Nematic fluctuations in the cuprate superconductor Bi2Sr2CaCu2O8+δ

Auvray, N.; Loret, B.; Benhabib, S.; Cazayous, M.; Zhong, R. D.; Schneeloch, J.; Gu, G. D.; Forget, A.; Colson, D.; Paul, I.; Sacuto, A.; Gallais, Y.

doi:10.1038/s41467-019-12940-w

Nematic fluctuations in the cuprate superconductor Bi₂Sr₂CaCu₂O_8+δ

Journal Article · Fri Nov 15 00:00:00 EST 2019 · Nature Communications

DOI:https://doi.org/10.1038/s41467-019-12940-w· OSTI ID:1583110

^[1]; Loret, B. ^[1]; Benhabib, S. ^[1]; Cazayous, M. ^[1]; ^[2]; Schneeloch, J. ^[2]; ^[2]; Forget, A. ^[3]; Colson, D. ^[3]; Paul, I. ^[1]; ^[1]; ^[1]

Univ. de Paris (France)
Brookhaven National Lab. (BNL), Upton, NY (United States)
Service de Physique de lÉtat Condensé, Gif-sur-Yvette cedex (France)

Establishing the presence and the nature of a quantum critical point in their phase diagram is a central enigma of the high-temperature superconducting cuprates. It could explain their pseudogap and strange metal phases, and ultimately their high superconducting temperatures. Yet, while solid evidences exist in several unconventional superconductors of ubiquitous critical fluctuations associated to a quantum critical point, in the cuprates they remain undetected until now. Here using symmetry-resolved electronic Raman scattering in the cuprate Bi₂Sr₂CaCu₂O_8+δ, we report the observation of enhanced electronic nematic fluctuations near the endpoint of the pseudogap phase. While our data hint at the possible presence of an incipient nematic quantum critical point, the doping dependence of the nematic fluctuations deviates significantly from a canonical quantum critical scenario. The observed nematic instability rather appears to be tied to the presence of a van Hove singularity in the band structure.

View Accepted Manuscript (DOE)

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

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: SC0012704

OSTI ID:: 1583110

Report Number(s):: BNL--213529-2020-JAAM

Journal Information:: Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 10; ISSN 2041-1723

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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