论文标题
同位素障碍对立方硼的拉曼光谱的影响
Effect of isotope disorder on the Raman spectra of cubic boron arsenide
论文作者
论文摘要
硼砷（C-BAS）是超高热导率材料研究的最前沿。我们提出了一项拉曼散射研究，该研究是对11个同位素组成的同位素定制的立方硼砷单晶的单晶，范围从几乎纯C-$^{10} $ bas到几乎纯C-$^{11} $ bas。我们的结果提供了有关强质量障碍对光学声子的影响以及混合晶体拉曼光谱中两种模式行为的影响。强的同位素障碍还放松了单音拉曼的选择规则，从而导致声音声子散发出无序激活的拉曼散射。
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.
