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Two-Dimensional Wedge-Shaped Magnetic EuS: Insight into the Substrate Step-Guided Epitaxial Synthesis on Sapphire.
Zhang, Biao; Yun, Chao; Wu, Heng; Zhao, Zijing; Zeng, Yi; Liang, Dong; Shen, Tong; Zhang, Jine; Huang, Xiaoxiao; Song, Jiepeng; Xu, Junjie; Zhang, Qing; Tan, Ping-Heng; Gao, Song; Hou, Yanglong.
Afiliação
  • Zhang B; School of Materials Science and Engineering, Peking University, Beijing100871, China.
  • Yun C; Beijing Key Laboratory for Magnetoelectric Materials and Devices, Beijing Innovation Center for Engineering Science and Advanced Technology, Peking University, Beijing100871, China.
  • Wu H; State Key Laboratory for Mesoscopic Physics, School of Physics, Beijing Key Laboratory for Magnetoeletric Materials and Devices, Peking University, Beijing100871, China.
  • Zhao Z; State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing100083, China.
  • Zeng Y; School of Materials Science and Engineering, Peking University, Beijing100871, China.
  • Liang D; Beijing Key Laboratory for Magnetoelectric Materials and Devices, Beijing Innovation Center for Engineering Science and Advanced Technology, Peking University, Beijing100871, China.
  • Shen T; School of Materials Science and Engineering, Peking University, Beijing100871, China.
  • Zhang J; Beijing Key Laboratory for Magnetoelectric Materials and Devices, Beijing Innovation Center for Engineering Science and Advanced Technology, Peking University, Beijing100871, China.
  • Huang X; State Key Laboratory for Mesoscopic Physics, School of Physics, Beijing Key Laboratory for Magnetoeletric Materials and Devices, Peking University, Beijing100871, China.
  • Song J; School of Materials Science and Engineering, Peking University, Beijing100871, China.
  • Xu J; Beijing Key Laboratory for Magnetoelectric Materials and Devices, Beijing Innovation Center for Engineering Science and Advanced Technology, Peking University, Beijing100871, China.
  • Zhang Q; School of Integrated Circuit Science and Engineering, Beihang University, Beijing100191, China.
  • Tan PH; School of Materials Science and Engineering, Peking University, Beijing100871, China.
  • Gao S; Beijing Key Laboratory for Magnetoelectric Materials and Devices, Beijing Innovation Center for Engineering Science and Advanced Technology, Peking University, Beijing100871, China.
  • Hou Y; School of Materials Science and Engineering, Peking University, Beijing100871, China.
J Am Chem Soc ; 144(43): 19758-19769, 2022 Nov 02.
Article em En | MEDLINE | ID: mdl-36257067
ABSTRACT
Rare earth chalcogenides (RECs) with novel luminescence and magnetic properties offer fascinating opportunities for fundamental research and applications. However, controllable synthesis of RECs down to the two-dimensional (2D) limit still has a great challenge. Herein, 2D wedge-shaped ferromagnetic EuS single crystals are successfully synthesized via a facile molten-salt-assisted chemical vapor deposition method on sapphire. Based on the theoretical simulations and experimental measurements, the mechanisms of aligned growth and wedge-shaped growth are systematically proposed. The wedge-shaped growth is driven by a dual-interaction mechanism, where the coupling between EuS and the substrate steps impedes the lateral growth, and the strong bonding of nonlayered EuS itself facilitates the vertical growth. Through temperature-dependent Raman and photoluminescence characterization, the nanoflakes show a large Raman temperature coefficient of -0.030 cm-1 K-1 and uncommon increasing band gap with temperature. More importantly, by low-temperature magnetic force microscopy characterization, thickness variation of the magnetic signal is revealed within one sample, indicating the great potential of the wedge-shaped nanoflake to serve as a platform for highly efficient investigation of thickness-dependent magnetic properties. This work sheds new light on 2D RECs and will offer a deep understanding of 2D wedge-shaped materials.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: J Am Chem Soc Ano de publicação: 2022 Tipo de documento: Article País de afiliação: China
Texto completo
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: J Am Chem Soc Ano de publicação: 2022 Tipo de documento: Article País de afiliação: China