Łukasz Wolanski, Adam Grzelak +3
We report the results of Raman spectroscopy high-pressure studies of alkali metal fluoroargentates (M2AgF4, where M=Na, K, Rb) associated with theoretical and x-ray diffraction stu…
Crystal structure, lattice dynamics and superexchange in MAgF3 1D antiferromagnets (M = K, Rb, Cs) and Rb3Ag2F7 Ruddlesden-Popper phase
Kacper Koteras, Jakub Gawraczynski, Gasper Tavcar +2
With the use of lattice dynamics calculation within hybrid HSE06 framework we were able to understand vibrational spectra of MAgF3 M = K, Rb, Cs compounds. Comparative theoretical…
NaZnF3 as a low-pressure analogue of MgSiO3
Dominik Kurzydłowski, Arkadiusz Gajek, Zoran Mazej
Solid-state systems whose properties at high pressure (exceeding 1 GPa) mimic those of MgSiO3 are of large importance in the study of the interior of planets. By means of Density F…
Charge Transfer and excitations in AgF
Nimrod Bachar, Kacper Koteras, Jakub Gawraczynski +11
Charge transfer (CT) insulators are the parent phase of a large group of today's unconventional high-temperature superconductors. Here we study experimentally and theoretically the…
Lattice dynamics of KAgF3 perovskite, unique 1D antiferromagnet
Kacper Koteras, Jakub Gawraczynski, Mariana Derzsi +2
Theoretical DFT calculations using GGA+U and HSE06 frameworks enabled vibrational mode assignment and partial (atomic) phonon DOS determination in KAgF3 perovskite, a low-dimension…
Unexpected persistence of cis-bridged chains in compressed AuF3
Dominik Kurzydłowski, Serhiy Kobyakov, Zoran Mazej +3
Raman scattering measurements indicate that cis-bridged chains are retained in AuF3 even at a compression of 45 GPa - in contrast to meta-GGA calculations suggesting that structure…
The silver route to cuprate analogs
Jakub Gawraczyński, Dominik Kurzydłowski, Wojciech Gadomski +13
The parent compound of high-Tc superconducting cuprates is a unique Mott state consisting of layers of spin-1/2 ions arranged on a square lattice and with a record high antiferroma…