Persistence of vortexlike phase fluctuations in underdoped to heavily overdoped cuprates
Abstract
The mechanism controlling the superconducting transition temperature Tc0 as a function of doping is a central question in cuprate high-temperature superconductors. While in underdoped cuprates Tc0 is set by global phase coherence rather than the scale of pairing, the role of superconducting phase fluctuations in the overdoped region remains controversial. Here, transport measurements in perpendicular magnetic fields (H) on Bi2+xSr2−x−yLayCuO6+δ (Bi-2201) cuprates reveal in the underdoped region immeasurably small Hall response for T > Tc(H) as a signature of a superconducting regime with vortexlike phase fluctuations. The extent of this regime in T and H is suppressed near optimal doping but strongly enhanced in heavily overdoped Bi-2201. These results demonstrate that vortexlike phase fluctuations play a key role in the field-tuned superconducting transition in the heavily overdoped region, in contrast to conventional mean-field Bardeen-Cooper-Schrieffer description. Their unexpected nonmonotonic doping dependence provides a new perspective on the superconducting transition in cuprates. The role of superconducting phase fluctuations in overdoped cuprates remains controversial. Here, the authors observe an unexpected nonmonotonic doping dependence of phase fluctuations in Bi2+xSr2−x−yLayCuO6+δ, where vortex-like phase fluctuations are enhanced in both under- and overdoped samples.
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BibTeX
@article{terzic2026persistence,
title = {{Persistence of vortexlike phase fluctuations in underdoped to heavily overdoped cuprates}},
author = {Jasminka Terzic and Bal K. Pokharel and Zhizhong Li and Pascale Senzier and Hélène Raffy and Shimpei Ono and Dragana Popović},
journal = {Nature Communications},
year = {2026},
month = nov,
doi = {10.1038/s41467-025-67503-z},
eprint = {2411.06603},
archivePrefix = {arXiv},
url = {https://hal.science/hal-05853654v1},
note = {CC BY-NC-ND},
}
RIS
TY - JOUR
TI - Persistence of vortexlike phase fluctuations in underdoped to heavily overdoped cuprates
AU - Jasminka Terzic
AU - Bal K. Pokharel
AU - Zhizhong Li
AU - Pascale Senzier
AU - Hélène Raffy
AU - Shimpei Ono
AU - Dragana Popović
PY - 2026
DA - 2026/11/05
JO - Nature Communications
DO - 10.1038/s41467-025-67503-z
UR - https://hal.science/hal-05853654v1
AB - The mechanism controlling the superconducting transition temperature T_c^0 as a function of doping is a central question in cuprate high-temperature superconductors. While in underdoped cuprates T_c^0 is set by global phase coherence rather than the scale of pairing, the role of superconducting phase fluctuations in the overdoped region remains controversial. Here, transport measurements in perpendicular magnetic fields (H) on Bi2+xSr2−x−yLayCuO6+δ (Bi-2201) cuprates reveal in the underdoped region immeasurably small Hall response for T > Tc(H) as a signature of a superconducting regime with vortexlike phase fluctuations. The extent of this regime in T and H is suppressed near optimal doping but strongly enhanced in heavily overdoped Bi-2201. These results demonstrate that vortexlike phase fluctuations play a key role in the field-tuned superconducting transition in the heavily overdoped region, in contrast to conventional mean-field Bardeen-Cooper-Schrieffer description. Their unexpected nonmonotonic doping dependence provides a new perspective on the superconducting transition in cuprates. The role of superconducting phase fluctuations in overdoped cuprates remains controversial. Here, the authors observe an unexpected nonmonotonic doping dependence of phase fluctuations in Bi2+xSr2−x−yLayCuO6+δ, where vortex-like phase fluctuations are enhanced in both under- and overdoped samples.
SN - 2041-1723
SN - 2041-1723
ER -