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Epitaxial Monolayers of the Magnetic 2D Semiconductor FeBr2 Grown on Au(111)
Chemistry of Materials ( IF 7.2 ) Pub Date : 2023-11-27 , DOI: 10.1021/acs.chemmater.3c00978 Sebastien E. Hadjadj 1 , Carmen González-Orellana 2 , James Lawrence 3 , Djuro Bikaljević 4, 5 , Marina Peña-Díaz 2 , Pierluigi Gargiani 6 , Lucia Aballe 6 , Jan Naumann 7 , Miguel Ángel Niño 6 , Michael Foerster 6 , Sandra Ruiz-Gómez 8 , Sangeeta Thakur 1 , Ivar Kumberg 1 , James M. Taylor 9, 10 , Jack Hayes 1 , Jorge Torres 1 , Chen Luo 9, 10 , Florin Radu 9 , Dimas G. de Oteyza 3, 11 , Wolfgang Kuch 1 , José Ignacio Pascual 4, 12 , Celia Rogero 2, 3 , Maxim Ilyn 2
Chemistry of Materials ( IF 7.2 ) Pub Date : 2023-11-27 , DOI: 10.1021/acs.chemmater.3c00978 Sebastien E. Hadjadj 1 , Carmen González-Orellana 2 , James Lawrence 3 , Djuro Bikaljević 4, 5 , Marina Peña-Díaz 2 , Pierluigi Gargiani 6 , Lucia Aballe 6 , Jan Naumann 7 , Miguel Ángel Niño 6 , Michael Foerster 6 , Sandra Ruiz-Gómez 8 , Sangeeta Thakur 1 , Ivar Kumberg 1 , James M. Taylor 9, 10 , Jack Hayes 1 , Jorge Torres 1 , Chen Luo 9, 10 , Florin Radu 9 , Dimas G. de Oteyza 3, 11 , Wolfgang Kuch 1 , José Ignacio Pascual 4, 12 , Celia Rogero 2, 3 , Maxim Ilyn 2
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Magnetic two-dimensional (2D) semiconductors have attracted a lot of attention because modern preparation techniques are capable of providing single-crystal films of these materials with precise control of thickness down to the single-layer limit. It opens up a way to study a rich variety of electronic and magnetic phenomena with promising routes toward potential applications. We have investigated the initial stages of epitaxial growth of the magnetic van der Waals semiconductor FeBr2 on a single-crystal Au(111) substrate by means of low-temperature scanning tunneling microscopy (STM), low-energy electron diffraction (LEED), X-ray photoemission spectroscopy (XPS), low-energy electron emission microscopy (LEEM), and X-ray photoemission electron microscopy (XPEEM). Magnetic properties of the one- and two-layer thick films were measured via X-ray absorption spectroscopy (XAS) and X-ray magnetic circular dichroism (XMCD). Our findings show a striking difference in the magnetic behavior of the single layer of FeBr2 and its bulk counterpart, which can be attributed to the modifications in the crystal structure due to the interaction with the substrate.
中文翻译：
Au(111) 上生长的磁性二维半导体 FeBr2 的外延单层
磁性二维（2D）半导体引起了广泛关注，因为现代制备技术能够提供这些材料的单晶薄膜，并且厚度精确控制到单层极限。它开辟了一种研究丰富多样的电子和磁现象的方法，并为潜在应用提供了有希望的途径。我们通过低温扫描隧道显微镜（STM）、低能电子衍射（LEED）、 X 射线光电子能谱 (XPS)、低能电子发射显微镜 (LEEM) 和 X 射线光电子发射显微镜 (XPEEM)。通过 X 射线吸收光谱 (XAS) 和 X 射线磁圆二色性 (XMCD) 测量一层和双层厚膜的磁性。我们的研究结果表明，单层 FeBr 2与其块状对应物的磁性行为存在显着差异，这可归因于由于与基底的相互作用而导致的晶体结构的改变。
更新日期：2023-11-27
中文翻译：
Au(111) 上生长的磁性二维半导体 FeBr2 的外延单层
磁性二维（2D）半导体引起了广泛关注，因为现代制备技术能够提供这些材料的单晶薄膜，并且厚度精确控制到单层极限。它开辟了一种研究丰富多样的电子和磁现象的方法，并为潜在应用提供了有希望的途径。我们通过低温扫描隧道显微镜（STM）、低能电子衍射（LEED）、 X 射线光电子能谱 (XPS)、低能电子发射显微镜 (LEEM) 和 X 射线光电子发射显微镜 (XPEEM)。通过 X 射线吸收光谱 (XAS) 和 X 射线磁圆二色性 (XMCD) 测量一层和双层厚膜的磁性。我们的研究结果表明，单层 FeBr 2与其块状对应物的磁性行为存在显着差异，这可归因于由于与基底的相互作用而导致的晶体结构的改变。
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