Imaging the real space structure of the spin fluctuations in an iron-based superconductor

Shun Chi; Rama Krishna Prasad Aluru; Stephanie Grothe; A. Kreisel; Udai Raj Singh; Brian M. Andersen; W. N. Hardy; Ruixing Liang; D. A. Bonn; S. A. Burke; Peter Wahl

doi:10.1038/ncomms15996

Imaging the real space structure of the spin fluctuations in an iron-based superconductor

Shun Chi, Rama Krishna Prasad Aluru, Stephanie Grothe, A. Kreisel, Udai Raj Singh, Brian M. Andersen, W. N. Hardy, Ruixing Liang, D. A. Bonn, S. A. Burke, Peter Wahl

Research output: Contribution to journal › Article › peer-review

Abstract

Spin fluctuations are a leading candidate for the pairing mechanism in high temperature superconductors, supported by the common appearance of a distinct resonance in the spin susceptibility across the cuprates, iron-based superconductors and many heavy fermion materials1. The information we have about the spin resonance comes almost exclusively from neutron scattering. Here we demonstrate that by using low-temperature scanning tunneling microscopy and spectroscopy we can characterize the spin resonance in real space. We establish that inelastic tunneling leads to the characteristic "dip-hump" feature seen in tunneling spectra in high temperature superconductors and that this feature arises from excitations of the spin fluctuations. Spatial mapping of this feature near defects allows us to probe non-local properties of the spin susceptibility and to image its real space structure.

Original language	English
Article number	15996
Number of pages	7
Journal	Nature Communications
Volume	8
DOIs	https://doi.org/10.1038/ncomms15996
Publication status	Published - 29 Jun 2017

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Cite this

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title = "Imaging the real space structure of the spin fluctuations in an iron-based superconductor",

abstract = "Spin fluctuations are a leading candidate for the pairing mechanism in high temperature superconductors, supported by the common appearance of a distinct resonance in the spin susceptibility across the cuprates, iron-based superconductors and many heavy fermion materials1. The information we have about the spin resonance comes almost exclusively from neutron scattering. Here we demonstrate that by using low-temperature scanning tunneling microscopy and spectroscopy we can characterize the spin resonance in real space. We establish that inelastic tunneling leads to the characteristic {"}dip-hump{"} feature seen in tunneling spectra in high temperature superconductors and that this feature arises from excitations of the spin fluctuations. Spatial mapping of this feature near defects allows us to probe non-local properties of the spin susceptibility and to image its real space structure.",

author = "Shun Chi and Aluru, \{Rama Krishna Prasad\} and Stephanie Grothe and A. Kreisel and Singh, \{Udai Raj\} and Andersen, \{Brian M.\} and Hardy, \{W. N.\} and Ruixing Liang and Bonn, \{D. A.\} and Burke, \{S. A.\} and Peter Wahl",

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day = "29",

doi = "10.1038/ncomms15996",

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T1 - Imaging the real space structure of the spin fluctuations in an iron-based superconductor

AU - Chi, Shun

AU - Aluru, Rama Krishna Prasad

AU - Grothe, Stephanie

AU - Kreisel, A.

AU - Singh, Udai Raj

AU - Andersen, Brian M.

AU - Hardy, W. N.

AU - Liang, Ruixing

AU - Bonn, D. A.

AU - Burke, S. A.

AU - Wahl, Peter

PY - 2017/6/29

Y1 - 2017/6/29

N2 - Spin fluctuations are a leading candidate for the pairing mechanism in high temperature superconductors, supported by the common appearance of a distinct resonance in the spin susceptibility across the cuprates, iron-based superconductors and many heavy fermion materials1. The information we have about the spin resonance comes almost exclusively from neutron scattering. Here we demonstrate that by using low-temperature scanning tunneling microscopy and spectroscopy we can characterize the spin resonance in real space. We establish that inelastic tunneling leads to the characteristic "dip-hump" feature seen in tunneling spectra in high temperature superconductors and that this feature arises from excitations of the spin fluctuations. Spatial mapping of this feature near defects allows us to probe non-local properties of the spin susceptibility and to image its real space structure.

AB - Spin fluctuations are a leading candidate for the pairing mechanism in high temperature superconductors, supported by the common appearance of a distinct resonance in the spin susceptibility across the cuprates, iron-based superconductors and many heavy fermion materials1. The information we have about the spin resonance comes almost exclusively from neutron scattering. Here we demonstrate that by using low-temperature scanning tunneling microscopy and spectroscopy we can characterize the spin resonance in real space. We establish that inelastic tunneling leads to the characteristic "dip-hump" feature seen in tunneling spectra in high temperature superconductors and that this feature arises from excitations of the spin fluctuations. Spatial mapping of this feature near defects allows us to probe non-local properties of the spin susceptibility and to image its real space structure.

UR - https://www.scopus.com/pages/publications/85021661046

U2 - 10.1038/ncomms15996

DO - 10.1038/ncomms15996

M3 - Article

SN - 2041-1723

VL - 8

JO - Nature Communications

JF - Nature Communications

M1 - 15996

ER -

Imaging the real space structure of the spin fluctuations in an iron-based superconductor

Abstract

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