Charge ordering in stoichiometric FeTe: Scanning tunneling microscopy and spectroscopy

Li, Wei; Yin, Wei -Guo; Wang, Lili; He, Ke; Ma, Xucun; Xue, Qi -Kun; Chen, Xi

doi:10.1103/PhysRevB.93.041101

Title: Charge ordering in stoichiometric FeTe: Scanning tunneling microscopy and spectroscopy

Journal Article · Mon Jan 04 00:00:00 EST 2016 · Physical Review B

DOI:https://doi.org/10.1103/PhysRevB.93.041101· OSTI ID:1240698

Li, Wei ^[1]; Yin, Wei -Guo ^[2]; Wang, Lili ^[1]; He, Ke ^[1]; Ma, Xucun ^[1]; Xue, Qi -Kun ^[1]; Chen, Xi ^[1]

Tsinghua Univ., Beijing (China); Collaborative Innovation Center of Quantum Matter, Beijing (China)
Brookhaven National Lab. (BNL), Upton, NY (United States)

In this study, we use scanning tunneling microscopy and spectroscopy to reveal a unique stripy charge order in a parent phase of iron-based superconductors in stoichiometric FeTe epitaxy films. The charge order has unusually the same—usually half—period as the spin order. We also found highly anisotropic electron band dispersions being large and little along the ferromagnetic (crystallographic b) and antiferromagnetic (a) directions, respectively. Our data suggest that the microscopic mechanism is likely of the Stoner type driven by interatomic Coulomb repulsion V_ij, and that V_ij and charge fluctuations, so far much neglected, are important to the understanding of iron-based superconductors.

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Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC00112704; AC02-98CH10886

OSTI ID:: 1240698

Alternate ID(s):: OSTI ID: 1234140

Report Number(s):: BNL-111847-2016-JA; PRBMDO; R&D Project: PO015; KC0202030

Journal Information:: Physical Review B, Vol. 93, Issue 4; ISSN 2469-9950

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 3 works

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