Dissipationless currents from topologically protected states are promising for disorder-tolerant electronics and quantum computation. Here, we photogenerate giant anisotropic terahertz nonlinear currents with vanishing scattering, driven by laser-induced coherent phonons of broken inversion symmetry in a centrosymmetric Dirac material ZrTe₅. Our work suggests that this phononic terahertz symmetry switching leads to formation of Weyl points, whose chirality manifests in a transverse, helicity-dependent current, orthogonal to the dynamical inversion symmetry breaking axis, via circular photogalvanic effect. The temperature-dependent topological photocurrent exhibits several distinct features: Berry curvature dominance, particle–hole reversal near conical points and chirality protection that is responsible for an exceptional ballistic transport length of ~10 μm. These results, together with first-principles modelling, indicate two pairs of Weyl points dynamically created by B_1u phonons of broken inversion symmetry. Such phononic terahertz control breaks ground for coherent manipulation of Weyl nodes and robust quantum transport without application of static electric or magnetic fields.

来自拓扑保护状态的无耗散电流有望用于容错电子和量子计算。在这里，我们在中心对称狄拉克材料 ZrTe _{5中由激光诱导的具有破坏反转对称性的相干声子驱动，产生具有消失散射的巨大各向异性太赫兹非线性电流}. 我们的工作表明，这种声子太赫兹对称转换导致 Weyl 点的形成，其手性通过圆形光电效应体现在与动态反转对称破坏轴正交的横向、螺旋性相关电流中。与温度相关的拓扑光电流表现出几个明显的特征：贝里曲率优势、锥形点附近的粒子-空穴反转和手性保护，这导致了约 10 μm 的特殊弹道传输长度。这些结果，连同第一性原理建模，表明由 B _{1u动态创建的两对 Weyl 点}破坏反转对称性的声子。这种声子太赫兹控制为外尔节点的相干操纵和稳健的量子传输奠定了基础，而无需应用静态电场或磁场。