[17p-P10-1~93] 10 Spintronics and Magnetics（Poster）

[17p-P10-28] Quantification of spin-orbit coupling in copper oxide using weak anti-localization

〇Yuya Tazaki¹, Yuito Kageyama¹, Kazuya Ando¹ (1.Keio Univ.)

Keywords:weak anti-localization, spin orbit-coupling

The conversion between an electric current and a spin current through spin-orbit coupling is fundamental to realize spintronic devices. The quantification of the strength of the spin-orbit coupling is crucial to develop efficient spintronic devices. The conversion between an electric current and a spin current through spin-orbit coupling is fundamental to realize spintronic devices. The quantification of the strength of the spin-orbit coupling is crucial to develop efficient spintronic devices. Conventionally, the efficient conversion from an electric current to a spin current has been achieved using heavy metals with strong spin-orbit coupling, such as Pt. However, recently it was discovered that the conversion efficiency of Cu with weak spin-orbit coupling is found to be significantly enhanced through natural oxidation. The conversion efficiency from an electric current into a spin current of naturally-oxidized Cu is comparable to that of Pt. Although the efficient conversion using Cu promises a way to realize efficient spin-orbit devices without using heavy metals, the mechanism of the enhancement of the conversion efficiency through the oxidation remains elusive. Thus, it is important to quantify the oxidation effect on the spin-orbit coupling of Cu. In this study, we characterize the spin-orbit coupling strength of CuO_x by measuring the weak anti-localization effect.