Mutual stabilization of charge-density-wave and monoclinic distortion in sulfur at high pressures

Mutual stabilization of charge-density-wave and monoclinic distortion in sulfur at high pressures
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高压下硫中电荷密度波和单斜变形的相互稳定

DOI:
10.1103/physrevresearch.5.043188
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发表时间:
2023
影响因子:
4.2
通讯作者:
Moulding O
Moulding O
中科院分区:
--
文献类型:
--
作者:
Moulding O

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利用拉曼光谱在83 ~ 146之间观察到高压硫-IV相的电荷密度波(CDW)振幅模。这种激发的能量随着压力而软化,但在达到临界压力时仍然是有限的,这表明了弱的一级跃迁。我们的从头算结果表明,有限的能量的激发起源于耦合和相互稳定的CDW调制和单斜晶格畸变。在临界压力下,CDW调制和晶格畸变同时消失。由于CDW相的普遍存在,CDW调制和晶格畸变之间的这种耦合预计与各种各样的元素和化合物有关。
The charge-density-wave (CDW) amplitude mode of the high-pressure sulfur-IV phase is observed between 83 and 146using Raman spectroscopy. The energy of this excitation softens with pressure yet remains finite atup to the critical pressure, which is indicative of a weakly first-order transition. Ourab initiocalculations show that the finite energy of the excitation originates from the coupling and mutual stabilization of the CDW modulation and a monoclinic lattice distortion. At the critical pressure, both the CDW modulation and lattice distortion disappear simultaneously. Due to the prevalence of CDW phases, this coupling between the CDW modulation and lattice distortion is expected to be relevant for a wide variety of elements and compounds.
DOI: 10.1038/ncomms2078
发表时间: 2012-09-01
影响因子: 16.6
作者:
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通讯作者: Rossnagel, K.
J. C. Campuzano 等人:“电子谱及其与高温超导体中的 (π, π) 集体模式的关系”Phys Rev. Lett. 83. 3709-3712 (1999)
DOI: --
发表时间: --
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DOI: 10.1038/nphys2456
发表时间: 2012-12-01
期刊: NATURE PHYSICS
影响因子: 19.6
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