Growth of delafossite CuAlO2 single crystals in a reactive crucible. (18th January 2023)

• Record Type: Journal Article
• Authors: Kim, Du Hyung; Kong, Minsik; Kang, Myeongjun; Kim, Minjae; Kim, Seohee; Kim, Youngwook; Yoon, Sangmoon; Ok, Jong Mok
• Is Part Of: Journal of physics. Volume 35:Number 2(2023)
• Publication Date: 2023-01-18
• Subjects: delafossite -- growth mechanism -- CuAlO2; Condensed matter -- Periodicals; Matière condensée -- Périodiques; Vaste stoffen; Vloeistoffen; Natuurkunde; Electronic journals; Computer network resources; 530.4105
• DOI: 10.1088/1361-648X/ac98e9
• Languages: English
• ISSNs: 0953-8984

Abstract

Abstract: Delafossite oxide CuAlO2 has received great attention as a promising p-type conducting oxide. In this work, high-quality CuAlO2 single crystals with a size of several millimeters (mm) are successfully synthesized with a reactive crucible melting method. The crystals are characterized by x-ray diffraction, scanning electron microscopy with energy-dispersive spectroscopy, transport measurement, and magnetic susceptibility measurement. The CuAlO2 single crystals show semiconducting behavior with hole carriers, which is consistent with other crystals grown by the conventional slow-cooling method. This growth method we reported here eliminates the process of removing the remaining flux, allowing easy access to the high-quality single crystals. This new approach to growing high-quality delafossite oxide CuAlO2 with a few mm size is important for new technologies that demand p-type semiconductor-based device fabrication.