论文标题

P型trinurium中的刺猬轨道纹理和反对称非对称的非对称性大厅响应

Hedgehog orbital texture in p-type tellurium and the antisymmetric nonreciprocal Hall response

论文作者

Maruggi, Gabriele, Ferreira, Jaime, Baggio-Saitovitch, Elisa, Enderlein, Carsten, Neto, Marcello B. Silva

论文摘要

牙合是一种具有显着电子,光学和传输特性的旋转,P型Weyl半导体。有人认为,其中一些特性可能源自带状结构中的交叉点及其非平凡拓扑纹理的Weyl节点。然而,时间反转不变半导体中的Weyl节点在能量而不是动量上被划分,并位于价(传导)频段的顶部(底部)的深处(远高于),挑战了这种解释。相反,在这里,我们使用4频段的KP Hamiltonian,以$ p-$ type tenturium使用K依赖的自旋轨道交互如何将前两个(免费Weyl节点)和底部的两个(含Weyl节点含有)的价带混合在一起,并产生3D HedgeHog Orbital磁性文本在Uppersost Valence Band Bands Ablowest of Topress topers and powest and powest and powest and powest and powest and powest and powest and powest and powest and powest and。刺猬纹理是一般而言的Weyl fermion物理的重要特征,在凝结物理物理学的背景下,形成了载体的波数据包旋转,锁定在其传播波形上。对于在空间分散的介质中,这种诱导的刺猬纹理/载体旋转稳定了在不同的弱弱分化(反定位)放松方案中向霍尔传输到霍尔传输的两个新颖的非偏置和反对称成分:异常和平面霍尔的效果,通常会被时间反向对称性对称。我们对SN掺杂的滴定柜的AC磁转运测量确认了理论预测,我们的工作证明了Weyl特征通常在具有自然光活性的对映射材料上的传输中通常出现。

Tellurium is a gyrotropic, p-type Weyl semiconductor with remarkable electronic, optical, and transport properties. It has been argued that some of these properties might stem from Weyl nodes at crossing points in the band structure, and their nontrivial topological textures. However, Weyl nodes in time-reversal invariant semiconductors are split up in energy, rather than in momentum, and located deep below (far above) the top (bottom) of the valence (conduction) band, challenging such an interpretation. Here, instead, we use a 4-band kp Hamiltonian for $p-$type tellurium to show how the k-dependent spin-orbit interaction mixes up the top two (Weyl node free) and bottom two (Weyl node containing) valence bands, generating a 3D hedgehog orbital magnetic texture at the uppermost valence band, accessible to transport already at the lowest doping. Hedgehog textures are important signatures of Weyl fermion physics in general and in the context of condensed matter physics arise form the carriers' wave packet rotation being locked to their propagation wavevector. For spatially dispersive media, such an induced hedgehog texture/carrier rotation stabilizes two novel, nonreciprocal and antisymmetric components to the Hall transport within different weak-localization (antilocalization) relaxation regimes: the anomalous and planar Hall effects, usually forbidden by time reversal symmetry. Our AC magnetotransport measurements on Sn-doped tellurium confirm the theoretical predictions and our work demonstrates how Weyl signatures generally appear in transport on enantiomorphic materials with natural optical activity.

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