Formation of buried superconducting Mo2N by nitrogen-ion-implantation. Issue 72 (16th December 2020)

• Record Type: Journal Article
• Authors: Lee, Joonhyuk; Park, Jun Kue; Lee, Joon Woo; Heo, Yunseok; Oh, Yoon Seok; Lee, Jae S.; Cho, Jinhyung; Jeen, Hyoungjeen
• Is Part Of: RSC advances. Volume 10:Issue 72(2020)
• Page Start: 44339
• Page End: 44343
• Publication Date: 2020-12-16
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/d0ra08533b
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Formation of chemically distinct interfaces, including crystalline buried-superconducting Mo2 N, by low-energy nitrogen ion implantation in an epitaxial molybdenum thin film. Abstract : Nitrogen ion implantation is a useful technique to put nitrogen ions into lattices. In this work, nitrogen ion implantation into epitaxial Mo films is performed to create a buried superconducting γ-Mo2 N. Atomically flat epitaxial (110) Mo films are grown on (0001) Al2 O3 . By impinging nitrogen ions, where the beam energy is fixed to 20 keV, we observe (111) γ-Mo2 N diffraction and the formation of a γ-Mo2 N layer from X-ray reflectivity. Magnetization and transport measurements clearly support a superconducting layer in the implanted film. Our strategy shows that formation of a buried superconducting layer can be achieved through ion implantation and self-annealing.