scholarly journals Trojans That Flip the Black Phase: Impurity-Driven Stabilization and Spontaneous Strain Suppression in γ-CsPbI3 Perovskite

2021 ◽  
Author(s):  
Julian A. Steele ◽  
Vittal Prakasam ◽  
Haowei Huang ◽  
Eduardo Solano ◽  
Dmitry Chernyshov ◽  
...  
Keyword(s):  
Spontaneous Strain

Spontaneous strain of conductive strontium titanate Sr1−xLaxTiO3measured by using X-ray topographic domain contrast

2011 ◽  
Vol 84 (9-10) ◽  
pp. 837-842 ◽  
Author(s):  
T. Ozaki ◽  
K. Kusunose ◽  
H. Yamaguchi ◽  
K. Kajiwara ◽  
Y. Chikaura
Keyword(s):  
Strontium Titanate ◽  
Spontaneous Strain ◽  
X Ray

scholarly journals Monoclinic–orthorhombic first-order phase transition in K2ZnSi5O12 leucite analogue; transition mechanism and spontaneous strain analysis.

2021 ◽  
pp. 1-20
Author(s):  
Anthony M.T. Bell ◽  
Francis Clegg ◽  
Christopher M.B. Henderson
Keyword(s):  
Phase Transition ◽  
Strain Analysis ◽  
Phase Region ◽  
Martensitic Transition ◽  
Two Phase ◽  
Spontaneous Strain ◽  
First Order ◽  
Transition Mechanism ◽  
First Order Phase Transition ◽  
Increasing Temperature

Abstract Hydrothermally synthesised K2ZnSi5O12 has a polymerised framework structure with the same topology as leucite (KAlSi2O6, tetragonal I41/a), which has two tetrahedrally coordinated Al3+ cations replaced by Zn2+ and Si4+. At 293 K it has a cation-ordered framework P21/c monoclinic structure with lattice parameters a = 13.1773(2) Å, b = 13.6106(2) Å, c = 13.0248(2) Å and β = 91.6981(9)°. This structure is isostructural with K2MgSi5O12, the first cation-ordered leucite analogue characterised. With increasing temperature, the P21/c structure transforms reversibly to cation-ordered framework orthorhombic Pbca. This transition takes place over the temperature range 848−863 K where both phases coexist; there is an ~1.2% increase in unit cell volume between 843 K (P21/c) and 868 K (Pbca), characteristic of a first-order, displacive, ferroelastic phase transition. Spontaneous strain analysis defines the symmetry- and non-symmetry related changes and shows that the mechanism is weakly first order; the two-phase region is consistent with the mechanism being a strain-related martensitic transition.

scholarly journals Symmetry Breakdown in Franckeite: Spontaneous Strain, Rippling and Interlayer Moiré

2019 ◽  
Author(s):  
Riccardo Frisenda ◽  
Gabriel Sanchez-Santolino ◽  
Nikos Papadopoulos ◽  
Joanna Urban ◽  
Michal Baranowski ◽  
...  
Keyword(s):  
Optical Properties ◽  
Plane Strain ◽  
Van Der Waals ◽  
Van Der Waals Interaction ◽  
Spatial Modulation ◽  
Two Dimensional ◽  
Spontaneous Strain ◽  
Strain Profile ◽  
Symmetry Breakdown ◽  
Naturally Occurring

<p>Franckeite is a naturally occurring layered mineral with a structure composed of alternating stacks of SnS<sub>2</sub>-like and PbS-like layers. Although this superlattice is composed of a sequence of isotropic two-dimensional layers, it exhibits a spontaneous rippling that makes the material structurally anisotropic. We demonstrate that this rippling comes hand in hand with an inhomogeneous in-plane strain profile and anisotropic electrical, vibrational and optical properties. We argue that this symmetry breakdown results from a spatial modulation of the van der Waals interaction between layers due to the SnS<sub>2</sub>-like and PbS-like lattices incommensurability.</p>

Proton conductivity and spontaneous strain below superprotonic phase transition in Rb3H(SeO4)2

2005 ◽  
Vol 176 (31-34) ◽  
pp. 2461-2465 ◽  
Author(s):  
Yasumitsu Matsuo ◽  
Junko Hatori ◽  
Yukihiko Yoshida ◽  
Keiko Saito ◽  
Seiichiro Ikehata
Keyword(s):  
Phase Transition ◽  
Proton Conductivity ◽  
Spontaneous Strain ◽  
Superprotonic Phase Transition ◽  
Superprotonic Phase

Spontaneous strain variations through the low temperature phase transitions of deuterated lawsonite

2003 ◽  
Vol 88 (4) ◽  
pp. 534-546 ◽  
Author(s):  
Michael A. Carpenter ◽  
Hinrich-Wilhelm Meyer ◽  
Peter Sondergeld ◽  
Stefan Marion ◽  
Kevin S. Knight
Keyword(s):  
Phase Transitions ◽  
Low Temperature ◽  
Temperature Phase ◽  
Spontaneous Strain ◽  
Low Temperature Phase

The spontaneous strain in in the quantum paraelectric regime: the dependence on sample preparation

1998 ◽  
Vol 10 (28) ◽  
pp. 6453-6459 ◽  
Author(s):  
H Hünnefeld ◽  
U Rütt ◽  
J R Schneider ◽  
S Kapphan
Keyword(s):  
Sample Preparation ◽  
Spontaneous Strain ◽  
Quantum Paraelectric

Spontaneous strain variations through the low-temperature displacive phase transition of LiGaSi2O6 clinopyroxene

2009 ◽  
Vol 21 (3) ◽  
pp. 599-614 ◽  
Author(s):  
Fernando Ćmara ◽  
Fabrizio Nestola ◽  
Ross J. Angel ◽  
Haruo Ohashi
Keyword(s):  
Phase Transition ◽  
Low Temperature ◽  
Spontaneous Strain ◽  
Displacive Phase Transition

Spontaneous strain below the $$I\bar 1 - P\bar 1$$ transition in anorthite at pressure

1989 ◽  
Vol 16 (6) ◽  
pp. 539-544 ◽  
Author(s):  
R. J. Angel ◽  
S. A. T. Redfern ◽  
N. L. Ross
Keyword(s):  
Spontaneous Strain
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