The rarely explored, spin‐polarized band engineering, enables direct dynamic control of the magneto‐optical absorption (MOA) and associated magneto‐photocurrent (MPC) by a magnetic field, greatly enhancing the range of applicability of photosensitive semiconductor materials. It is demonstrated that large negative and positive MOA and MPC effects can be tuned alternately in amorphous carbon (a‐C)/ZnO nanowires by controlling the sp²/sp³ ratio of a‐C. A sizeable enhancement of the MPC ratio (≈15%) appears at a relatively low magnetic field (≈0.2 T). Simulated two peaks spin‐polarized density of states is applied to explain that the alternate sign switching of the MOA is mainly related to the charge transfer between ZnO and C. The results indicate that the enhanced magnetic field performance of (a‐C)/ZnO nanowires may have applications in renewable energy‐related fields and tunable magneto‐photonics.

中文翻译：

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在电荷转移工程 C/ZnO 纳米线中利用磁场操纵光吸收和伴随光电流

很少被探索的自旋极化能带工程可以通过磁场直接动态控制磁光吸收（MOA）和相关的磁光电流（MPC），大大提高了光敏半导体材料的适用范围。结果表明，通过控制 a -C^{的 sp 2} /sp ³比率，可以交替调节无定形碳（ a-C ）/ZnO 纳米线中的大负和正 MOA 和 MPC 效应。在相对较低的磁场（约 0.2 T）下，MPC 比率显着增强（约 15%）。应用模拟的两个峰自旋极化态密度来解释MOA的交替符号切换主要与ZnO和C之间的电荷转移有关。结果表明( a-C )/ZnO增强的磁场性能纳米线可能在可再生能源相关领域和可调谐磁光子学中具有应用。