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Tchougréeff A, Plekhanov E, Dronskowski R. Solid-state quantum chemistry with ΘΦ (ThetaPhi): Spin-liquids, superconductors, and magnetic superstructures made computationally available. J Comput Chem 2021; 42:1498-1513. [PMID: 34018219 DOI: 10.1002/jcc.26561] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 05/02/2021] [Accepted: 05/04/2021] [Indexed: 01/17/2023]
Abstract
We present a standalone ΘΦ (ThetaPhi) package capable to read the results of ab initio DFT/PAW quantum-chemical solid-state calculations processed through various tools projecting them to the atomic basis states as an input and to perform on top of this an analysis of so derived electronic structure which includes (among other options) the possibility to obtain a superconducting (Bardeen-Cooper-Schrieffer, BCS), spin-liquid (resonating valence bond, RVB) states/phases as solutions of the electronic structure problem along with the magnetically ordered phases with an arbitrary pitch (magnetic superstructure) vector. Remarkably, different solutions of electronic-structure problems come out as temperature-dependent (exemplified by various superconducting and spin-liquid phases) which feature is as well implemented. All that is exemplified by model calculations on 1D chain, 2D square lattice as well as on more realistic superconducting doped graphene, magnetic phases of iron, and spin-liquid and magnetically ordered states of a simplest nitrogen-based copper pseudo-oxide, CuNCN, resembling socalled metal-oxide framework (MOF) phases by the atomic interlinkage.
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Affiliation(s)
- Andrei Tchougréeff
- A.N. Frumkin Institute of Physical Chemistry and Electrochemistry of Russian Academy of Science, Moscow, Russia
| | - Evgeny Plekhanov
- King's College London, Theory and Simulation of Condensed Matter (TSCM), The Strand, London WC2R 2LS, United Kingdom and A.N. Frumkin Institute of Physical Chemistry and Electrochemistry of Russian Academy of Science, Moscow, Russia
| | - Richard Dronskowski
- Institut für anorganische Chemie, RWTH Aachen University Aachen, Germany, Shenzhen, China.,Jülich-Aachen Research Alliance, JARA-HPC, RWTH Aachen University, Aachen, Germany.,Hoffmann Institute of Advanced Materials, Shenzhen Polytechnic, Shenzhen, China
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2
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Zhao W, Pan J, Huang F. Nonaqueous synthesis of metal cyanamide semiconductor nanocrystals for photocatalytic water oxidation. Chem Commun (Camb) 2018; 54:1575-1578. [DOI: 10.1039/c7cc09699b] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ag2NCN nanorods synthesized in nonaqueous solution are used as novel visible-light-driven photocatalysts for water oxidation.
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Affiliation(s)
- Wei Zhao
- State Key Laboratory of High Performance Ceramics and Super fine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences
- Shanghai 200050
- China
| | - Jie Pan
- State Key Laboratory of High Performance Ceramics and Super fine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences
- Shanghai 200050
- China
- University of Chinese Academy of Sciences
- Beijing 100049
| | - Fuqiang Huang
- State Key Laboratory of High Performance Ceramics and Super fine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences
- Shanghai 200050
- China
- State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University
- Beijing 100871
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3
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Nelson R, Konze PM, Dronskowski R. First-Principles Chemical Bonding Study of Manganese Carbodiimide, MnNCN, As Compared to Manganese Oxide, MnO. J Phys Chem A 2017; 121:7778-7786. [DOI: 10.1021/acs.jpca.7b08218] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ryky Nelson
- Institute
of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52056 Aachen, Germany
| | - Philipp M. Konze
- Institute
of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52056 Aachen, Germany
| | - Richard Dronskowski
- Institute
of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52056 Aachen, Germany
- Jülich-Aachen
Research Alliance (JARA-FIT and JARA-HPC), RWTH Aachen University, 52056 Aachen, Germany
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Tchougréeff AL, Stoffel RP, Houben A, Jacobs P, Dronskowski R, Pregelj M, Zorko A, Arčon D, Zaharko O. Atomic motions in the layered copper pseudochalcogenide CuNCN indicative of a quantum spin-liquid scenario. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2017; 29:235701. [PMID: 28430106 DOI: 10.1088/1361-648x/aa6e73] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We explore the thermodynamic properties of the layered copper(II) carbodiimide CuNCN by heat-capacity measurements and investigate the corresponding thermal atomic motions by means of neutron powder diffraction as well as inelastic neutron scattering. The experiments are complemented by a combination of density-functional calculations, phonon analysis and analytic theory. The existence of a soft flexural mode-bending of the layers, characteristic for the material structure-is established in the phonon spectrum of CuNCN by giving characteristic temperature-dependent contributions to the heat capacity and atomic displacement parameters. The agreement with the neutron data allows us to extract a residual-on top of the lattice-presumably spinon contribution to the heat capacity [Formula: see text], speaking in favor of the spin-liquid picture of the electronic phases of CuNCN.
