Journal ArticleDOI
Modeling of a structural phase transition in La2−x SrxCuO4
TLDR
In this paper, structural, vibrational, and elastic properties of La2CuO4 are calculated using a model for calculating the energy of the crystal based on interionic potentials with the multiparticle Jahn-Teller contribution included explicitly.Abstract:
The structural, vibrational, and elastic properties of La2CuO4 are calculated using a model for calculating the energy of the crystal based on interionic potentials with the multiparticle Jahn-Teller contribution included explicitly. The microscopic reasons for the structural instability of the La2CuO4 lattice relative to rotations of the oxygen octahedra are investigated. A structural phase transition from the orthorhombic phase (space group D
2
18
) into the tetragonal phase (space group D
4
17
) under hydrostatic compression of an La2−x
SrxCuO4 crystal is modeled. The (P,x) structural phase diagram for La2−x
SrxCuO4 is constructed.read more
Citations
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Journal ArticleDOI
High-temperature heat capacity of La 2 CuO 4
TL;DR: The heat capacity of La2CuO4 has been measured in the temperature range 400-950 K and the temperature dependence of the heat capacity has been found to exhibit an extremum at 526 K as mentioned in this paper.
Journal ArticleDOI
High-temperature heat capacity of Gd 2 CuO 4
TL;DR: In this paper, the heat capacity of Gd2CuO4 has been studied by differential scanning calorimetry in the temperature range 362-958 K and it has been found that the temperature dependence of the molar heat capacity has an extremum near 590 K; the extremum is related to a phase transition from the high temperature temperature tetragonal phase to the low-temperature orthorhombic phase.
Journal ArticleDOI
Pressure induced lattice effects in pure and near optimally doped La 2 - x Sr x CuO 4
M. Calamiotou,P. Parisiades,P. Parisiades,E. Siranidi,Dimitrios Lampakis,Kazimierz Conder,E. Liarokapis +6 more
TL;DR: The effect of hydrostatic pressure on La2−xSrxCuO4 has been examined by synchrotron angle-resolved powder XRD (at RT and at 20 K for x = 0.0 and 0.15) with two pressure transmitting media (methanol-ethanol and neon) and by Raman spectroscopy.
References
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High-temperature superconductors
TL;DR: In the years following the discovery of superconductivity in doped lanthanum copper oxide in late 1986, there has been a large multinational effort in the study of what are now called high Tc superconductors as discussed by the authors.
Journal ArticleDOI
Structural and superconducting properties of La2-xSrxCuO4 as a function of Sr content.
Paolo G. Radaelli,D. G. Hinks,A. W. Mitchell,Brett A. Hunter,J. L. Wagner,Bogdan Dabrowski,Kurt Vandervoort,Viswanathan Hk,James D. Jorgensen +8 more
TL;DR: In this article, the structural and superconducting properties of La[sub 2[minus][ital x]Sr[sub [ital x]]CuO[sub 4] by neutron and x-ray powder diffraction were studied.
Book
Representations of the crystallographic space groups : irreducible representations, induced representations, and corepresentations
TL;DR: Theoretical Considerations and Explanations of Tables Small Irreducible Representations, Irreduceible Core Presentations and Induced Representation of the 230 Crystallographic Space Groups Tables of Loaded IRRRepresentations Complete IRR Representations of the Crystallogram Space Groups.
Journal ArticleDOI
Pressure effects on superconductivity and structural phase transitions in La2−xMxCuO4 (M Ba, Sr)
N. Yamada,Masayuki Ido +1 more
TL;DR: In this article, the relationship between superconductivity and the crystal structure of La 2− x M x CuO 4 (M Sr, Ba) is studied under high pressures up to 20 kbar.
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