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Statements

Subject Item
n2:RIV%2F00216275%3A25310%2F11%3A39895556%21RIV13-MSM-25310___
rdf:type
skos:Concept n12:Vysledek
dcterms:description
The structural and vibrational properties of bismuth selenide (Bi2Se3) have been studied by means of x-ray diffraction and Raman scattering measurements up to 20 and 30 GPa, respectively. The measurements have been complemented with ab initio total-energy and lattice dynamics calculations. Our experimental results evidence a phase transition from the low-pressure rhombohedral (R-3m) phase (alfa-Bi2Se3) with sixfold coordination for Bi to a monoclinic C2/m structure (beta-Bi2Se3) with sevenfold coordination for Bi above 10 GPa. The equation of state and the pressure dependence of the lattice parameters and volume of alfa and beta phases of Bi2Se3 are reported. Furthermore, the presence of a pressure-induced electronic topological phase transition in alfa-Bi2Se3 is discussed. Raman measurements evidence that Bi2Se3 undergoes two additional phase transitions around 20 and 28 GPa, likely toward a monoclinic C2/c and a disordered body-centered cubic structure with 8-fold and 9- or 10-fold coordination, respectively. These two high-pressure structures are the same as those recently found at high pressures in Bi2Te3 and Sb2Te3. On pressure release, Bi2Se3 reverts to the original rhombohedral phase after considerable hysteresis. Symmetries, frequencies, and pressure coefficients of the Raman and infrared modes in the different phases are reported and discussed. The structural and vibrational properties of bismuth selenide (Bi2Se3) have been studied by means of x-ray diffraction and Raman scattering measurements up to 20 and 30 GPa, respectively. The measurements have been complemented with ab initio total-energy and lattice dynamics calculations. Our experimental results evidence a phase transition from the low-pressure rhombohedral (R-3m) phase (alfa-Bi2Se3) with sixfold coordination for Bi to a monoclinic C2/m structure (beta-Bi2Se3) with sevenfold coordination for Bi above 10 GPa. The equation of state and the pressure dependence of the lattice parameters and volume of alfa and beta phases of Bi2Se3 are reported. Furthermore, the presence of a pressure-induced electronic topological phase transition in alfa-Bi2Se3 is discussed. Raman measurements evidence that Bi2Se3 undergoes two additional phase transitions around 20 and 28 GPa, likely toward a monoclinic C2/c and a disordered body-centered cubic structure with 8-fold and 9- or 10-fold coordination, respectively. These two high-pressure structures are the same as those recently found at high pressures in Bi2Te3 and Sb2Te3. On pressure release, Bi2Se3 reverts to the original rhombohedral phase after considerable hysteresis. Symmetries, frequencies, and pressure coefficients of the Raman and infrared modes in the different phases are reported and discussed.
dcterms:title
Structural and vibrational study of Bi2Se3 under high pressure Structural and vibrational study of Bi2Se3 under high pressure
skos:prefLabel
Structural and vibrational study of Bi2Se3 under high pressure Structural and vibrational study of Bi2Se3 under high pressure
skos:notation
RIV/00216275:25310/11:39895556!RIV13-MSM-25310___
n12:predkladatel
n13:orjk%3A25310
n3:aktivita
n11:I
n3:aktivity
I
n3:cisloPeriodika
18
n3:dodaniDat
n4:2013
n3:domaciTvurceVysledku
n15:8046352 n15:1102982
n3:druhVysledku
n10:J
n3:duvernostUdaju
n17:S
n3:entitaPredkladatele
n19:predkladatel
n3:idSjednocenehoVysledku
232727
n3:idVysledku
RIV/00216275:25310/11:39895556
n3:jazykVysledku
n8:eng
n3:klicovaSlova
Raman scattering; high pressure efects; Bi2Se3; structural study; lattice dynamics
n3:klicoveSlovo
n7:structural%20study n7:high%20pressure%20efects n7:lattice%20dynamics n7:Bi2Se3 n7:Raman%20scattering
n3:kodStatuVydavatele
US - Spojené státy americké
n3:kontrolniKodProRIV
[37CD985A01A6]
n3:nazevZdroje
Physical Review B
n3:obor
n6:BM
n3:pocetDomacichTvurcuVysledku
2
n3:pocetTvurcuVysledku
13
n3:rokUplatneniVysledku
n4:2011
n3:svazekPeriodika
84
n3:tvurceVysledku
Marin-Borras, V. Vilaplana, Rosario Gomis, O. Perez-Gonzales, E. Kucek, Vladimír Munoz, A. Drašar, Čestmír Manjon, F. J. Segura, A. Santamaria-Perez, D. Rodrigues-Hernandez, P. Gonzales, J. Munoz-Sanjose, V.
n3:wos
000297414000005
s:issn
1098-0121
s:numberOfPages
15
n18:doi
10.1103/PhysRevB.84.184110
n16:organizacniJednotka
25310