The role of Jahn–Teller distortion in insulator to semiconductor phase transition in organic–inorganic hybrid compound (p-chloroanilinium)2CuCl4at high pressure

2015 ◽  
Vol 17 (48) ◽  
pp. 32204-32210 ◽  
Author(s):  
Pallavi Ghalsasi ◽  
Nandini Garg ◽  
M. N. Deo ◽  
Alka Garg ◽  
Hemant Mande ◽  
...  
Keyword(s):  
Phase Transition ◽  
High Pressure ◽  
Hybrid Compound ◽  
Teller Distortion ◽  
Inorganic Hybrid ◽  
Jahn Teller ◽  
Jahn Teller Distortion

The captions for pressure values are not centered below each micrograph.

Unveiling the role of Mn-interstitial defect and particle size on the Jahn-Teller distortion of the LiMn2O4 cathode material

2021 ◽  
Vol 490 ◽  
pp. 229519
Author(s):  
Renier Arabolla Rodríguez ◽  
Nelcy Della Santina Mohallem ◽  
Manuel Avila Santos ◽  
Demetrio A. Sena Costa ◽  
Luciano Andrey Montoro ◽  
...  
Keyword(s):  
Particle Size ◽  
Cathode Material ◽  
Teller Distortion ◽  
Interstitial Defect ◽  
Jahn Teller ◽  
Limn2o4 Cathode ◽  
Jahn Teller Distortion

Phase Transition of LiMn2O4 Spinel and its Application for Lithium Ion Secondary Battery

1997 ◽  
Vol 496 ◽  
Author(s):  
Junji Tabuchi ◽  
Tatsuji Numata ◽  
Yuichi Shimakawa ◽  
Masato Shirakata
Keyword(s):  
Phase Transition ◽  
Lithium Ion ◽  
Electrochemical Characteristics ◽  
Teller Distortion ◽  
Limn2o4 Spinel ◽  
Structure Changes ◽  
Jahn Teller ◽  
Initial Charge ◽  
Lower Temperature ◽  
Jahn Teller Distortion

ABSTRACTLiMn2O4 has a phase transition at room temperature, which is caused by Jahn-Teller distortion. DC resistivity of LiMn2O4 shows an anomaly at the transition temperature, while no such anomaly is observed in samples with excess lithium. X-ray diffraction patterns of LiMn2O4reveal that the crystal structure changes from cubic at higher temperature to orthorombic, as a first approximation, at lower temperature. However, no differences in initial charge-discharge curve are observed, which means that the Jahn-Teller distortion has no effect on electrochemical characteristics. The authors have succeeded in mass-producing lithium ion secondary batteries with a manganese spinel cathode.

Crystal structures and phase transition in (Sr0.8Ce0.2)(Mn1−yCoy)O3(y= 0 and 0.2): the influence of Jahn–Teller distortion

2009 ◽  
Vol 21 (12) ◽  
pp. 124218 ◽  
Author(s):  
Zhaoming Zhang ◽  
Christopher J Howard ◽  
Brendan J Kennedy ◽  
Motohide Matsuda ◽  
Michihiro Miyake
Keyword(s):  
Phase Transition ◽  
Crystal Structures ◽  
Teller Distortion ◽  
Jahn Teller ◽  
Jahn Teller Distortion

Structure of the clinopyroxene-type compound CaCuGe2O6 between 15 and 800 K

2005 ◽  
Vol 61 (4) ◽  
pp. 367-380 ◽  
Author(s):  
Günther J. Redhammer ◽  
Gerold Tippelt ◽  
Michael Merz ◽  
Georg Roth ◽  
Werner Treutmann ◽  
...  
Keyword(s):  
Phase Transition ◽  
Magnetic Susceptibility ◽  
Magnetic Phase ◽  
Metal Layer ◽  
Lattice Parameters ◽  
Zigzag Chain ◽  
Two Dimensional ◽  
Teller Distortion ◽  
Jahn Teller ◽  
Jahn Teller Distortion