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Affiliation(s)
- Andrei L Tchougréeff
- Institute of Inorganic Chemistry, RWTH Aachen University, D-52056 Aachen, Germany. Moscow Center for Continuous Mathematical Education, Bol. Vlasevskiy 11, 119002 Moscow, Russia. A.N. Frumkin Institute of Physical Chemistry and Electrochemistry of Russian Academy of Science, Moscow, Russia
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Sougrati MT, Darwiche A, Liu X, Mahmoud A, Hermann RP, Jouen S, Monconduit L, Dronskowski R, Stievano L. Transition‐Metal Carbodiimides as Molecular Negative Electrode Materials for Lithium‐ and Sodium‐Ion Batteries with Excellent Cycling Properties. Angew Chem Int Ed Engl 2016; 55:5090-5. [DOI: 10.1002/anie.201600098] [Citation(s) in RCA: 74] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Moulay T. Sougrati
- Institut Charles Gerhardt de Montpellier, UMR CNRS 5253 34095 Montpellier France
- Réseau sur le Stockage Electrochimique de l'Energie, FR CNRS 3459 80039 Amiens France
| | - Ali Darwiche
- Institut Charles Gerhardt de Montpellier, UMR CNRS 5253 34095 Montpellier France
- Réseau sur le Stockage Electrochimique de l'Energie, FR CNRS 3459 80039 Amiens France
| | - Xiaohiu Liu
- Institute of Inorganic Chemistry RWTH Aachen University 52056 Aachen Germany
| | - Abdelfattah Mahmoud
- JCNS and PGI, JARA-FIT, Forschungszentrum Jülich GmbH 52425 Jülich Germany
- LCIS/GREENMAT Institute of Chemistry B6 University of Liège 4000 Liège Belgium
| | - Raphael P. Hermann
- JCNS and PGI, JARA-FIT, Forschungszentrum Jülich GmbH 52425 Jülich Germany
- Materials Science and Technology Division Oak Ridge National Laboratory Oak Ridge TN 37831 USA
| | - Samuel Jouen
- Groupe de Physique des Matériaux UMR CNRS 6634 – Normandie University 76801 St Etienne du Rouvray Cedex France
| | - Laure Monconduit
- Institut Charles Gerhardt de Montpellier, UMR CNRS 5253 34095 Montpellier France
- Réseau sur le Stockage Electrochimique de l'Energie, FR CNRS 3459 80039 Amiens France
| | - Richard Dronskowski
- Institute of Inorganic Chemistry RWTH Aachen University 52056 Aachen Germany
| | - Lorenzo Stievano
- Institut Charles Gerhardt de Montpellier, UMR CNRS 5253 34095 Montpellier France
- Réseau sur le Stockage Electrochimique de l'Energie, FR CNRS 3459 80039 Amiens France
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Sougrati MT, Darwiche A, Liu X, Mahmoud A, Hermann RP, Jouen S, Monconduit L, Dronskowski R, Stievano L. Übergangsmetallcarbodiimide als molekulare negative Elektroden‐ materialien für Li‐ und Na‐Ionenbatterien mit hervorragendem Zyklisierungsverhalten. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201600098] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Moulay T. Sougrati
- Institut Charles Gerhardt de Montpellier, UMR CNRS 5253 34095 Montpellier Frankreich
- Réseau sur le Stockage Electrochimique de l'Energie, FR CNRS 3459 80039 Amiens Frankreich
| | - Ali Darwiche
- Institut Charles Gerhardt de Montpellier, UMR CNRS 5253 34095 Montpellier Frankreich
- Réseau sur le Stockage Electrochimique de l'Energie, FR CNRS 3459 80039 Amiens Frankreich
| | - Xiaohiu Liu
- Institut für Anorganische Chemie der RWTH Aachen 52056 Aachen Deutschland
| | - Abdelfattah Mahmoud
- JCNS und PGI, JARA-FIT, Forschungszentrum Jülich GmbH 52425 Jülich Deutschland
- LCIS/GREENMAT Institut de Chimie B6 University of Liège 4000 Liège Belgien
| | - Raphael P. Hermann
- JCNS und PGI, JARA-FIT, Forschungszentrum Jülich GmbH 52425 Jülich Deutschland
- Materials Science and Technology Division Oak Ridge National, Laboratory 37831 Oak Ridge TN USA
| | - Samuel Jouen
- Groupe de Physique des Matériaux UMR CNRS 6634 – Universität Normandie 76801 St Etienne du Rouvray Cedex Frankreich
| | - Laure Monconduit
- Institut Charles Gerhardt de Montpellier, UMR CNRS 5253 34095 Montpellier Frankreich
- Réseau sur le Stockage Electrochimique de l'Energie, FR CNRS 3459 80039 Amiens Frankreich
| | | | - Lorenzo Stievano
- Institut Charles Gerhardt de Montpellier, UMR CNRS 5253 34095 Montpellier Frankreich
- Réseau sur le Stockage Electrochimique de l'Energie, FR CNRS 3459 80039 Amiens Frankreich
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Frustration-induced nanometre-scale inhomogeneity in a triangular antiferromagnet. Nat Commun 2015; 5:3222. [PMID: 24477185 PMCID: PMC4273263 DOI: 10.1038/ncomms4222] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2013] [Accepted: 01/08/2014] [Indexed: 11/08/2022] Open
