Structural and vibrational study of Bi2Se3 under high pressure

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F11%3A39895556" target="_blank" >RIV/00216275:25310/11:39895556 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1103/PhysRevB.84.184110" target="_blank" >http://dx.doi.org/10.1103/PhysRevB.84.184110</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevB.84.184110" target="_blank" >10.1103/PhysRevB.84.184110</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Structural and vibrational study of Bi2Se3 under high pressure

Popis výsledku v původním jazyce

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 c

Název v anglickém jazyce

Structural and vibrational study of Bi2Se3 under high pressure

Popis výsledku anglicky

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 c

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

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Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2011

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Physical Review B

ISSN

1098-0121

e-ISSN

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Svazek periodika

84

Číslo periodika v rámci svazku

18

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

15

Strana od-do

"184110-1"-"184110-15"

Kód UT WoS článku

000297414000005

EID výsledku v databázi Scopus

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