First principles study on the electric field induced superconductivity at surfaces and interfaces

2016 Fiscal Year Final Research Report

• Project/Area Number: 26400325
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Condensed matter physics I
• Research Institution: National Institute for Materials Science
• Principal Investigator: Ikutaro Hamada 国立研究開発法人物質・材料研究機構, エネルギー・環境材料研究拠点, 主任研究員 (80419465)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 表面・界面 / 格子振動 / 応答関数 / 誘電関数

Outline of Final Research Achievements

Recently, electric field induced superconductivity at surfaces/interfaces have been reported and attracted much attention in the field of condensed matter physics. However, the microscopic mechanism of the electric field induced superconductivity is not yet clarified. This is because there have not been methods to calculate phonon and electron-phonon interaction of surface/interface under the electric field. In this work, we have developed a method to calculate the phonon of surface/interface under the electric field from first principle. We have also developed an efficient methods and code to compute the screened Coulomb potential, which is necessary to calculate the superconducting transition temperature.

Free Research Field

物性理論