Dresden 2026 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 41: Focus Session: Nickelate Superconductivity: Insights into Unconventional Pairing and Correlation Effects II (joint session TT/DS/MA)
MA 41.1: Vortrag
Donnerstag, 12. März 2026, 09:30–09:45, HSZ/0003
Bulk High-Temperature Superconductivity and Density Waves in Layered Nickelates — •Jun Luo1,2, Jie Dou1,2, Shuo Li1, Qin Xin Shen1,2, Xu Yang Feng1,2, De Min Chai1,2, Ran Sheng Jia1,2, Jie Yang1,2, and Rui Zhou1,2 — 1Institute of Physics, Chinese Academy of Sciences, and Beijing National Laboratory for Condensed Matter Physics, Beijing 100190, China — 2School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China
The recent advances in bilayer nickelates La3Ni2O7 have revealed fascinating high-temperature superconductivity (HTSC) under high-pressure conditions, offering a promising platform to explore unconventional superconducting mechanisms. In this talk, I will first discuss the discovery of bulk HTSC in Pr-doped La2PrNi2O7, where Pr substitution effectively suppresses intergrowth phases, resulting in nearly pure bilayer structures. Superconducting onset temperature reaches 82.5 K at 16 GPa. Clear diamagnetic signals confirm the bulk nature of HTSC. I will also present microscopic evidence of charge and spin density wave (CDW/SDW) orders in La3Ni2O7, revealed through 139La nuclear quadrupole resonance (NQR). Below the density wave transition temperature, we observe distinct line splitting and magnetic broadening, indicating unidirectional CDW order coupled with SDW order. By integrating insights from high-pressure and NQR studies, this work provides a comprehensive understanding of the structural and electronic mechanisms underlying HTSC in bilayer nickelates, paving the way for future experimental and theoretical investigations.
Keywords: Nickelates; High-Temperature Superconductivity; Density waves; Nuclear quadrupole resonance; High pressure