4.6 Article

Anharmonic suppression of charge density waves in 2H-NbS2

期刊

PHYSICAL REVIEW B
卷 86, 期 15, 页码 -

出版社

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.86.155125

关键词

-

向作者/读者索取更多资源

The temperature dependence of the phonon spectrum in the superconducting transition-metal dichalcogenide 2H-NbS2 is measured by diffuse and inelastic x-ray scattering. A deep, wide, and strongly temperature-dependent softening of the two lowest-energy longitudinal phonon bands appears along the Gamma Msymmetry line in reciprocal space. In sharp contrast to the isoelectronic compound 2H-NbSe2, the soft phonons energies are finite, even at very low temperature, and no charge density wave instability occurs, in disagreement with harmonic ab initio calculations. We show that 2H-NbS2 is at the verge of the charge density wave transition and its occurrence is only suppressed by the large anharmonic effects. Moreover, the anharmonicity and the electron phonon coupling both show a strong in-plane anisotropy.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.6
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据