scholarly journals Symmetry mode analysis of distorted polar/nonpolar structures in A -site ordered SmBaMn2O6 perovskite

2021 ◽  
Vol 103 (21) ◽  
Author(s):  
J. Blasco ◽  
G. Subías ◽  
J. L. García Muñoz ◽  
F. Fauth ◽  
M. C. Sánchez ◽  
...  
Keyword(s):  
Mode Analysis ◽  
A Site ◽  
Symmetry Mode

scholarly journals A survey of PbZrxTi1−xO3structural models using symmetry mode analysis

2013 ◽  
Vol 69 (a1) ◽  
pp. s485-s485
Author(s):  
Balazs Kocsis ◽  
J. M. Perez-Mato ◽  
E. Tasci ◽  
M. I. Aroyo ◽  
G. de la Flor
Keyword(s):  
Mode Analysis ◽  
Symmetry Mode

scholarly journals Switchable Rashba anisotropy in layered hybrid organic–inorganic perovskite by hybrid improper ferroelectricity

2020 ◽  
Vol 6 (1) ◽  
Author(s):  
Fei Wang ◽  
Heng Gao ◽  
Coen de Graaf ◽  
Josep M. Poblet ◽  
Branton J. Campbell ◽  
...  
Keyword(s):  
Optoelectronic Devices ◽  
Mode Analysis ◽  
Inversion Symmetry ◽  
Photovoltaic Materials ◽  
Model Hamiltonian ◽  
Experimental Values ◽  
Spin Orbit Interactions ◽  
Spin Texture ◽  
Symmetry Mode ◽  
Striking Effect

AbstractHybrid organic–inorganic perovskites (HOIPs) are introducing exotic directions in the photovoltaic materials landscape. The coexistence of inversion symmetry breaking and spin–orbit interactions play a key role in their optoelectronic properties. We perform a detailed study on a recently synthesized ferroelectric layered HOIP, (AMP)PbI4 (AMP = 4-aminomethyl-piperidinium). The calculated polarization and Rashba parameters are in excellent agreement with experimental values. Moreover, we report a striking effect, i.e., an extraordinarily large Rashba anisotropy that is tunable by ferroelectric polarization: as polarization is reversed, not only the spin texture chirality is inverted, but also the major and minor axes of the Rashba anisotropy ellipse in k-space are interchanged—a pseudo rotation. A k·p model Hamiltonian and symmetry-mode analysis reveal a quadrilinear coupling between the cation-rotation modes responsible for the Rashba ellipse pseudo-rotation, the framework rotation, and the polarization. These findings may provide different avenues for spin-optoelectronic devices such as spin valves or spin FETs.

A crystallographic approach to symmetry-mode analysis of phase transitions

1997 ◽  
Vol 63 (1-4) ◽  
pp. 235-255 ◽  
Author(s):  
M. I. Aroyo ◽  
J. M. Perez-mato
Keyword(s):  
Phase Transitions ◽  
Mode Analysis ◽  
Symmetry Mode

scholarly journals On-line symmetry-mode analysis of any ferroic structure

2008 ◽  
Vol 64 (a1) ◽  
pp. C527-C528
Author(s):  
J.M. Perez-Mato ◽  
D. Orobengoa ◽  
M.I. Aroyo
Keyword(s):  
Mode Analysis ◽  
On Line ◽  
Symmetry Mode

Symmetry-mode analysis of the ferroelectric phase in K2SeO4

1986 ◽  
Vol 19 (12) ◽  
pp. 1923-1935 ◽  
Author(s):  
J M Perez-Mato ◽  
F Gaztelua ◽  
G Madariaga ◽  
M J Tello
Keyword(s):  
Ferroelectric Phase ◽  
Mode Analysis ◽  
Symmetry Mode

Structural phase transitions and magnetic and spectroscopic properties of the double perovskites Sr2Co1−xMgxTeO6 (x = 0.1, 0.2 and 0.5)

2015 ◽  
Vol 44 (30) ◽  
pp. 13716-13734 ◽  
Author(s):  
B. Orayech ◽  
L. Ortega-San-Martín ◽  
I. Urcelay-Olabarria ◽  
L. Lezama ◽  
T. Rojo ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Phase Transitions ◽  
Structural Phase ◽  
Spectroscopic Properties ◽  
Mode Analysis ◽  
Double Perovskites ◽  
Structural Phase Transitions ◽  
X Ray ◽  
Structural And Magnetic Properties ◽  
Symmetry Mode

Structural and magnetic properties of a series of double perovskites are investigated by X-ray and Neutron diffraction, EPR and magnetic susceptibility. The structural and phase-transitions analysis are done using symmetry mode-analysis approach.

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