Abstract
Phase inhomogeneity of otherwise chemically homogenous electronic systems is an essential ingredient leading to fascinating functional properties, such as high-Tc superconductivity in cuprates, colossal magnetoresistance in manganites and giant electrostriction in relaxors. In these materials distinct phases compete and can coexist owing to intertwined ordered parameters. Charge degrees of freedom play a fundamental role, although phase-separated ground states have been envisioned theoretically also for pure spin systems with geometrical frustration that serves as a source of phase competition. Here we report a paradigmatic magnetostructurally inhomogenous ground state of the geometrically frustrated α-NaMnO2 that stems from the system's aspiration to remove magnetic degeneracy and is possible only due to the existence of near-degenerate crystal structures. Synchrotron X-ray diffraction, nuclear magnetic resonance and muon spin relaxation show that the spin configuration of a monoclinic phase is disrupted by magnetically short-range-ordered nanoscale triclinic regions, thus revealing a novel complex state of matter.
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Jacobs P, Houben A, Tchougréeff AL, Dronskowski R. High-resolution neutron diffraction study of CuNCN: New evidence of structure anomalies at low temperature. J Chem Phys 2013; 139:224707. [DOI: 10.1063/1.4840555] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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9
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Tchougréeff AL, Dronskowski R. Low-temperature structure anomalies in CuNCN. Manifestations of RVB phase transitions? JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2013; 25:435602. [PMID: 24097193 DOI: 10.1088/0953-8984/25/43/435602] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We propose a new frustrated Heisenberg antiferromagnetic model with spatially anisotropic exchange parameters Jc, Ja, and Jac, extending along the c, a, and a ± c (c-a-ca model) lattice directions, and apply it to describe the fascinating physics of copper carbodiimide, CuNCN, assuming the resonating valence bond (RVB) type of its phases. This explains within a unified picture the intriguing absence of magnetic order in CuNCN. We further present a parameters-temperature phase diagram of the c-a-ca-RVB model in the high-temperature approximation. Eight different phases including Curie and Pauli paramagnets (respectively, in disordered and 1D- or Q1D-RVB phases) and (pseudo)gapped (quasi-Arrhenius) paramagnets (2D-RVB phases) are possible. By adding magnetostriction and elastic terms to the model, we derive possible structural manifestations of RVB phase transitions. Assuming a sequence of RVB phase transitions to occur in CuNCN with decreasing temperature, several anomalies observed in the temperature course of the lattice constants are explained.
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Affiliation(s)
- A L Tchougréeff
- Institut für anorganische Chemie RWTH-Aachen University, Landoltweg 1, D-52056, Aachen, Germany
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Zorko A, Pregelj M, Potočnik A, van Tol J, Ozarowski A, Simonet V, Lejay P, Petit S, Ballou R. Role of antisymmetric exchange in selecting magnetic chirality in Ba3NbFe3Si2O14. PHYSICAL REVIEW LETTERS 2011; 107:257203. [PMID: 22243107 DOI: 10.1103/physrevlett.107.257203] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2011] [Indexed: 05/31/2023]
Abstract
We present an electron spin resonance (ESR) investigation of the acentric Ba(3)NbFe(3)Si(2)O(14), featuring a unique single-domain double-chiral magnetic ground state. Combining simulations of the ESR linewidth anisotropy and the antiferromagnetic-resonance modes allows us to single out the Dzyaloshinsky-Moriya (DM) interaction as the leading magnetic anisotropy term. We demonstrate that the rather minute out-of-plane DM component d(c)=45 mK is responsible for selecting a unique ground state, which endures thermal fluctuations up to astonishingly high temperatures.
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Affiliation(s)
- A Zorko
- Jožef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia
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