Raman spectroscopy and pressure-induced structural phase transition in UTe2

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F25%3A00598745" target="_blank" >RIV/68378271:_____/25:00598745 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11320/25:10497344 RIV/61989100:27740/25:10257566

Výsledek na webu

<a href="https://hdl.handle.net/11104/0359403" target="_blank" >https://hdl.handle.net/11104/0359403</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.15302/frontphys.2025.014204" target="_blank" >10.15302/frontphys.2025.014204</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Raman spectroscopy and pressure-induced structural phase transition in UTe2

Popis výsledku v původním jazyce

Results of the Raman scattering experiments, heat capacity measurements, ab initio simulations of the Raman spectra and pressure-induced phase transition in UTe2 single crystal are reported. Assignment of symmetries to particular Raman-active phonons follows directly from a comparative analysis of the measured and calculated Raman spectra. Theoretically determined lattice contribution to the specific heat of UTe2 allows for better description of its heat capacity measured over the temperatures ranging from 30 to 400 K. The orthorhombic-to-tetragonal phase transition pressure of 3.8 GPa is predicted at room temperature in very good agreement with the recent experimental studies. The phase transition remains almost phonon-independent with the transition pressure weakly temperature-dependent below 500 K. The strong local Coulomb correlations between U-5f electrons and spin−orbit interaction are shown to be important for realistic theoretical description of phonons and pressure-induced phase transition in UTe2.

Název v anglickém jazyce

Raman spectroscopy and pressure-induced structural phase transition in UTe2

Popis výsledku anglicky

Results of the Raman scattering experiments, heat capacity measurements, ab initio simulations of the Raman spectra and pressure-induced phase transition in UTe2 single crystal are reported. Assignment of symmetries to particular Raman-active phonons follows directly from a comparative analysis of the measured and calculated Raman spectra. Theoretically determined lattice contribution to the specific heat of UTe2 allows for better description of its heat capacity measured over the temperatures ranging from 30 to 400 K. The orthorhombic-to-tetragonal phase transition pressure of 3.8 GPa is predicted at room temperature in very good agreement with the recent experimental studies. The phase transition remains almost phonon-independent with the transition pressure weakly temperature-dependent below 500 K. The strong local Coulomb correlations between U-5f electrons and spin−orbit interaction are shown to be important for realistic theoretical description of phonons and pressure-induced phase transition in UTe2.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Frontiers of Physics

ISSN

2095-0462

e-ISSN

2095-0470

Svazek periodika

20

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

CN - Čínská lidová republika

Počet stran výsledku

12

Strana od-do

014204

Kód UT WoS článku

001469083600003

EID výsledku v databázi Scopus

2-s2.0-105000349979