Indexed by: Journal paper

First Author: 童非

Correspondence Author: 缪向水

Co-author: 程晓敏,TONG HAO,Chen.Z.P,Wu.Y

Journal: Applied Physics Letters

Affiliation of Author(s): 华中科技大学

Discipline: Engineering

First-Level Discipline: Electronic Science And Technology

Document Type: J

Volume: 97

Issue: 26

Page Number: 261904

DOI number: 10.1063/1.3531664

Date of Publication: 4054-01-01

Abstract: X-ray diffraction and photoelectron spectroscopy of different Co-doped concentration GeTe have been made to identify the vacancies in rock-salt GeTe. The results show that Co occupies germanium vacancy and forms Co–Te bond, but the alloy retains a rock-salt structure when the concentration of doped Co is less than the vacancy ratio in crystalline GeTe. If we construct 8% germanium vacancy and relative distortion in rock-salt GeTe, the magnetism calculation based on spin-polarized density functional theory of Co-doped GeTe agrees well with superconducting quantum interference device magnetometer result. From experiment and calculation results, we can confirm the existence of vacancies in rock-salt GeTe and the ratio is 8%.

Links to published journals: https://pubs.aip.org/aip/apl/article/97/26/261904/339653/Effective-method-to-identify-the-vacancies-in