Control of a single spin in a semiconductor dot and application for a memory

2015 Fiscal Year Final Research Report

• Project/Area Number: 26600008
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Nanostructural physics
• Research Institution: University of Tsukuba
• Principal Investigator: KURODA Shinji 筑波大学, 数理物質系, 教授 (40221949)
• Co-Investigator(Renkei-kenkyūsha): MITOME Masanori 物質・材料研究機構, 国際ナノアーキテクトニクス研究拠点, 研究員 (50354410)
• Project Period (FY): 2014-04-01 – 2016-03-31
• Keywords: 量子ドット / 磁性スピン / スピントロニクス

Outline of Final Research Achievements

We fabricated the system consisting of a single Cr atom embedded in a self-assembled CdTe dot and investigated the behaviors of single magnetic spin of Cr 3d electrons in the dot. As a result of micro-photoluminescence measurement, we observed that the luminescence from a single dot is split into three lines corresponding the z-component 0, ±1 of Cr 3d, indicating the effect of a large magnetic anisotropy induced by an in-plane strain. In the magneto-photoluminescence measurement with a magnetic field perpendicular to the plane, we observed complicated behaviors due to the Zeeman shift of the exciton and the anticrossing between the different quantum states.

Free Research Field

半導体物理