Condensed-Matter Physics & Materials Science Seminar

"Single-atom Impurity Effects in Iron-based Superconductors"

Presented by Shuheng H. Pan, Institute of Physics, Chinese Academy of Sciences

Friday, September 25, 2015, 11:00 am — ISB Bldg. 734, Conf. Rm. 201 (upstairs)

Impurities can break Cooper-pairs into quasi-particles with energy states inside the superconducting gap. The characteristics of such in-gap states reflect accordingly the properties of the superconducting ground state. Therefore, impurity effects in superconductors have always been important subjects in the fundamental study of superconductivity. A single-atom impurity is an ideal model for both experimental and theoretical study of impurity effects on superconductivity. With high resolution STM/S technique, such proposal has been successfully realized. In this talk, I will present some of our high resolution STM/S studies of single-atom impurity effects in iron-based superconductors and discuss their implications to the microscopic mechanism of iron-based superconductivity.

Hosted by: Yimei Zhu

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