Unveiling the multiband metallic nature of the normal state in the nickelate La3Ni2O7

Bowen Chen; Hengyuan Zhang; Jingyuan Li; Deyuan Hu; Mengwu Huo; Shuyang Wang; Chuanying Xi; Zhaosheng Wang; Hualei Sun; Meng Wang; Bing Shen

doi:10.1103/PhysRevB.111.054519

Unveiling the multiband metallic nature of the normal state in the nickelate La3Ni2O7

Bowen Chen, Hengyuan Zhang, Jingyuan Li, Deyuan Hu, Mengwu Huo, Shuyang Wang, Chuanying Xi, Zhaosheng Wang, Hualei Sun, Meng Wang, Bing Shen

DOI 10.1103/PhysRevB.111.054519 · Physical Review B

T1

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Abstract

The discovery of unconventional superconductivity around 80 K in perovskite nickelates under high pressure has furnished a new platform to explore high-temperature unconventional superconductivity in addition to cuprates. Understanding the normal state of nickelate superconductors is crucial to uncovering the origin of this unconventional superconductivity and gaining further insight into its underlying mechanism. In this paper, we systemically study the transport properties of La3Ni2O7 by tuning the pressure under high magnetic fields. Magnetoresistance (MR) consistently exhibits a quasiquadratic dependence on the magnetic field across all measured pressures and temperatures. Increased pressure enhances the metallicity of the system and leads to a monotonic increase in MR, which follows the extended Kohler's rule. These results suggest the normal state of La3Ni2O7 to be of a multiband metallic nature.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
La3Ni2O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	67	10.3 GPa	onset
La3Ni2O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	75	16.3 GPa	onset
La3Ni2O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	59	18.1 GPa	onset
La2PrNi2O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	80	Pressure not reported	onset
La4Ni3O10 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	30	Pressure not reported	unknown
Pr4Ni3O10 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown