{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,16]],"date-time":"2026-09-16T08:16:19Z","timestamp":1789546579055,"version":"build-2803163510"},"reference-count":75,"publisher":"MDPI AG","issue":"20","license":[{"start":{"date-parts":[[2022,10,14]],"date-time":"2022-10-14T00:00:00Z","timestamp":1665705600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Polish Ministry of Science and Higher Education","award":["N17\/MNS\/000039"],"award-info":[{"award-number":["N17\/MNS\/000039"]}]},{"name":"Polish Ministry of Science and Higher Education","award":["2017\/25\/B\/ST3\/02586"],"award-info":[{"award-number":["2017\/25\/B\/ST3\/02586"]}]},{"name":"Polish Ministry of Science and Higher Education","award":["2017\/24\/C\/ST3\/00276"],"award-info":[{"award-number":["2017\/24\/C\/ST3\/00276"]}]},{"DOI":"10.13039\/501100004281","name":"National Science Centre (NCN, Poland)","doi-asserted-by":"publisher","award":["N17\/MNS\/000039"],"award-info":[{"award-number":["N17\/MNS\/000039"]}],"id":[{"id":"10.13039\/501100004281","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100004281","name":"National Science Centre (NCN, Poland)","doi-asserted-by":"publisher","award":["2017\/25\/B\/ST3\/02586"],"award-info":[{"award-number":["2017\/25\/B\/ST3\/02586"]}],"id":[{"id":"10.13039\/501100004281","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100004281","name":"National Science Centre (NCN, Poland)","doi-asserted-by":"publisher","award":["2017\/24\/C\/ST3\/00276"],"award-info":[{"award-number":["2017\/24\/C\/ST3\/00276"]}],"id":[{"id":"10.13039\/501100004281","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Materials"],"abstract":"<jats:p>LaAgSb2 is a Dirac semimetal showing charge density wave (CDW) order. Previous angle-resolved photoemission spectroscopy (ARPES) results suggest the existence of the Dirac-cone-like structure in the vicinity of the Fermi level along the \u0393\u2013M direction. This paper is devoted to a complex analysis of the electronic band structure of LaAgSb2 by means of ARPES and theoretical studies within the ab initio method as well as tight binding model formulation. To investigate the possible surface states, we performed the direct DFT slab calculation and the surface Green function calculation for the (001) surface. The appearance of the surface states, which depends strongly on the surface, points to the conclusion that LaSb termination is realized in the cleaved crystals. Moreover, the surface states predicted by our calculations at the \u0393 and X points are found by ARPES. Nodal lines, which exist along the X\u2013R and M\u2013A paths due to crystal symmetry, are also observed experimentally. The calculations reveal other nodal lines, which originate from the vanishing of spin\u2013orbit splitting and are located at the X\u2013M\u2013A\u2013R plane at the Brillouin zone boundary. In addition, we analyze the band structure along the \u0393\u2013M path to verify whether Dirac surface states can be expected. Their appearance in this region is not confirmed.<\/jats:p>","DOI":"10.3390\/ma15207168","type":"journal-article","created":{"date-parts":[[2022,10,17]],"date-time":"2022-10-17T02:29:46Z","timestamp":1665973786000},"page":"7168","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":16,"title":["Electronic Band Structure and Surface States in Dirac Semimetal LaAgSb2"],"prefix":"10.3390","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4314-9601","authenticated-orcid":false,"given":"Marcin","family":"Rosmus","sequence":"first","affiliation":[{"name":"Marian Smoluchowski Institute of Physics, Jagiellonian University, Prof. S. \u0141ojasiewicza 11, 30-348 Krak\u00f3w, Poland"},{"name":"Solaris National Synchrotron Radiation Centre, Jagiellonian University, Czerwone Maki 98, 30-392 Krak\u00f3w, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8377-4615","authenticated-orcid":false,"given":"Natalia","family":"Olszowska","sequence":"additional","affiliation":[{"name":"Solaris National Synchrotron Radiation Centre, Jagiellonian University, Czerwone Maki 98, 30-392 Krak\u00f3w, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9375-7931","authenticated-orcid":false,"given":"Zbigniew","family":"Bukowski","sequence":"additional","affiliation":[{"name":"Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Ok\u00f3lna 2, 50-422 Wroc\u0142aw, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9514-0254","authenticated-orcid":false,"given":"Pawe\u0142","family":"Starowicz","sequence":"additional","affiliation":[{"name":"Marian Smoluchowski Institute of Physics, Jagiellonian University, Prof. S. \u0141ojasiewicza 11, 30-348 Krak\u00f3w, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6339-2986","authenticated-orcid":false,"given":"Przemys\u0142aw","family":"Piekarz","sequence":"additional","affiliation":[{"name":"Institute of Nuclear Physics, Polish Academy of Sciences, W. E. Radzikowskiego 152, 31-342 Krak\u00f3w, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5566-2656","authenticated-orcid":false,"given":"Andrzej","family":"Ptok","sequence":"additional","affiliation":[{"name":"Institute of Nuclear Physics, Polish Academy of Sciences, W. E. Radzikowskiego 152, 31-342 Krak\u00f3w, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2022,10,14]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"3045","DOI":"10.1103\/RevModPhys.82.3045","article-title":"Colloquium: Topological insulators","volume":"82","author":"Hasan","year":"2010","journal-title":"Rev. Mod. Phys."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"1057","DOI":"10.1103\/RevModPhys.83.1057","article-title":"Topological insulators and superconductors","volume":"83","author":"Qi","year":"2011","journal-title":"Rev. Mod. 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