Development of Magnetic Microscopy using RF Photon Assisted Tunneling between Superconductor Electrodes

利用超导电极之间的射频光子辅助隧道技术开发磁显微镜

• 批准号: 21K04873
• 负责人: Shahed SyedMohammadFakruddin
• 金额: $ 2.66万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2021
• 资助国家: 日本
• 起止时间: 2021-04-01 至 2024-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-21K04873/
• 关键词: SC-PAT; superconductor; YSR; IETS; TbPc; Super Conductor; Photo Assisted Tunneling; Spin

To understand the spin properties with atomic scale resolution, the characterization of the superconductor substrate is important. We found a 1T phase island of NbSe2 on a cleaved surface and its magnetic properties. Tunneling spectroscopy at 400 mK shows robust peaks in the superconducting gap, which we assign to the Yu-Shiba-Rusinov (YSR) state originating from the magnetic moment in the superconducting state. The YSR peak appears on a specific position of an island of the 1T phase, not on the surrounding 2H phase area. We assign the origin of the magnetic moment to the curvature of the 1T phase island, which can form a magnetic moment through a rotation of the wave function by a robust spin-orbit coupling, as indicated by a recent theoretical study.

为了理解具有原子尺度分辨率的自旋性质，超导衬底的表征是重要的。我们在解理表面发现了NbSe2的1T相岛，并对其磁性进行了研究。400mK的隧道谱显示了超导禁带中的强峰，我们认为这是由超导态的磁矩引起的Yu-Shiba-Rusinov(YSR)态。YSR峰出现在1T相岛的特定位置，而不是周围的2H相区。我们将磁矩的起源指定为1T相岛的曲率，正如最近的一项理论研究所表明的那样，1T相岛可以通过强自旋轨道耦合通过波函数的旋转来形成磁矩。

项目成果

Probing the local spin states of the Metal Phthalocyanine (TbPc) molecules and their assembly on superconducting NbSe2 surface

探测金属酞菁 (TbPc) 分子的局部自旋态及其在超导 NbSe2 表面上的组装

• 发表时间: 2021
• 作者: Jakub Lustinec;Masao Obata;Ko Hyodo;Takao Kotani;Ladislav Kalvoda;Tatsuki Oda;Syed Mohammad Fakruddin Shahed
• 通讯作者: Syed Mohammad Fakruddin Shahed

Observation of a Yu-Shiba-Rusinov state originating from the magnetic moment in a curved monolayer island of 1T-phase NbSe₂

1T相NbSe₂弯曲单层岛中源自磁矩的Yu-Shiba-Rusinov态的观察

• DOI: 10.1039/d2nr02007f
• 发表时间: 2022
• 期刊: Nanoscale
• 影响因子: 6.7
• 作者: Mohammad Ikram Hossain;Ferdous Ara;Syed Mohammad Fakruddin Shahed;Wang Zhipeng;Komeda Tadahiro
• 通讯作者: Komeda Tadahiro

Superconductor assisted detection of spin in Single molecule magnet (SMM) using scanning tunneling microscopy

使用扫描隧道显微镜超导辅助检测单分子磁体 (SMM) 中的自旋

• 发表时间: 2022
• 作者: Syed Mohammad Fakruddin Shahed;Mohammad Ikram Hossain;Ferdous Ara;Zhipeng Wang and T. Komeda
• 通讯作者: Zhipeng Wang and T. Komeda

nvestigation of the spin properties of the TbPc2 (single molecule magnet) molecules and its fragments on the superconductor (NbSe2) surface using STM and STS

使用 STM 和 STS 研究超导体 (NbSe2) 表面上的 TbPc2（单分子磁体）分子及其碎片的自旋特性

• 发表时间: 2022
• 作者: Syed Mohammad Fakruddin Shahed;Mohammad Ikram Hossain;Ferdous Ara;Zhipeng Wang;Tadahiro Komeda
• 通讯作者: Tadahiro Komeda

STM-IETS Measurement of Exchange Interaction Energy of Radical Ligand and Metal 4f of SMM TbPc2 on Superconductor NbSe2

超导NbSe2上SMM TbPc2自由基配体与金属4f交换相互作用能的STM-IETS测量

• 发表时间: 2021
• 作者: T. Saito;T. Kajitani;S. Yagai;Syed Mohammad Fakruddin Shahed
• 通讯作者: Syed Mohammad Fakruddin Shahed