2026-10-13T03:51:36Z https://api.figshare.com/v2/oai

oai:figshare.com:article/33836011 2026-09-16T09:09:25Z portal_1197 item_type_3 month_year_09_2026

Data for Fermi surface transformation at the pseudogap critical point of a cuprate superconductor Yawen Fang (17493939) Gaël Grissonnanche (24956347) Anaëlle Legros (24956350) Simon Verret (24956353) Francis Laliberte (24956356) Clément Collignon (24956359) Amirreza Ataei (24969058) Maxime Dion (24969061) Jianshi Zhou (1753051) David Graf (1776046) M. J. Lawler (24969064) Paul A. Goddard (1422469) Louis Taillefer (24956362) B. J. Ramshaw (10738750) Fermi surfaces High temperature superconductivity Magnetoresistance Semiconductor doping Energy gap (Physics) Migrated from ePrints The nature of the pseudogap phase remains a major puzzle in our understanding of cuprate high-temperature superconductivity. Whether or not this metallic phase is defined by any of the reported broken symmetries, the topology of its Fermi surface remains a fundamental open question. Here we use angle-dependent magnetoresistance (ADMR) to measure the Fermi surface of the La1.6–xNd0.4SrxCuO4 cuprate. Outside the pseudogap phase, we fit the ADMR data and extract a Fermi surface geometry that is in excellent agreement with angle-resolved photoemission data. Within the pseudogap phase, the ADMR is qualitatively different, revealing a transformation of the Fermi surface. We can rule out changes in the quasiparticle lifetime as the sole cause of this transformation. We find that our data are most consistent with a pseudogap Fermi surface that consists of small, nodal hole pockets, thereby accounting for the drop in carrier density across the pseudogap transition found in several cuprates.<br><br>The archive contains the experimental data from the following figures: Figure 1c Figure 1d Figure S3 Data are listed in the archive as follows Fig??_HxxTyyphizz.dat where ?? = the figure number, xx = the applied magnetic field value in Tesla, yy = the sample temperature in kelvin, and zz = the azimuthal angle in degrees. 2022-03-15T00:00:00Z Dataset Dataset 10.82444/warw.33836011.v1 https://figshare.com/articles/dataset/Data_for_Fermi_surface_transformation_at_the_pseudogap_critical_point_of_a_cuprate_superconductor/33836011 CC BY 4.0