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Lattice Dynamics of Sb2Se3 from Inelastic Neutron and X‐Ray Scattering
Physica Status Solidi (B) - Basic Solid State Physics ( IF 1.5 ) Pub Date : 2020-04-20 , DOI: 10.1002/pssb.202000063
Markus G. Herrmann 1 , Ralf P. Stoffel 2 , Ilya Sergueev 3 , Hans-Christian Wille 3 , Olaf Leupold 3 , Mohammed Ait Haddouch 1 , Gabriele Sala 4 , Doug L. Abernathy 4 , Jörg Voigt 1 , Raphaël P. Hermann 5 , Richard Dronskowski 2, 6 , Karen Friese 1
Affiliation  

The lattice dynamics of orthorhombic Sb2Se3 is studied by a combination of inelastic neutron and 121Sb nuclear inelastic scattering giving access to the total and Sb partial density of phonon states (DPS). The Se partial DPS is determined from the difference between the total and Sb partial DPS. The total DPS is determined at 39, 150, and 300 K, and an analysis of the temperature‐induced mode shifts in combination with low‐temperature powder diffraction data is provided. Using an earlier reported theoretical approach, the corresponding total and partial DPS of Sb2Se3 are calculated by first‐principles calculations. Herein, a detailed analysis of the Grüneisen parameter, element‐specific and bulk Debye temperatures, and the mean force constants as derived from the experimental data and discrete Fourier transform calculations is provided. In general, the calculations underestimate the strength of the covalent Sb Se bonds.

中文翻译:

非弹性中子和X射线散射Sb2Se3的晶格动力学

通过非弹性中子和121 Sb核非弹性散射的组合研究正交晶Sb 2 Se 3的晶格动力学,从而获得声子态(DPS)的总密度和Sb部分密度。根据总和Sb部分DPS之间的差确定Se部分DPS。总DPS确定为39、150和300 K,并结合低温粉末衍射数据对温度引起的模态偏移进行了分析。使用先前报道的理论方法,Sb 2 Se 3的相应总DPS和部分DPS由第一性原理计算得出。在此,对Grüneisen参数,特定于元素的和整体的德拜温度以及从实验数据和离散傅里叶变换计算中得出的平均力常数进行了详细分析。通常,这些计算低估了共价SbSe 键的强度。
更新日期:2020-04-20
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