Stripes developed at the strong limit of nematicity in FeSe film

Li, Wei; Zhang, Yan; Deng, Peng; Xu, Zhilin; Mo, S. -K.; Yi, Ming; Ding, Hao; Hashimoto, M.; Moore, R. G.; Lu, D. -H.; Chen, Xi; Shen, Z. -X.; Xue, Qi-Kun

doi:10.1038/nphys4186

Stripes developed at the strong limit of nematicity in FeSe film

Journal Article · Mon Jul 17 00:00:00 EDT 2017 · Nature Physics

DOI:https://doi.org/10.1038/nphys4186· OSTI ID:1425888

^[1]; Zhang, Yan ^[2]; Deng, Peng ^[3]; Xu, Zhilin ^[3]; ^[4]; ^[5]; Ding, Hao ^[3]; Hashimoto, M. ^[6]; Moore, R. G. ^[5]; ^[6]; Chen, Xi ^[7]; ^[8]; Xue, Qi-Kun ^[7]

Tsinghua Univ., Beijing (China). State Key Lab. of Low-Dimensional Quantum Physics. Dept. of Physics; Collaborative Innovation Center of Quantum Matter, Beijing (China); SLAC National Accelerator Lab., Menlo Park, CA (United States); Stanford Univ., CA (United States). Stanford Inst. for Materials and Energy Sciences
Collaborative Innovation Center of Quantum Matter, Beijing (China); SLAC National Accelerator Lab., Menlo Park, CA (United States); Stanford Univ., CA (United States). Stanford Inst. for Materials and Energy Sciences; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source; Peking Univ., Beijing (China). International Center for Quantum Materials. School of Physics
Tsinghua Univ., Beijing (China). State Key Lab. of Low-Dimensional Quantum Physics. Dept. of Physics
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source
SLAC National Accelerator Lab., Menlo Park, CA (United States); Stanford Univ., CA (United States). Stanford Inst. for Materials and Energy Sciences
SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Synchrotron Radiation Lightsource
Tsinghua Univ., Beijing (China). State Key Lab. of Low-Dimensional Quantum Physics. Dept. of Physics; Collaborative Innovation Center of Quantum Matter, Beijing (China)
SLAC National Accelerator Lab., Menlo Park, CA (United States); Stanford Univ., CA (United States). Stanford Inst. for Materials and Energy Sciences. Dept. of Physics and Applied Physics. Geballe Lab. for Advanced Materials

A single monolayer of iron selenide grown on strontium titanate shows an impressive enhancement of superconductivity compared with the bulk, as well as a novel Fermi surface topology, extreme two-dimensionality, and the possibility of phonon-enhanced electron pairing. For films thicker than one unit cell, however, the electronic structure is markedly different, with a drastically suppressed superconductivity and strong nematicity appearing. The physics driving this extraordinary dichotomy of superconducting behaviour is far from clear. In this paper, we use low-temperature scanning tunnelling microscopy to study multilayers of iron selenide grown by molecular beam epitaxy, and find a stripe-type charge ordering instability that develops beneath the nematic state. The charge ordering is visible and pinned in the vicinity of impurities. And as it emerges in the strong limit of nematicity, it suggests that a magnetic fluctuation with a rather small wavevector may be competing with the ordinary collinear antiferromagnetic ordering in multilayer films. Finally, the existence of stripes in iron-based superconductors, which resemble the stripe order in cuprates, not only suggests that electronic anisotropy and correlation are playing an important role, but also provides a platform for probing the complex interactions between nematicity, charge ordering, magnetism and superconductivity in high-temperature superconductors.

View Accepted Manuscript (DOE)

Research Organization:: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States); Tsinghua Univ., Beijing (China)

Sponsoring Organization:: Ministry of Science and Technology of China; National Science Foundation (NSF) (United States); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: AC02-05CH11231; AC02-76SF00515

OSTI ID:: 1425888

Alternate ID(s):: OSTI ID: 1437971

Journal Information:: Nature Physics, Journal Name: Nature Physics Journal Issue: 10 Vol. 13; ISSN 1745-2473

Publisher:: Nature Publishing Group (NPG)Copyright Statement

Country of Publication:: United States

Language:: English

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Spectroscopic evidence of nematic fluctuations in LiFeAs Sun, Zhixiang; Nag, Pranab Kumar; Sykora, Steffen Physical Review B, Vol. 100, Issue 2 https://doi.org/10.1103/physrevb.100.024506	journal	July 2019
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