Nematic transitions in iron pnictide superconductors imaged with a quantum gas

Yang, Fan; Taylor, Stephen F.; Edkins, Stephen D.; Palmstrom, Johanna C.; Fisher, Ian R.; Lev, Benjamin L.

doi:10.1038/s41567-020-0826-8

Title: Nematic transitions in iron pnictide superconductors imaged with a quantum gas

Journal Article · Mon Mar 30 00:00:00 EDT 2020 · Nature Physics

DOI:https://doi.org/10.1038/s41567-020-0826-8· OSTI ID:1616847

Yang, Fan ^[1];

^[1]; Edkins, Stephen D. ^[1]; Palmstrom, Johanna C. ^[2]; Fisher, Ian R. ^[2];

^[1]

Stanford Univ., CA (United States)
Stanford Univ., CA (United States). Geballe Lab. for Advanced Materials; SLAC National Accelerator Lab., Menlo Park, CA (United States)

The Scanning Quantum Cryogenic Atom Microscope (SQCRAMscope) uses an atomic Bose–Einstein condensate to measure magnetic fields emanating from solid-state samples. The quantum sensor does so with unprecedented d.c. sensitivity at micrometre resolution, from room to cryogenic temperatures. An additional advantage of the SQCRAMscope is the preservation of optical access to the sample so that magnetometry imaging of, for example, electron transport may be performed in concert with other imaging techniques. Here, we apply this multimodal imaging capability to the study of nematicity in iron pnictide high-temperature superconductors, where the relationship between electronic and structural symmetry breaking resulting in a nematic phase is under debate. We combine the SQCRAMscope with an in situ microscope that measures optical birefringence near the surface. This enables simultaneous and spatially resolved detection of both bulk and near-surface manifestations of nematicity via transport and structural deformation channels, respectively. By performing local measurements of emergent resistivity anisotropy in iron pnictides, we observe sharp, nearly concurrent transport and structural transitions. More broadly, these measurements demonstrate the SQCRAMscope’s ability to reveal important insights into the physics of complex quantum materials.

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Research Organization:: SLAC National Accelerator Lab., Menlo Park, CA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: DGE-114747; AC02-76SF00515; SC0019174; N00014- 17-1-2248; GBMF3502; W911NF1910392

OSTI ID:: 1616847

Journal Information:: Nature Physics, Vol. 16, Issue 5; ISSN 1745-2473

Publisher:: Nature Publishing Group (NPG)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 5 works

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