Conduction electron spin resonance in AlB 2
Conduction electron spin resonance in AlB 2
复制标题
AlB 2 中的传导电子自旋共振
DOI：
10.1088/0953-8984/25/21/216001
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
P. G. Pagliuso and C. Rettori
中科院分区：
文献类型：
--
作者：
L. M. Holanda;L. Mendonca-Ferreira;R. A. Ribeiro;J. M. Osorio-Guillen;G. M. Dalpian;K. Kuga;S. Nakatsuji;Z. Fisk;R. R. Urbano; P. G. Pagliuso and C. Rettori
本文报道了六方AlB 2二硼化合物（P6/mmm，D16 h结构）取向单晶的电子自旋共振实验结果。的X-带电子自旋共振谱显示了金属的戴森共振g值和强度与温度无关。各向异性电子自旋共振谱线宽度ΔH的热展宽跟踪了T ≤ 100 K时电阻率随温度的变化。这些结果证实了观察到的传导电子自旋共振在AlB 2和讨论中与其他硼化物化合物相比。基于我们对AlB 2的主要发现和类似层状蜂窝状结构的电子结构计算，我们得出结论，任何共价B-B层阵列都可能导致传导电子自旋共振信号。这一观察结果可能为复杂f电子系统（如β-YbAlB 4）的非平凡传导电子自旋共振类信号的性质提供新的线索。
This work reports on electron spin resonance experiments in oriented single crystals of the hexagonal AlB 2 diboride compound (P6/mmm, D16h structure) which display conduction electron spin resonance. The X-band electron spin resonance spectra showed a metallic Dysonian resonance with g-value and intensity independent of temperature. The thermal broadening of the anisotropic electron spin resonance linewidth ΔH tracks the T-dependence of the electrical resistivity below T≃ 100 K. These results confirm the observation of a conduction electron spin resonance in AlB 2 and are discussed in comparison with other boride compounds. Based on our main findings for AlB 2 and the calculated electronic structure of similar layered honeycomb-like structures, we conclude that any array of covalent B–B layers potentially results in a conduction electron spin resonance signal. This observation may shed new light on the nature of the non-trivial conduction electron spin resonance-like signals of complex f-electron systems such as β-YbAlB 4.