Long-range crystal-lattice distortion fields of epitaxial Ge-Sb-Te phase-change materials

2013 ◽  
Vol 251 (4) ◽  
pp. 769-773 ◽  
Author(s):  
Ferhat Katmis ◽  
Martin Schmidbauer ◽  
Sergiy M. Bokoch ◽  
Peter Rodenbach ◽  
Henning Riechert ◽  
...  
Keyword(s):  
Phase Change ◽  
Crystal Lattice ◽  
Long Range ◽  
Phase Change Materials ◽  
Lattice Distortion ◽  
Crystal Lattice Distortion

scholarly journals Long-range crystal-lattice distortion fields of epitaxial Ge-Sb-Te phase-change materials (Phys. Status Solidi B 4/2014)

2014 ◽  
Vol 251 (4) ◽  
Author(s):  
Ferhat Katmis ◽  
Martin Schmidbauer ◽  
Sergiy M. Bokoch ◽  
Peter Rodenbach ◽  
Henning Riechert ◽  
...  
Keyword(s):  
Phase Change ◽  
Crystal Lattice ◽  
Long Range ◽  
Phase Change Materials ◽  
Lattice Distortion ◽  
Crystal Lattice Distortion

Structural dynamics of PZT thin films at the nanoscale

2005 ◽  
Vol 902 ◽  
Author(s):  
Alexei Grigoriev ◽  
Dal-Hyun Do ◽  
Dong Min Kim ◽  
Chang-Beom Eom ◽  
Bernhard Adams ◽  
...  
Keyword(s):  
Crystal Lattice ◽  
Lattice Distortion ◽  
Piezoelectric Effect ◽  
Polarization Switching ◽  
X Rays ◽  
Time Resolved ◽  
X Ray ◽  
Converse Piezoelectric Effect ◽  
Ferroelectric Capacitors ◽  
Crystal Lattice Distortion

AbstractWhen an electric field is applied to a ferroelectric the crystal lattice spacing changes as a result of the converse piezoelectric effect. Although the piezoelectric effect and polarization switching have been investigated for decades there has been no direct nanosecond-scale visualization of these phenomena in solid crystalline ferroelectrics. Synchrotron x-rays allow the polarization switching and the crystal lattice distortion to be visualized in space and time on scales of hundreds of nanometers and hundreds of picoseconds using ultrafast x-ray microdiffraction. Here we report the polarization switching visualization and polarization domain wall velocities for Pb(Zr0.45Ti0.55)O3 thin film ferroelectric capacitors studied by time-resolved x-ray microdiffraction.

X-ray backscattering study of crystal lattice distortion in hidden order of URu2Si2

2014 ◽  
Vol 94 (32-33) ◽  
pp. 3691-3701 ◽  
Author(s):  
C. Tabata ◽  
T. Inami ◽  
S. Michimura ◽  
M. Yokoyama ◽  
H. Hidaka ◽  
...  
Keyword(s):  
Crystal Lattice ◽  
Lattice Distortion ◽  
X Ray ◽  
Hidden Order ◽  
Crystal Lattice Distortion

Cultivating crystal lattice distortion in IrO2via coupling with MnO2 to boost the oxygen evolution reaction with high intrinsic activity

2018 ◽  
Vol 54 (39) ◽  
pp. 4959-4962 ◽  
Author(s):  
Zhenhua Zhou ◽  
Waqas Qamar Zaman ◽  
Wei Sun ◽  
Li-mei Cao ◽  
Muhammad Tariq ◽  
...  
Keyword(s):  
Crystal Lattice ◽  
Oxygen Evolution Reaction ◽  
Lattice Distortion ◽  
Substrate Material ◽  
Intrinsic Activity ◽  
Teller Distortion ◽  
Mn Oxide ◽  
Jahn Teller ◽  
Jahn Teller Distortion ◽  
Crystal Lattice Distortion

Enhancing the OER performance by cultivating Jahn–Teller distortion in IrO2 with Mn oxide being the substrate material.

Deformation Effect on Microtwinning and Crystal Lattice Distortion of Polycrystalline Cu–Al Alloys

2021 ◽  
Vol 63 (11) ◽  
pp. 1904-1908
Author(s):  
N. A. Koneva ◽  
L. I. Trishkina ◽  
T. V. Cherkasova ◽  
A. N. Solov’ev ◽  
N. V. Cherkasov
Keyword(s):  
Crystal Lattice ◽  
Lattice Distortion ◽  
Al Alloys ◽  
Deformation Effect ◽  
Crystal Lattice Distortion

scholarly journals Unusual Force Constants Guided Distortion-Triggered Loss of Long-Range Order in Phase Change Materials

Materials ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3514
Author(s):  
Jiong Wang ◽  
Dongyu Cui ◽  
Yi Kong ◽  
Luming Shen
Keyword(s):  
Phase Change ◽  
Long Range ◽  
First Principles ◽  
Phase Change Materials ◽  
Nearest Neighbor ◽  
Range Order ◽  
Force Constants ◽  
Long Range Order ◽  
Dynamic Simulations ◽  
Functional Components

Unusual force constants originating from the local charge distribution in crystalline GeTe and Sb2Te3 are observed by using the first-principles calculations. The calculated stretching force constants of the second nearest-neighbor Sb-Te and Ge-Te bonds are 0.372 and −0.085 eV/Å2, respectively, which are much lower than 1.933 eV/Å2 of the first nearest-neighbor bonds although their lengths are only 0.17 Å and 0.33 Å longer as compared to the corresponding first nearest-neighbor bonds. Moreover, the bending force constants of the first and second nearest-neighbor Ge-Ge and Sb-Sb bonds exhibit large negative values. Our first-principles molecular dynamic simulations also reveal the possible amorphization of Sb2Te3 through local distortions of the bonds with weak and strong force constants, while the crystalline structure remains by the X-ray diffraction simulation. By identifying the low or negative force constants, these weak atomic interactions are found to be responsible for triggering the collapse of the long-range order. This finding can be utilized to guide the design of functional components and devices based on phase change materials with lower energy consumption.

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