论文标题
在非磁性金属中具有动态电荷条纹的霍尔效应和对称性破裂
Hall effect and symmetry breaking in non-magnetic metal with dynamic charge stripes
论文作者
论文摘要
已经针对非磁性金属Lub12的单晶组进行了磁化和霍尔效应的全面研究，该晶体具有硼笼的Jahn-Teller不稳定性，并沿着<110>方向形成动态电荷条纹。在最高质量的LUB12的单晶中发现了对磁场h //特定方向的HALL效应的异常阳性贡献。在接近60 K以下的无序基态时，显示出在T〜150 K处产生的贡献会大大增加。大厅效应异常与磁倍率的峰结合出现。提出了允许费米表面拓扑的各种场景，带电载体的松弛时间各向异性和波动电荷条带的丝状结构，以解释具有电子密度不均匀分布的这种金属中磁转运的特征。讨论了在具有电子相和强电荷载体散射的这种非平衡金属中观察到的SDH振荡的起源。
A comprehensive study of magnetoresistance and Hall effect has been performed for the set of the single crystals of non-magnetic metal LuB12 with the Jahn-Teller instability of the boron cage and dynamic charge stripes forming along <110> direction. Anomalous positive contribution to Hall effect for particular direction of magnetic field H//[001] is found in the single crystals of LuB12 of the highest quality. This contribution arising at T~ 150 K is shown to increase drastically when approaching the disordered ground state below 60 K. The Hall effect anomaly is shown to appear in combination with the peak of magnetoresistance. The various scenarios allowing for the topology of Fermi surface, anisotropy of relaxation time for charge carriers and the filamentary structure of fluctuating charge stripes are proposed to explain the features of magnetotransport in this metal with inhomogeneous distribution of electron density. The origin of SdH oscillations, which are observed in this non-equilibrium metal with electron phase separation and strong charge carrier scattering, is discussed.
