报告题目: |
Stripes developed at the strong limit of nematicity in FeSe Film |
报告人: |
Wei Li 李渭 |
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Department of Physics, Tsinghua University
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报告时间: |
2017-09-19 16:00 |
报告地点: |
Conference Hall 322, Science Building, Tsinghua University |
主办单位: |
高等研究院 |
简介: |
Superconductivity in one monolayer FeSe film grown on SrTiO3 has attracted enormous attentions. For FeSe films thicker than one unite cell, however, the electronic structure is markedly different, with a drastically suppressed superconductivity and strong nematicity appearing. The physics driving this dichotomy of superconducting behavior is far from clear. Here we report on low-temperature scanning tunneling microscopy studies of the multilayer FeSe films grown by molecular beam epitaxy. We find a stripe-type charge ordering instability that develops beneath the nematic state. The emergence of the charge ordering indicates a magnetic fluctuation with a rather small wave vector, competing with the ordinary collinear antiferromagnetic order in FeSe films. The existence of stripes in iron-based superconductor, which resemble the stripe order in cuprates, provides a platform for probing the complex interactions between nematicity, charge ordering, magnetism and superconductivity in high-temperature superconductors. |
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