arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2008.04225cond-mat.mtrl-sci
收藏

同位素无序对立方硼砷化物拉曼光谱的影响

Effect of isotope disorder on the Raman spectra of cubic boron arsenide

Akash Rai, Sheng Li, Hanlin Wu, Bing Lv, David G. Cahill

摘要:

砷化硼(c-BAs)是导热材料研究的前沿。我们提出了一个拉曼散射研究的同位素定制的立方砷化硼单晶的11个同位素组成的范围从近纯的c- $^{10}$ BA近纯的c- $^{11}$ BA。我们的研究结果提供了深刻的见解的影响,强质量无序的光学声子和外观的双模行为在混合晶体的拉曼光谱。强的同位素无序也放松了单声子拉曼选择规则,导致由声学声子引起的无序激活拉曼散射。

英文摘要:

Boron arsenide (c-BAs) is at the forefront of research on ultrahigh thermal conductivity materials. We present a Raman scattering study of isotopically tailored cubic boron arsenide single crystals for 11 isotopic compositions spanning the range from nearly pure c-$^{10}$BAs to nearly pure c-$^{11}$BAs. Our results provide insights on the effects of strong mass disorder on optical phonons and the appearance of two-mode behavior in the Raman spectra of mixed crystals. Strong isotope disorder also relaxes the one-phonon Raman selection rules, resulting in disorder-activated Raman scattering by acoustic phonons.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