Polarization-Sensitive Photothermoelectric Response Based on In-Plane Anisotropic Antiferromagnetic Semiconductor CrSBr

IF 6.5 1区物理与天体物理 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Photonics Pub Date : 2025-04-29 DOI:10.1021/acsphotonics.5c00065

Jiayuan Zhou, Yuhan Yang, Shasha Li, Yeqin Li, Kaipeng Ni, Ying Li, Aljoscha Söll, Wenshuai Gao, Xuegang Chen, Yuxuan Jiang, Liang Li, Yong Yan, Chunguang Hu, Wanfu Shen, Zdenek Sofer, Penglai Gong, Mingliang Tian, Xue Liu

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引用次数: 0

Abstract

Two-dimensional (2D) magnetic materials are driving plenty of attention due to their scientific and technological significance. In-plane anisotropy in such a system further broadens their application areas especially in various angle-resolved functional devices. Here, we report an air-stable 2D antiferromagnetic semiconductor (CrSBr) with a strong intrinsic optical and optoelectronic in-plane anisotropy. First, the results of polarization absorption spectra demonstrate the presence of a linear dichroism (LD) transition in CrSBr, which shows consistency with our density functional theory (DFT) calculations. Besides, representative angle-resolved reflection and refraction in CrSBr flakes have been further characterized, indicating their anisotropic light–matter interactions. Moreover, a polarized photodetector based on the photothermoelectric (PTE) effect mechanism is fabricated successfully, with the dichroic ratio of I_p-max/I_p-min as measured up to 2.26 under 850 nm excitation. These results indicate a promising potential to advance the application of 2D van der Waals magnetic materials in polarization-sensitive optics, optoelectronic devices, and opto-spintronics.

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基于面内各向异性反铁磁半导体CrSBr的极化敏感光热电响应

二维（2D）磁性材料由于其科学和技术意义而受到广泛关注。该系统的面内各向异性进一步拓宽了其应用领域，特别是在各种角度分辨功能器件中。在这里，我们报道了一种空气稳定的二维反铁磁半导体（CrSBr），它具有很强的内在光学和光电子各向异性。首先，极化吸收光谱结果表明CrSBr中存在线性二色性（LD）跃迁，这与我们的密度泛函理论（DFT）计算结果一致。此外，进一步表征了CrSBr薄片中具有代表性的角分辨反射和折射，表明它们具有各向异性的光-物质相互作用。此外，成功制备了基于光热电效应机制的偏振光电探测器，在850 nm激发下测得Ip-max/Ip-min二色比高达2.26。这些结果表明二维范德华磁性材料在偏振敏感光学、光电子器件和光自旋电子学中的应用具有很大的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

ACS Photonics NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

11.90

自引率

5.70%

发文量

438

审稿时长

2.3 months

期刊介绍： Published as soon as accepted and summarized in monthly issues, ACS Photonics will publish Research Articles, Letters, Perspectives, and Reviews, to encompass the full scope of published research in this field.