Electronic signatures of successive itinerant, magnetic transitions in hexagonal La2Ni7

Abstract

We use high-resolution angle-resolved photoemission spectroscopy (ARPES) and density functional theory (DFT) calculations to study the electronic and magnetic properties of La2Ni7, an itinerant magnetic system with a series of three magnetic transition temperatures upon cooling, which end in a weak itinerant antiferromagnetic (wAFM) ground state. Our APRES data reveal several electron and hole pockets that have hexagonal symmetry near the $\Gamma$ point. We observe significant reconstruction of the band structure upon successive magnetic transitions at T1 = 61 K, T2 = 57 K and T3 = 42 K. The experimental data are in a reasonable agreement with DFT calculations, demonstrating their applicability to itinerant antiferromagnet systems. Our results detail the effects of magnetic ordering on the electronic structure in a Ni-based weak antiferromagnet.

17 pages, 4 figures

References in corpus (5)

• Superconductivity induced by Ni doping in BaFe${}_2$As${}_2$
• Emergence of Fermi arcs and novel magnetic splitting in an antiferromagnet
• Rare-earth monopnoctides -- family of antiferromagnets hosting magnetic Fermi arcs
• Small moment antiferromagnetic ordering in single crystalline La2Ni7
• Weak itinerant magnetic phases of La2Ni7

Cited by in corpus (1)

• Quantum critical point followed by Kondo-like behavior due to Cu substitution in itinerant, antiferromagnet ${\text{La}}_2{\text{(Cu}}_x{\text{Ni}}_{1-x}{)}_7$