Infrared and terahertz studies of phase transitions in the CH3NH3PbBr3 perovskite
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F23%3A00573779" target="_blank" >RIV/68378271:_____/23:00573779 - isvavai.cz</a>
Alternative codes found
RIV/68407700:21340/23:00367008
Result on the web
<a href="https://doi.org/10.1103/PhysRevB.107.174113" target="_blank" >https://doi.org/10.1103/PhysRevB.107.174113</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevB.107.174113" target="_blank" >10.1103/PhysRevB.107.174113</a>
Alternative languages
Result language
angličtina
Original language name
Infrared and terahertz studies of phase transitions in the CH3NH3PbBr3 perovskite
Original language description
We investigated the influence of two structural phase transitions in methylammonium lead tri-bromide CH3NH3PbBr3 (MAPbBr3) single crystals on the activity of polar phonons using time-domain THz transmission and far infrared (IR) reflectance spectra. The fitting using the Lorentz model of damped harmonic oscillators also enables us to determine all the polar phonon parameters, IR response functions, and their temperature dependence. The fit of the far IR spectra provides a nearly perfect quantitative description of the measured reflectance at room temperature using three phonons. On cooling, three IR active phonons of the cubic and tetragonal structures split into 15 separate bands, signaling the transformation to the orthorhombic phase below 150 K. This result is compared with the factor group analysis of the polar phonons in all three crystallographic phases.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physical Review B
ISSN
2469-9950
e-ISSN
2469-9969
Volume of the periodical
107
Issue of the periodical within the volume
17
Country of publishing house
US - UNITED STATES
Number of pages
8
Pages from-to
174113
UT code for WoS article
001003448500004
EID of the result in the Scopus database
2-s2.0-85161239370