Bulletin of the American Physical Society
APS March Meeting 2018
Monday–Friday, March 5–9, 2018; Los Angeles, California
Session K14: Fe-based Superconductors -- ARPES and STM
8:00 AM–11:00 AM,
Wednesday, March 7, 2018
LACC Room: 304B
Sponsoring Unit: DMP
Chair: Jhinhwan Lee, Korea Advanced Institute of Science and Technology
Abstract: K14.00009 : Stripes developed at the strong limit of nematicity in FeSe films
10:00 AM–10:12 AM
Superconductivity in one monolayer FeSe film on SrTiO3 has attracted enormous attentions. However, the electronic behaviors of FeSe films on SrTiO3 show extraordinary dichotomy as the superconductivity is suppressed and strong nematicity develops for the film thicker than one monolayer. On the other hand, long-range magnetism is absent, despite large local magnetic moment has been found in bulk FeSe. 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, which develops beneath the nematic state. The emergence of stripe-type ordering indicates a magnetic fluctuation, competing with the ordinary collinear antiferromagnetic order in FeSe films. The existence of stripes in iron-based superconductor that resemble the stripe order in cuprates provides a platform to reveal the complex interactions between nematicity, magnetism and superconductivity in high-temperature superconductors.
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