论文标题
浆果相位矫正张量和太阳能整流载体
The Berry Phase Rectification Tensor and The Solar Rectification Vector
论文作者
论文摘要
我们介绍了浆果相位整流张量的操作定义，因为材料的二阶变化是响应理想的电场短脉冲而响应的材料的二阶变化。在时间逆转的对称性下，该张量仅取决于Bloch带的浆果阶段，而不是其能量分散体，使其成为每种材料的内在特性，其中包含从带间偏移电流和带内浆果内浆果曲率曲率偶极子造成的贡献。我们还将太阳能整流矢量作为技术相关的图形，用于与理想的黑体辐射下的散装光电载体相关的功能，类似于Shockley和Queisser的经典太阳能电池模型。我们对Weyl Semimetal TAAS和绝缘体LIASSE2的浆果相位整流张量和太阳能整流量进行了第一原理计算，该载体具有接近太阳辐射强度峰的大型移位电流。
We introduce an operational definition of the Berry Phase Rectification Tensor as the second-order change of polarization of a material in response to an ideal short pulse of an electric field. Under time-reversal symmetry this tensor depends exclusively on the Berry phases of the Bloch bands and not their energy dispersions, making it an intrinsic property to each material which contains contributions from both the inter-band shift currents and the intra-band Berry Curvature Dipole. We also introduce the Solar Rectification Vector as a technologically relevant figure of merit for a bulk photo-current generation under ideal black-body radiation in analogy with the classic solar cell model of Shockley and Queisser. We perform first-principles calculations of the Berry Phase Rectification Tensor and the Solar Rectification Vector for the Weyl semimetal TaAs and the insulator LiAsSe2 which features large shift currents close to the peak of solar radiation intensity.
