Quantum oscillations in Noncentrosymmetric Weyl semimetals RAlSi (R = Sm and Ce)

Abstract

Weyl semimetal (WSM) as a new type of quantum state of matter hosting low energy relativistic quasiparticles, has attracted significant attention for both scientific community and potential quantum device applications. Here, we report a comprehensive investigation of the structural, magnetic and transport properties of noncentrosymmetric RAlSi (R = Sm, Ce), which have been predicted to be new magnetic WSM candidates. Both samples exhibit non-saturated magnetoresistance (MR), with ~ 900% for SmAlSi and 80% for CeAlSi at 1.8 K, 9 T. The carrier densities of SmAlSi and CeAlSi display remarkable change around magnetic transition temperatures, signifying that the electronic states are sensitive to magnetic ordering of rare earth elements. At low temperatures, SmAlSi reveals prominent Shubnikov-de Haas (SdH) oscillations associated with the nontrivial Berry phase. High pressure experiments demonstrate that the magnetic order is robust and survival under high pressure. Our results would yield valuable insights of WSM physics and potentials in application to the next-generation spintronic devices in RAX family.

15 pages, 5 figures

References in corpus (12)

• Topological Weyl semimetals in the chiral antiferromagnetic materials Mn3Ge and Mn3Sn
• Topological Magnetic Phase in the Candidate Weyl Semimetal CeAlGe
• Magnetism and anomalous transport in the Weyl semimetal PrAlGe: Possible route to axial gauge fields
• Observation of topological transition of Fermi surface from a spindle-torus to a torus in large bulk Rashba spin-split BiTeCl
• Observation of Weyl fermions in a magnetic non-centrosymmetric crystal
• Anomalous Hall effect in ferrimagnetic metal RMn6Sn6 (R = Tb, Dy, Ho) with clean Mn kagome lattice
• Pressure-induced Topological and Structural Phase Transitions in an Antiferromagnetic Topological Insulator
• Electronic Transport Evidence for Topological Nodal-Line Semimetals of ZrGeSe single crystals
• Observation of Shubnikov-de Haas Oscillations in Large-Scale Weyl Semimetal WTe2 Films
• Quantum oscillations, Magnetic breakdown and thermal Hall effect in Co${}_3$Sn${}_2$S${}_2$
• High Fermi velocities and small cyclotron masses in LaAlGe
• Pressure-induced Superconductivity in Noncentrosymmetric Weyl Semimetals LaAlX (X = Si and Ge)

Cited by in corpus (13)

• Ferrimagnetic Regulation of Weyl Fermions in a Noncentrosymmetric Magnetic Weyl Semimetal
• Sign change of the anomalous Hall effect and the anomalous Nernst effect in Weyl semimetal CeAlSi
• Kramers nodal lines and Weyl fermions in SmAlSi
• Multi-k magnetic structure and large anomalous Hall effect in candidate magnetic Weyl semimetal NdAlGe
• Signature of weakly coupled $f$ electrons and conduction electrons in magnetic Weyl semimetal candidates PrAlSi and SmAlSi
• Magnetic, thermodynamic, and magnetotransport properties of CeGaGe and PrGaGe single crystals
• Optical signatures of type-II Weyl fermions in the noncentrosymmetric semimetals $R$AlSi ($R$=La, Ce, Pr, Nd, Sm)
• Pressure-induced Superconductivity in Zintl Topological Insulator SrIn2As2
• Gate-tunable Lifshitz transition of Fermi arcs and its nonlocal transport signatures
• Structural characterization of the candidate Weyl semimetal CeGaGe
• Single crystalline orthorhombic GdAlGe as a rare earth magnetic Dirac nodal-line metal
• Anomalous Hall effect in the antiferromagnetic Weyl semimetal SmAlSi
• Is it possible to determine unambiguously the Berry phase solely from quantum oscillations?