CaCuGe2O6 shows a strongly distorted clinopyroxene-type structure with P21/c symmetry at 298 K. The Cu2+ ion at the M1 site is coordinated by six O atoms forming an octahedron, which deviates significantly from ideal geometry. Individual M1 sites are connected via common edges to form an infinite zigzag chain parallel to the crystallographic c axis. The Ca2+ ion at M2 shows a sevenfold coordination. M2 sites are connected to the M1 chain via three common edges, thereby forming a metal layer within the bc plane. Besides the strong Jahn–Teller distortion of the Cu site, the structure of the title compound differs from `normal' clinopyroxenes by a distortion of alternate layers of Ge sites. While the Ge(A) site is fourfold coordinated by O atoms, forming infinite chains of corner-sharing chains parallel to the c axis, the Ge(B) site exhibits a fivefold coordination, thereby forming a true two-dimensional layer of edge-sharing GeO5 bipyramids. Decreasing the temperature causes a magnetic phase transition at 40 K, as monitored by a broad maximum in the magnetic susceptibility and by discontinuities in the lattice parameters. Increasing the temperature causes variations in bond lengths, edge lengths and bond angles. Most prominent is the increase of one bond length of the Ge(B) site and the increase of the tetrahedral bridging angle of the Ge(A) site. At 660 K a crystallographic phase transition is observed where the symmetry changes from P21/c to C2/c. The transition is accompanied by large changes in the lattice parameters which are indicative of distinct topological changes of several structural building units. The high-temperature C2/c structure is similar to that of the germanate clinopyroxene CaMgGe2O6.

Structure Solution of the High-Pressure Phase of CuWO4and Evolution of the Jahn–Teller Distortion

2011 ◽  
Vol 23 (18) ◽  
pp. 4220-4226 ◽  
Author(s):  
J. Ruiz-Fuertes ◽  
A. Friedrich ◽  
J. Pellicer-Porres ◽  
D. Errandonea ◽  
A. Segura ◽  
...  
Keyword(s):  
High Pressure ◽  
High Pressure Phase ◽  
Teller Distortion ◽  
Structure Solution ◽  
Jahn Teller ◽  
Jahn Teller Distortion ◽  
Pressure Phase

High pressure effects on the Jahn–Teller distortion in perovskite La0.5−xBixCa0.5MnO3

2001 ◽  
Vol 321 (1) ◽  
pp. 72-75 ◽  
Author(s):  
Xin Wang ◽  
Qiliang Cui ◽  
Yuewu Pan ◽  
Wei Gao ◽  
Jian Zhang ◽  
...  
Keyword(s):  
High Pressure ◽  
Pressure Effects ◽  
Teller Distortion ◽  
Jahn Teller ◽  
Jahn Teller Distortion ◽  
High Pressure Effects

scholarly journals High-Pressure Energy Dispersive X-Ray Diffraction Investigation of Lithium-Manganese Spinel

2007 ◽  
Vol 130 ◽  
pp. 69-72 ◽  
Author(s):  
Paweł Piszora
Keyword(s):  
High Pressure ◽  
Hexagonal Boron Nitride ◽  
Axial Ratio ◽  
Cubic Phase ◽  
X Ray Diffraction ◽  
Teller Distortion ◽  
Cell Experiment ◽  
Jahn Teller ◽  
Diamond Anvil ◽  
Jahn Teller Distortion

The formation of the tetragonal high-pressure structure, attributed to the Jahn-Teller distortion, was proved. The c/a axial ratio shows an increasing trend towards a stronger tetragonal distortion at high pressure. Rietveld refinement after the pressure relaxation demonstrates the presence of tetragonal artefacts of the high-pressure structure only for the LiMn2O4 sample compressed in hexagonal boron nitride (h-BN), whereas the sample compressed in silicone reveals the pure cubic phase. Confrontation with the result of the first angle-dispersive diamond-anvil-cell experiment is presented.

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