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TT: Fachverband Tiefe Temperaturen
TT 29: Unconventional Superconductors
TT 29.3: Vortrag
Dienstag, 10. März 2026, 10:00–10:15, CHE/0091
Study of tri-layer Bismuth-based Cuprates through ARPES measurement — •Elisa Auffray1,2, Lenart Dudy2, and Siham Benhabib1 — 1Laboratoire de Physique des Solides, CNRS, Orsay, France — 2Synchrotron Soleil, CEA, CNRS, St Aubin, France
It is now well established that three-layer cuprates exhibit the highest critical temperature within each family, making them particularly interesting systems for studying superconductivity. Due to the presence of an underdoped inner CuO2 plane, the magnetic environment is expected to differ from that of two-layer cuprates, a feature that has indeed been demonstrated by nuclear magnetic resonance measurements. This doping imbalance has also been revealed by ARPES measurements on the three-layer compound Bi2223. The bismuth-based three-layer cuprate is one of the most accessible in terms of synthesis and experimental investigation, and together with Hg1223 it belongs to the cuprates with the highest critical temperatures across the entire family. This makes it an excellent candidate for understanding three-layer physics, as highlighted by the number of recent publications devoted to it. Among these ARPES studies, only a few focus on the antinodal region where superconductivity truly emerges, so systematic comparisons between nodal and antinodal behavior are still lacking. In this presentation, we report our ARPES measurements on Bi2223. We present the momentum dependence of the 70 meV kink, which has previously been studied in the nodal region in superconducting state, as well as a comparison between the normal and superconducting phases.
Keywords: Cuprates; Superconductivity; ARPES; Bi2223