Observation of multiple nodal-lines in SmSbTe
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 = lanthanide elements) is gaining interests in recent times as the strong correl...
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| creator | Regmi, Sabin Dhakal, Gyanendra Kabeer, Fairoja Cheenicode Harrison, Neil Kabir, Firoza Anup Pradhan Sakhya Gofryk, Krzysztof Kaczorowski, Dariusz Oppeneer, Peter M Neupane, Madhab |
| description | 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 = lanthanide elements) is gaining interests 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 linking between topology, magnetism, and correlation. In this paper, 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 that arises from the square net plane of the Sb atoms 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. |
| doi_str_mv | 10.48550/arxiv.2108.00489 |
| format | Article |
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Within this family of materials, the subfamily LnSbTe (Ln = lanthanide elements) is gaining interests 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 linking between topology, magnetism, and correlation. In this paper, 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 that arises from the square net plane of the Sb atoms is also observed at the X point of the surface BZ. 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Within this family of materials, the subfamily LnSbTe (Ln = lanthanide elements) is gaining interests 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 linking between topology, magnetism, and correlation. In this paper, 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 that arises from the square net plane of the Sb atoms is also observed at the X point of the surface BZ. 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| subjects | Brillouin zones Electronic structure First principles Lanthanides Magnetic measurement Magnetism Mathematical analysis Photoelectric emission Physics - Materials Science Physics - Mesoscale and Nanoscale Physics Topology |
| title | Observation of multiple nodal-lines in SmSbTe |
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