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2026 Spring Poster Competition

25–27 Mar 2026
Asia/Taipei timezone

$H$-linear magnetoresistance in the $T^2$ resistivity regime of overdoped infinite-layer nickelate La$_{1-x}$Sr$_x$NiO$_2$

25 Mar 2026, 13:30
5m
Condensed Matter Experiment Poster Talks

Speaker

Yong-Cheng Pan

Description

We report a systematic magnetotransport study on high-crystallinity overdoped La$_{(1-x)}$Sr$_x$NiO$_2$ (LSNO) thin films with x = 0.20-0.24. By conducting pulsed-field transport experiment up to 62 T, we reveal two salient features of the normal-state transport in this LSNO thin films: (1) the magnetoresistivity does not follow the Kohler's scaling rule but exhibit a H-linear behavior in the high H/T limit and (2) the normal-state resistivity below 30 K consistently follows a $T^2$ behavior across the overdoped regime. Our results demonstrate a coexistence of strange-metal and Fermi-liquid transport features in the unconventional superconductor and provide new information on the transport characteristics of the normal ground state that host superconductivity in infinite-layer nickelates.

Author

Yong-Cheng Pan

Co-authors

Dr Tommy Kotte (Dresden High Magnetic Field Laboratory (HLD-EMFL), Helmholtz-Zentrum Dresden-Rossendorf, Dresden 01328, Germany) Dr Toni Helm (Dresden High Magnetic Field Laboratory (HLD-EMFL), Helmholtz-Zentrum Dresden-Rossendorf, Dresden 01328, Germany) Prof. Motoki Osada (Quantum-Phase Electronics Center and Department of Applied Physics, The University of Tokyo, Tokyo 113-8656, Japan) Prof. Atsushi Tsukazaki (Quantum-Phase Electronics Center and Department of Applied Physics, The University of Tokyo, Tokyo 113-8656, Japan and Institute for Materials Research, Tohoku University, Sendai, Miyagi, Japan) Prof. Yu-Te Hsu (Department of Physics, National Tsing Hua University, Hsinchu 300044, Taiwan, Center for Science and Quantum Technology, National Tsing Hua University, Hsinchu 300044, Taiwan and Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 300044, Taiwan)

Presentation materials

LSNO_MR_poster_copu_copy5.pdf