Raman spectroscopy of metals, high-temperature superconductors and related materials under high pressure

2003 ◽  
Vol 34 (7-8) ◽  
pp. 532-548 ◽  
Author(s):  
Alexander F. Goncharov ◽  
Viktor V. Struzhkin
Keyword(s):  
Raman Spectroscopy ◽  
High Pressure ◽  
High Temperature ◽  
High Temperature Superconductors

Phase Transition and vibration properties of MnCO3 at high pressure and high-temperature by Raman spectroscopy

2018 ◽  
Vol 38 (3) ◽  
pp. 212-223 ◽  
Author(s):  
Chaoshuai Zhao ◽  
Heping Li ◽  
Jianjun Jiang ◽  
Yu He ◽  
Wen Liang
Keyword(s):  
Phase Transition ◽  
Raman Spectroscopy ◽  
High Pressure ◽  
High Temperature ◽  
Vibration Properties

Elastic Properties of High Temperature Superconductors Derived from High Pressure Experiments

1991 ◽  
pp. 433-455 ◽  
Author(s):  
W. H. Fietz ◽  
H. A. Ludwig ◽  
B. P. Wagner ◽  
K. Grube ◽  
R. Benischke ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Elastic Properties ◽  
High Temperature Superconductors

scholarly journals Probing Phase Separation and Local Lattice Distortions in Cuprates by Raman Spectroscopy

2019 ◽  
Vol 4 (4) ◽  
pp. 87
Author(s):  
Liarokapis
Keyword(s):  
Raman Spectroscopy ◽  
Phase Separation ◽  
High Temperature ◽  
Colossal Magnetoresistance ◽  
High Temperature Superconductors ◽  
Relaxor Ferroelectrics ◽  
Order Parameters ◽  
Characteristic Family ◽  
Local Lattice ◽  
Lattice Distortions

It is generally accepted that high temperature superconductors emerge when extra carriers are introduced in the parent state, which looks like a Mott insulator. Competition of the order parameters drives the system into a poorly defined pseudogap state before acquiring the normal Fermi liquid behavior with further doping. Within the low doping level, the system has the tendency for mesoscopic phase separation, which seems to be a general characteristic in all high Tc compounds, but also in the materials of colossal magnetoresistance or the relaxor ferroelectrics. In all these systems, metastable phases can be created by tuning physical variables, such as doping or pressure, and the competing order parameters can drive the compound to various states. Structural instabilities are expected at critical points and Raman spectroscopy is ideal for detecting them, since it is a very sensitive technique for detecting small lattice modifications and instabilities. In this article, phase separation and lattice distortions are examined on the most characteristic family of high temperature superconductors, the cuprates. The effect of doping or atomic substitutions on cuprates is examined concerning the induced phase separation and hydrostatic pressure for activating small local lattice distortions at the edge of lattice instability.

High-pressure and high-temperature Raman spectroscopy of carbonate ions in aqueous solution

2004 ◽  
Vol 207 (1-2) ◽  
pp. 47-58 ◽  
Author(s):  
Isabelle Martinez ◽  
Carmen Sanchez-Valle ◽  
Isabelle Daniel ◽  
Bruno Reynard
Keyword(s):  
Aqueous Solution ◽  
Raman Spectroscopy ◽  
High Pressure ◽  
High Temperature ◽  
Carbonate Ions

Raman Spectroscopy of Oxide Glasses at High Pressure and High Temperature

1996 ◽  
Vol 27 (10) ◽  
pp. 739-746 ◽  
Author(s):  
Shiv K. Sharma ◽  
Zifu Wang ◽  
Sieger van der Laan
Keyword(s):  
Raman Spectroscopy ◽  
High Pressure ◽  
High Temperature ◽  
Oxide Glasses

A Study for N2 Coherent Anti-Stokes Raman Spectroscopy Thermometry at High Pressure

1983 ◽  
Vol 37 (6) ◽  
pp. 508-512 ◽  
Author(s):  
Haruhiko Kataoka ◽  
Shiro Maeda ◽  
Chiaki Hirose ◽  
Koichi Kajiyama
Keyword(s):  
Raman Spectroscopy ◽  
High Pressure ◽  
High Temperature ◽  
Pressure Range ◽  
High Pressures ◽  
Band Width ◽  
Maximum Height ◽  
Temperature Determination ◽  
Engine Cylinder ◽  
Anti Stokes

N2 coherent anti-Stokes Raman spectroscopy (CARS) thermometry over a pressure range 1 to 50 atm has been studied. The CARS profile at high pressure and high temperature was recorded by using the ignition inside a running engine cylinder. The observed Q-branch profile was theoretically fitted by incorporating the collisional narrowing effect, serving for the temperature determination at various pressures. Because of the narrowing effect, the apparent band width showed little change with pressure above 5 atm in general. It has been suggested that the band width at 1/5 of the maximum height can be a useful measure of temperature, while the usual half-width turns out to be hardly practicable at high pressures.

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