<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>H</mi></math>-linear magnetoresistance in the <math xmlns="http://www.w3.org/1998/Math/MathML"><msup><mi>T</mi><mn>2</mn></msup></math> resistivity regime of overdoped infinite-layer nickelate <math xmlns="http://www.w3.org/1998/Math/MathML"><mrow><msub><mi>La</mi><mrow><mn>1</mn><mo>−</mo><mi>x</mi></mrow></msub><msub><mi>Sr</mi><mi>x</mi></msub><msub><mi>NiO</mi><mn>2</mn></msub></mrow></math>

Yong-Cheng Pan; Tommy Kotte; Toni Helm; Motoki Osada; Atsushi Tsukazaki; Yu-Te Hsu

doi:10.1103/stvg-vbqs

Letter

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

Yong-Cheng Pan ¹, Tommy Kotte ², Toni Helm ², Motoki Osada ³, Atsushi Tsukazaki ^3,4, and Yu-Te Hsu ^1,5,6,*

¹Department of Physics, National Tsing Hua University, Hsinchu 300044, Taiwan
²Dresden High Magnetic Field Laboratory (HLD-EMFL), Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany
³Quantum-Phase Electronics Center and Department of Applied Physics, The University of Tokyo, Tokyo 113-8656, Japan
⁴Institute for Materials Research, Tohoku University, Sendai, Miyagi 980-8577, Japan
⁵Center for Science and Quantum Technology, National Tsing Hua University, Hsinchu 300044, Taiwan
⁶Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 300044, Taiwan

^*Contact author: ythsu@phys.nthu.edu.tw

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Phys. Rev. B 114, L020508 – Published 21 July, 2026

DOI: https://doi.org/10.1103/stvg-vbqs

Abstract

We report a systematic magnetotransport study on high-crystallinity ${La}_{1 - x} {Sr}_{x} {NiO}_{2}$ (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 overdoped LSNO thin films: (1) the magnetoresistance does not follow Kohler's rule but exhibits an $H$ -linear behavior in the high- $H / T$ limit and (2) the normal-state $ρ (T)$ below 30 K consistently follows a $T^{2}$ behavior across the overdoped regime. Our results demonstrate a coexistence of $H$ -linear magnetoresistance and $T^{2}$ resistivity in a model unconventional superconductor and provide information on the transport characteristics of the normal ground state that hosts superconductivity in infinite-layer nickelates.

Physical Review B

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

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H-linear magnetoresistance in the T2 resistivity regime of overdoped infinite-layer nickelate La1−xSrxNiO2

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