Pressure- and temperature-dependent inelastic neutron scattering study of the phase transition and phonon lattice dynamics in<i>para</i>-terphenyl

Cai, Qingan; McIntire, Michael J.; Daemen, Luke L.; Li, Chen W.; Chronister, Eric L.

doi:10.1039/d1cp00190f

Cited by 1 publication

(2 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…T . [22] 𝜔 i is the phonon frequency of ith phonon mode, B is the bulk modulus, which is calculated according to the power X-ray diffraction measurement. [21] Based on our PD data, the 𝛾 T of E 2 2g and A 1 1g are −0.88 and 0.11 respectively.…”

Section: Discussionmentioning

confidence: 99%

“…The isothermal mode Grüneisen parameter can be expressed as:

{\gamma }_{{\rm{iT}}} = \ - \ {( {\frac{{d\ln ({\omega }_{\rm{i}})}}{{d\ln ( {{V}_{\rm{i}}} )}}} )}_{\rm{T}} = \frac{B}{{{\omega }_{\rm{i}}}}{( {\frac{{d{\omega }_{\rm{i}}}}{{dP}}} )}_{\rm{T}}\

. [ 22 ] ω i is the phonon frequency of i th phonon mode, B is the bulk modulus, which is calculated according to the power X‐ray diffraction measurement. [ 21 ] Based on our PD data, the γ T of

E_{2{\rm{g}}}^2

and

A_{1{\rm{g}}}^1

are −0.88 and 0.11 respectively.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Spin–Phonon Interactions and Anharmonic Lattice Dynamics in Fe₃GeTe₂

Cai

Zhang

Luong

et al. 2023

Advanced Physics Research

Self Cite

View full text Add to dashboard Cite

Raman scattering is performed on Fe3GeTe2 (FGT) at temperatures from 8 to 300 K and under pressures from the ambient pressure to 9.43 GPa. Temperature‐dependent and pressure‐dependent Raman spectra are reported. The results reveal respective anomalous softening and moderate stiffening of the two Raman active modes as a result of the increase of pressure. The anomalous softening suggests anharmonic phonon dynamics and strong spin–phonon coupling. Pressure‐dependent density functional theory and phonon calculations are conducted and used to study the magnetic properties of FGT and assign the observed Raman modes, and . The calculations proved the strong spin–phonon coupling for the mode. In addition, a synergistic interplay of pressure‐induced reduction of spin exchange interactions and spin–orbit coupling effect accounts for the softening of the mode as pressure increases.

show abstract

Section: Discussionmentioning

confidence: 99%

“…The isothermal mode Grüneisen parameter can be expressed as:

{\gamma }_{{\rm{iT}}} = \ - \ {( {\frac{{d\ln ({\omega }_{\rm{i}})}}{{d\ln ( {{V}_{\rm{i}}} )}}} )}_{\rm{T}} = \frac{B}{{{\omega }_{\rm{i}}}}{( {\frac{{d{\omega }_{\rm{i}}}}{{dP}}} )}_{\rm{T}}\

. [ 22 ] ω i is the phonon frequency of i th phonon mode, B is the bulk modulus, which is calculated according to the power X‐ray diffraction measurement. [ 21 ] Based on our PD data, the γ T of