Signature of weakly coupled f electrons and conduction electrons in magnetic Weyl semimetal candidates PrAlSi and SmAlSi

Lou, Rui1,2,3,4; Fedorov, Alexander2,3,4; Zhao, Lingxiao5; Yaresko, Alexander6; Buechner, Bernd2,7; Borisenko, Sergey2

2023-01-31

10.1103/PhysRevB.107.035158

PHYSICAL REVIEW B   Impact Factor & Quartile

2469-9950

2469-9969

Magnetic topological materials are a class of compounds with the underlying interplay of nontrivial band topology and magnetic spin configuration. Extensive interest has been aroused due to their application potential involved with an array of exotic quantum states. With angle-resolved photoemission spectroscopy and first -principles calculations, here we study the electronic properties of two magnetic Weyl semimetal candidates, PrAlSi and SmAlSi. Though the two compounds harbor distinct magnetic ground states (ferromagnetic and antiferromagnetic for PrAlSi and SmAlSi, respectively) and 4 f shell fillings, we find that they share a quite analogous low-energy band structure. By measurements across the magnetic transitions, we further reveal that there is no evident evolution of the band structure in both compounds and the experimental spectra can be well reproduced by the nonmagnetic calculations, together suggesting a negligible effect of the magnetism on their electronic structures and a possibly weak coupling between the localized 4 f electrons and the itinerant conduction electrons. Our results offer essential insights into the interactions between magnetism, electron correlations, and topological orders in the RAlX (R = light rare earth and X = Si or Ge) family.

SCI

English

NI Journal Papers

Others

National Natural Science Foundation of China["11904144","12004123"] ; Deutsche Forschungsgemeinschaft[SFB 1143] ; Wurzburg-Dresden Cluster of Excellence on Complexity and Topology in Quantum Matter-ct.qmat["EXC 2147","390858490"]

Materials Science ; Physics

Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:000928253500001

AMER PHYSICAL SOC

PHYSICS

Web of Science

1.Lanzhou Univ, Sch Phys Sci & Technol, Lanzhou 730000, Peoples R China
2.IFW Dresden, Leibniz Inst Solid State & Mat Res, D-01069 Dresden, Germany
3.Helmholtz Zentrum Berlin Mat & Energie, Albert Einstein Str 15, D-12489 Berlin, Germany
4.BESSY II, Joint Lab Funct Quantum Mat, D-12489 Berlin, Germany
5.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China
6.Max Planck Inst Solid State Res, D-70569 Stuttgart, Germany
7.Tech Univ Dresden, Inst Solid State & Mat Phys, D-01062 Dresden, Germany

Lou, Rui,Fedorov, Alexander,Zhao, Lingxiao,et al. Signature of weakly coupled f electrons and conduction electrons in magnetic Weyl semimetal candidates PrAlSi and SmAlSi[J]. PHYSICAL REVIEW B,2023,107(3).

Lou, Rui,Fedorov, Alexander,Zhao, Lingxiao,Yaresko, Alexander,Buechner, Bernd,&Borisenko, Sergey.(2023).Signature of weakly coupled f electrons and conduction electrons in magnetic Weyl semimetal candidates PrAlSi and SmAlSi.PHYSICAL REVIEW B,107(3).

Lou, Rui,et al."Signature of weakly coupled f electrons and conduction electrons in magnetic Weyl semimetal candidates PrAlSi and SmAlSi".PHYSICAL REVIEW B 107.3(2023).