Resonance Raman scattering and anomalous anti-Stokes phenomena in CrSBr

IF 5.8 3区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nanoscale Pub Date : 2025-04-09 DOI:10.1039/d5nr00562k

Satyam Sahu, Charlotte Berrezueta-Palacios, Sabrina Juergensen, Kseniia Mosina, Zdenek Sofer, Matěj Velický, Patryk Kusch, Otakar Frank

{"title":"Resonance Raman scattering and anomalous anti-Stokes phenomena in CrSBr","authors":"Satyam Sahu, Charlotte Berrezueta-Palacios, Sabrina Juergensen, Kseniia Mosina, Zdenek Sofer, Matěj Velický, Patryk Kusch, Otakar Frank","doi":"10.1039/d5nr00562k","DOIUrl":null,"url":null,"abstract":"CrSBr, a van der Waals material, stands out as an air-stable magnetic semiconductor with appealing intrinsic properties such as crystalline anisotropy, quasi-1D electronic characteristics, layer-dependent antiferromagnetism, and non-linear optical effects. We investigate the differences between the absorption and emission spectra, focusing on the origin of the emission peak near 1.7 eV observed in the photoluminescence spectrum of CrSBr. Our findings are corroborated by excitation-dependent Raman experiments. Additionally, we explore the anti-Stokes Raman spectra and observe an anomalously high anti-Stokes to Stokes intensity ratio of up to 0.8, which varies significantly with excitation laser power and crystallographic orientation relative to the polarization of the scattered light, highlighting the unique vibrational and electronic interactions in CrSBr. Lastly, we examine stimulated Raman scattering and calculate the Raman gain in CrSBr, which attains a value of 1 × 10<small><sup>8</sup></small> cm/GW, nearly four orders of magnitude higher than that of previously studied three-dimensional systems.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"6 1","pages":""},"PeriodicalIF":5.8000,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nanoscale","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1039/d5nr00562k","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

CrSBr, a van der Waals material, stands out as an air-stable magnetic semiconductor with appealing intrinsic properties such as crystalline anisotropy, quasi-1D electronic characteristics, layer-dependent antiferromagnetism, and non-linear optical effects. We investigate the differences between the absorption and emission spectra, focusing on the origin of the emission peak near 1.7 eV observed in the photoluminescence spectrum of CrSBr. Our findings are corroborated by excitation-dependent Raman experiments. Additionally, we explore the anti-Stokes Raman spectra and observe an anomalously high anti-Stokes to Stokes intensity ratio of up to 0.8, which varies significantly with excitation laser power and crystallographic orientation relative to the polarization of the scattered light, highlighting the unique vibrational and electronic interactions in CrSBr. Lastly, we examine stimulated Raman scattering and calculate the Raman gain in CrSBr, which attains a value of 1 × 10⁸ cm/GW, nearly four orders of magnitude higher than that of previously studied three-dimensional systems.

查看原文本刊更多论文

CrSBr 中的共振拉曼散射和反斯托克斯反常现象

CrSBr是一种范德华材料，作为一种空气稳定的磁性半导体，具有吸引人的内在特性，如晶体各向异性、准一维电子特性、层相关反铁磁性和非线性光学效应。我们研究了CrSBr的吸收光谱和发射光谱之间的差异，重点研究了CrSBr在1.7 eV附近的发光峰的起源。我们的发现被激发依赖性拉曼实验证实。此外，我们研究了CrSBr的反斯托克斯拉曼光谱，观察到异常高的反斯托克斯与斯托克斯强度比高达0.8，该强度比随激发激光功率和相对于散射光偏振的晶体取向而显著变化，突出了CrSBr中独特的振动和电子相互作用。最后，我们研究了受激拉曼散射，并计算了CrSBr中的拉曼增益，得到了1 × 108 cm/GW的值，比以前研究的三维系统的拉曼增益高出近4个数量级。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Nanoscale CHEMISTRY, MULTIDISCIPLINARY-NANOSCIENCE & NANOTECHNOLOGY

CiteScore

12.10

自引率

3.00%

发文量

1628

审稿时长

1.6 months

期刊介绍： Nanoscale is a high-impact international journal, publishing high-quality research across nanoscience and nanotechnology. Nanoscale publishes a full mix of research articles on experimental and theoretical work, including reviews, communications, and full papers.Highly interdisciplinary, this journal appeals to scientists, researchers and professionals interested in nanoscience and nanotechnology, quantum materials and quantum technology, including the areas of physics, chemistry, biology, medicine, materials, energy/environment, information technology, detection science, healthcare and drug discovery, and electronics.