Scattering interference signature of a pair density wave state in the cuprate pseudogap phase

Shuqiu Wang; Peayush Choubey; Yi Xue Chong; W Chen; W Ren; H Eisaki; S Uchida; Peter Hirschfeld; J. C. Séamus  Davis

doi:10.1038/s41467-021-26028-x

Scattering interference signature of a pair density wave state in the cuprate pseudogap phase

Shuqiu Wang, Peayush Choubey, Yi Xue Chong, W Chen, W Ren, H Eisaki, S Uchida, Peter Hirschfeld, J. C. Séamus Davis^*

^*Corresponding author for this work

School of Physics

Research output: Contribution to journal › Article (Academic Journal) › peer-review

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Abstract

An unidentified quantum fluid designated the pseudogap (PG) phase is produced by electron-density depletion in the CuO2 antiferromagnetic insulator. Current theories suggest that the PG phase may be a pair density wave (PDW) state characterized by a spatially modulating density of electron pairs. Such a state should exhibit a periodically modulating energy gap
in real-space, and a characteristic quasiparticle scattering interference (QPI) signature
in wavevector space. By studying strongly underdoped Bi2Sr2CaDyCu2O8 at hole-density ~0.08 in the superconductive phase, we detect the 8a0-periodic
modulations signifying a PDW coexisting with superconductivity. Then, by visualizing the temperature dependence of this electronic structure from the superconducting into the pseudogap phase, we find the evolution of the scattering interference signature
that is predicted specifically for the temperature dependence of an 8a0-periodic PDW. These observations are consistent with theory for the transition from a PDW state coexisting with d-wave superconductivity to a pure PDW state in the Bi2Sr2CaDyCu2O8 pseudogap phase.

Original language	English
Article number	6087
Journal	Nature Communications
Volume	12
DOIs	https://doi.org/10.1038/s41467-021-26028-x
Publication status	Published - 19 Oct 2021

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@article{1f6d99b4d3c0453a9131aab83d2e60a5,

title = "Scattering interference signature of a pair density wave state in the cuprate pseudogap phase",

abstract = "An unidentified quantum fluid designated the pseudogap (PG) phase is produced by electron-density depletion in the CuO2 antiferromagnetic insulator. Current theories suggest that the PG phase may be a pair density wave (PDW) state characterized by a spatially modulating density of electron pairs. Such a state should exhibit a periodically modulating energy gap in real-space, and a characteristic quasiparticle scattering interference (QPI) signature in wavevector space. By studying strongly underdoped Bi2Sr2CaDyCu2O8 at hole-density ~0.08 in the superconductive phase, we detect the 8a0-periodic modulations signifying a PDW coexisting with superconductivity. Then, by visualizing the temperature dependence of this electronic structure from the superconducting into the pseudogap phase, we find the evolution of the scattering interference signature that is predicted specifically for the temperature dependence of an 8a0-periodic PDW. These observations are consistent with theory for the transition from a PDW state coexisting with d-wave superconductivity to a pure PDW state in the Bi2Sr2CaDyCu2O8 pseudogap phase.",

author = "Shuqiu Wang and Peayush Choubey and Chong, {Yi Xue} and W Chen and W Ren and H Eisaki and S Uchida and Peter Hirschfeld and Davis, {J. C. S{\'e}amus}",

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doi = "10.1038/s41467-021-26028-x",

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T1 - Scattering interference signature of a pair density wave state in the cuprate pseudogap phase

AU - Wang, Shuqiu

AU - Choubey, Peayush

AU - Chong, Yi Xue

AU - Chen, W

AU - Ren, W

AU - Eisaki, H

AU - Uchida, S

AU - Hirschfeld, Peter

AU - Davis, J. C. Séamus

PY - 2021/10/19

Y1 - 2021/10/19

N2 - An unidentified quantum fluid designated the pseudogap (PG) phase is produced by electron-density depletion in the CuO2 antiferromagnetic insulator. Current theories suggest that the PG phase may be a pair density wave (PDW) state characterized by a spatially modulating density of electron pairs. Such a state should exhibit a periodically modulating energy gap in real-space, and a characteristic quasiparticle scattering interference (QPI) signature in wavevector space. By studying strongly underdoped Bi2Sr2CaDyCu2O8 at hole-density ~0.08 in the superconductive phase, we detect the 8a0-periodic modulations signifying a PDW coexisting with superconductivity. Then, by visualizing the temperature dependence of this electronic structure from the superconducting into the pseudogap phase, we find the evolution of the scattering interference signature that is predicted specifically for the temperature dependence of an 8a0-periodic PDW. These observations are consistent with theory for the transition from a PDW state coexisting with d-wave superconductivity to a pure PDW state in the Bi2Sr2CaDyCu2O8 pseudogap phase.

AB - An unidentified quantum fluid designated the pseudogap (PG) phase is produced by electron-density depletion in the CuO2 antiferromagnetic insulator. Current theories suggest that the PG phase may be a pair density wave (PDW) state characterized by a spatially modulating density of electron pairs. Such a state should exhibit a periodically modulating energy gap in real-space, and a characteristic quasiparticle scattering interference (QPI) signature in wavevector space. By studying strongly underdoped Bi2Sr2CaDyCu2O8 at hole-density ~0.08 in the superconductive phase, we detect the 8a0-periodic modulations signifying a PDW coexisting with superconductivity. Then, by visualizing the temperature dependence of this electronic structure from the superconducting into the pseudogap phase, we find the evolution of the scattering interference signature that is predicted specifically for the temperature dependence of an 8a0-periodic PDW. These observations are consistent with theory for the transition from a PDW state coexisting with d-wave superconductivity to a pure PDW state in the Bi2Sr2CaDyCu2O8 pseudogap phase.

U2 - 10.1038/s41467-021-26028-x

DO - 10.1038/s41467-021-26028-x

M3 - Article (Academic Journal)

C2 - 34667154

SN - 2041-1723

VL - 12

JO - Nature Communications

JF - Nature Communications

M1 - 6087

ER -

Scattering interference signature of a pair density wave state in the cuprate pseudogap phase

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