TY - JOUR
T1 - Observation of multiple nodal lines in SmSbTe
AU - Regmi, Sabin
AU - Dhakal, Gyanendra
AU - Kabeer, Fairoja Cheenicode
AU - Harrison, Neil
AU - Kabir, Firoza
AU - Sakhya, Anup Pradhan
AU - Gofryk, Krzysztof
AU - Kaczorowski, Dariusz
AU - Oppeneer, Peter M.
AU - Neupane, Madhab
N1 - Funding Information:
Acknowledgments. M.N. acknowledges support from the National Science Foundation (NSF) CAREER Award No. DMR-1847962, the Air Force Office of Scientific Research under Award No. FA9550-17-1-0415, the Air Force Office of Scientific Research MURI Grant No. FA9550-20-1-0322, and the Center for Thermal Energy Transport under Irradiation, an Energy Frontier Research Center funded by the U.S. DOE, Office of Basic Energy Sciences. P.M.O. acknowledges support from the Swedish Research Council (VR) and the Knut and Alice Wallenberg Foundation (Grant No. 2015.0060). Computational resources were provided by the Swedish National Infrastructure for Computing (SNIC) (Grant No. 2018-05973). K.G. acknowledges support from the INL Laboratory Directed Research and Development (LDRD) Program under DOE Idaho Operations Office Contract DE-AC07-05ID14517. N.H. acknowledges support from the U.S. DOE Basic Energy Science program through the project “Science at 100T” at LANL. A portion of this work was performed at the National High Magnetic Field Laboratory, which is supported by the National Science Foundation Cooperative Agreement No. DMR-1644779 and the state of Florida. D.K. was supported by the National Science Centre (Poland) under Research Grant No. 2021/41/B/ST3/01141. We are grateful to Nicholas Clark Plumb, Ming Shi, Hang Li, and Sailong Ju for beamline assistance at PSI, SLS.
Publisher Copyright:
© 2022 American Physical Society.
PY - 2022/3
Y1 - 2022/3
N2 - Having been a ground for various topological fermionic phases, the family of ZrSiS-type 111 materials has been under experimental and theoretical investigations. Within this family of materials, the subfamily LnSbTe (Ln=lanthanideelements) is gaining interest in recent times as the strong correlation effects and magnetism arising from the 4f electrons of the lanthanides can provide an important platform to study the link between topology, magnetism, and correlation. In this Letter, we report the systematic study of the electronic structure of SmSbTe - a member of the LnSbTe subfamily - by utilizing angle-resolved photoemission spectroscopy in conjunction with first-principles calculations, transport, and magnetic measurements. Our experimental results identify multiple Dirac nodes forming the nodal lines along the G-X and Z-R directions in the bulk Brillouin zone (BZ) as predicted by our theoretical calculations. A surface Dirac-like state is also observed at the X¯ point of the surface BZ. Our study highlights SmSbTe as a promising candidate to understand the topological electronic structure of LnSbTe materials.
AB - Having been a ground for various topological fermionic phases, the family of ZrSiS-type 111 materials has been under experimental and theoretical investigations. Within this family of materials, the subfamily LnSbTe (Ln=lanthanideelements) is gaining interest in recent times as the strong correlation effects and magnetism arising from the 4f electrons of the lanthanides can provide an important platform to study the link between topology, magnetism, and correlation. In this Letter, we report the systematic study of the electronic structure of SmSbTe - a member of the LnSbTe subfamily - by utilizing angle-resolved photoemission spectroscopy in conjunction with first-principles calculations, transport, and magnetic measurements. Our experimental results identify multiple Dirac nodes forming the nodal lines along the G-X and Z-R directions in the bulk Brillouin zone (BZ) as predicted by our theoretical calculations. A surface Dirac-like state is also observed at the X¯ point of the surface BZ. Our study highlights SmSbTe as a promising candidate to understand the topological electronic structure of LnSbTe materials.
UR - https://www.scopus.com/pages/publications/85126695989
UR - https://www.mendeley.com/catalogue/16df85c4-2062-311a-9798-fb827f87b30d/
U2 - 10.1103/PhysRevMaterials.6.L031201
DO - 10.1103/PhysRevMaterials.6.L031201
M3 - Article
AN - SCOPUS:85126695989
SN - 2475-9953
VL - 6
JO - Physical Review Materials
JF - Physical Review Materials
IS - 3
M1 - L031201
ER -