View : 7 Download: 0
Switching Magnetism and Superconductivity with Spin-Polarized Current in Iron-Based Superconductor
- Switching Magnetism and Superconductivity with Spin-Polarized Current in Iron-Based Superconductor
- Choi, Seokhwan; Choi, Hyoung Joon; Ok, Jong Mok; Lee, Yeonghoon; Lee, Alex Taekyung; Kuk, Young; Lee, SungBin; Heinrich, Andreas J.; Cheong, Sang-Wook; Bang, Yunkyu; Johnston, Steven; Kim, Jun Sung; Lee, Jhinhwan; Jang, Won-Jun
- Ewha Authors
- Andreas Heinrich
- Issue Date
- Journal Title
- PHYSICAL REVIEW LETTERS
- 0031-9007; 1079-7114
- vol. 119, no. 22
- AMER PHYSICAL SOC
- SCI; SCIE; SCOPUS
- We explore a new mechanism for switching magnetism and superconductivity in a magnetically frustrated iron-based superconductor using spin-polarized scanning tunneling microscopy (SPSTM). Our SPSTM study on single-crystal Sr2VO3 FeAs shows that a spin-polarized tunneling current can switch the Fe-layer magnetism into a nontrivial C-4 (2 x 2) order, which cannot be achieved by thermal excitation with an unpolarized current. Our tunneling spectroscopy study shows that the induced C-4 (2 x 2) order has characteristics of plaquette antiferromagnetic order in the Fe layer and strongly suppresses superconductivity. Also, thermal agitation beyond the bulk Fe spin ordering temperature erases the C-4 state. These results suggest a new possibility of switching local superconductivity by changing the symmetry of magnetic order with spin-polarized and unpolarized tunneling currents in iron-based superconductors.
- Appears in Collections:
- 자연과학대학 > 물리학전공 > Journal papers
- Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.