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TT: Fachverband Tiefe Temperaturen

TT 5: Nickelates I

TT 5.3: Vortrag

Montag, 18. März 2024, 10:00–10:15, H 3007

Superconductivity in high-pressure La₃Ni₂O₇ — •Pascal Reiss¹, Minu Kim¹, Runze Zhang¹, Pascal Puphal¹, Matthias Hepting¹, Keita Masaki², Kentaro Kitagawa², Bernhard Keimer¹, and Hidenori Takagi^1,2,3 — ¹Max Planck Institute for Solid State Research, 70569 Stuttgart, Germany — ²Department of Physics, The University of Tokyo, Bunkyo, Tokyo, Japan — ³Institute for Functional Matter and Quantum Technologies, University of Stuttgart, Germany

The recent observation of high-temperature superconductivity in La₃Ni₂O₇ under high pressures represents a remarkable discovery. However, superconductivity appears very fragile, and reports so far have differed greatly regarding the observation of a zero-resistance state, pressure range required, and the nature of the normal state.

In this talk, we will present our own high-pressure investigations of single crystal and powder La₃Ni₂O₇ samples and we will discuss several implications regarding the nature of the superconducting phase.

Keywords: Superconductivity; Ruddlesden-Popper structure; High pressures