Robust kagome electronic structure in the topological quantum magnets XMn6Sn6 (X=Dy,Tb,Gd,Y)

DOI: 10.1103/PhysRevB.105.155108

Authors: X. Gu (Tsinghua University) , C. Chen (ShanghaiTech University; ShanghaiTech Laboratory for Topological Physics; Advanced Light Source) , W. S. Wei (High Magnetic Field Laboratory of the Chinese Academy of Sciences) , L. L. Gao (ShanghaiTech University and CAS-Shanghai Science Research Center) , J. Y. Liu (University of Oxford) , X. Du (Tsinghua University) , D. Pei (University of Oxford) , J. S. Zhou (Tsinghua University) , R. Z. Xu (Tsinghua University) , Z. X. Yin (Tsinghua University) , W. X. Zhao (Tsinghua University) , Y. D. Li (Tsinghua University) , C. Jozwiak (Advanced Light Source) , A. Bostwick (Advanced Light Source) , E. Rotenberg (Advanced Light Source) , D. Backes (Diamond Light Source) , L. S. I. Veiga (Diamond Light Source) , S. Dhesi (Diamond Light Source) , T. Hesjedal (Diamond Light Source) , G. Van Der Laan (Diamond Light Source) , H. F. Du (High Magnetic Field Laboratory of the Chinese Academy of Sciences) , W. J. Jiang (Tsinghua University; Frontier Science Center for Quantum Information) , Y. P. Qi (ShanghaiTech University and CAS-Shanghai Science Research Center; ShanghaiTech Laboratory for Topological Physics; Shanghai Tech University) , G. Li (ShanghaiTech University and CAS-Shanghai Science Research Center; ShanghaiTech Laboratory for Topological Physics) , W. J. Shi (ShanghaiTech University; ShanghaiTech University) , Z. K. Liu (ShanghaiTech University and CAS-Shanghai Science Research Center; ShanghaiTech Laboratory for Topological Physics) , Y. L. Chen (Tsinghua University; ShanghaiTech University and CAS-Shanghai Science Research Center; ShanghaiTech Laboratory for Topological Physics) , L. X. Yang (Tsinghua University; Frontier Science Center for Quantum Information)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Review B , VOL 105

State: Published (Approved)
Published: April 2022
Diamond Proposal Number(s): 27482

Abstract: Crystal geometry can greatly influence the emergent properties of quantum materials. As an example, the kagome lattice is an ideal platform to study the rich interplay between topology, magnetism, and electronic correlation. In this work, combining high-resolution angle-resolved photoemission spectroscopy and ab initio calculation, we systematically investigate the electronic structure of X Mn 6 Sn 6 ( X = Dy , Tb , Gd , Y ) family compounds. We observe the Dirac fermion and the flat band arising from the magnetic kagome lattice of Mn atoms. Interestingly, the flat band locates in the same energy region in all compounds studied, regardless of their different magnetic ground states and 4 f electronic configurations. These observations suggest a robust Mn magnetic kagome lattice across the X Mn 6 Sn 6 family, thus providing an ideal platform for the search for, and investigation of, new emergent phenomena in magnetic topological materials.

Journal Keywords: Electronic structure; Topological materials; Angle-resolved photoemission spectroscopy

Subject Areas: Materials, Physics


Instruments: I06-Nanoscience (XPEEM)

Other Facilities: 7.0.2 at ALS; SIS at SLS; BL03U at SSRF

Added On: 14/04/2022 09:05

Discipline Tags:

Quantum Materials Physics Hard condensed matter - structures Magnetism Materials Science

Technical Tags:

Spectroscopy Circular Dichroism (CD) X-ray Absorption Spectroscopy (XAS) X-ray Magnetic Circular Dichroism (XMCD)