Concept

Crystallographic point group

Related publications (65)

L4Fe2As2Te1−xO4−yFy (L = Pr, Sm, Gd): A layered oxypnictide superconductor with Tc up to 45 K

László Forró, Richard Gaal, Andrea Pisoni, Sergiy Katrych

The synthesis and structural and physical properties of iron lanthanide oxypnictide superconductors, L4Fe2As2Te1−xO4 (L = Pr, Sm, Gd), with transition temperature at ∼25 K are reported. Single crystals have been grown at high pressure using the cubic anvil ...

American Physical Society2014

Structure and phase transitions in 0.5(Ba0.7Ca0.3TiO3)-0.5(BaZr0.2Ti0.8O3) from −100°C to 150°C

Dragan Damjanovic

The solid solution of (x)Ba0.7Ca0.3TiO3-(1-x)BaZr0.2Ti0.8O3 is known to exhibit high piezoelectric constants. Discrepancies in the reported phase transitions and structure around room temperature, however, have complicated the understanding of the enhanced ...

American Institute of Physics2013

Pr4Fe2As2Te1-xO4: A layered FeAs-based superconductor

László Forró, Richard Gaal, Janusz Andrzej Karpinski, Andrea Pisoni, Sergiy Katrych

We report crystal growth at high pressure, structure determination, and magnetic and transport studies of an oxypnictide superconductor Pr4Fe2As2Te1-xO4. Its structure resembles the known 1111 phase except for the considerably larger c lattice constant and ...

Amer Physical Soc2013

Analysing Friedel averages and differences

Philip Pattison

Various practical applications of the average (A) and difference (D) of Friedel opposites are described. Techniques based on the resonant-scattering contribution to Friedel differences are applied to see whether a crystal is centrosymmetric or not, and to ...

Wiley-Blackwell2012

Revised self-consistent continuum solvation in electronic-structure calculations

Nicola Marzari, Oliviero Andreussi

The solvation model proposed by Fattebert and Gygi [J. Comput. Chem. 23, 662 (2002)] and Scherlis et al. [J. Chem. Phys. 124, 074103 (2006)] is reformulated, overcoming some of the numerical limitations encountered and extending its range of applicability. ...

2012

Magnetoelectric effects in single crystals of the cubic ferrimagnetic helimagnet Cu2OSeO3

Jean-Philippe Ansermet, Helmuth Berger

We present magnetodielectric measurements in single crystals of the cubic spin-1/2 compound Cu2OSeO3. A magnetic-field-induced electric polarization (P) and a finite magnetocapacitance (MC) is observed at the onset of the magnetically ordered state (T-c = ...

2012

Multi-configurational quantum chemical studies of the Tc2X8n- (X = Cl, Br; n=2, 3) anions. Crystallographic structure of octabromoditechnetate(3(-))

The [Cs(2 + x)][H3O(1 -x)]Tc2Br8 center dot 4.6H(2)O (x = 0.221) salt has been synthesized and characterized by single crystal XRD. Multi-configurational quantum chemical calculations on Tc2X8n- (X = Cl, Br; n = 2, 3) have been performed and indicate the p ...

2012

Bichiral structure of ferroelectric domain walls driven by flexoelectricity

Nava Setter, Alexander Tagantsev, Petr Yudin

The influence of flexoelectric coupling on the internal structure of neutral domain walls in the tetragonal phase of perovskite ferroelectrics is studied. The effect is shown to lower the symmetry of 180 degrees walls which are oblique with respect to the ...

American Physical Society2012

Intertwining of Zeeman and Coulomb interactions on excitons in highly symmetric semiconductor quantum dots

Daniel Oberli

We present an experimental study and develop a group theoretical analysis of the Zeeman effect on excitons in pyramidal semiconductor quantum dots possessing the symmetries of the C3v point group. The magnetic field dependence of the emission pattern origi ...

2012

Phase-field modeling of the dendrite orientation transition in Al-Zn alloys

Michel Rappaz, Jonathan Friedli, Jonathan Dantzig, Paolo Di Napoli

With a few exceptions, phase-field simulations of dendritic growth in cubic materials have been modeled using simple expressions for the interfacial energy anisotropy and with strong anisotropy. However, recent experimental results show that the Dendrite O ...

Iop Publishing Ltd2012

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