English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

LaAgSb$_{2}$ is a Dirac semimetal showing charge density wave (CDW) order.Previous ARPES results suggest the existence of the Dirac-cone-like structurein the vicinity of the Fermi level along the $\Gamma$-M direction [X. Shi etal., Phys. Rev. B 93, 081105(R) (2016)]. This paper is devoted to a complexanalysis of the electronic band structure of LaAgSb$_{2}$ by means ofangle-resolved photoemission spectroscopy (ARPES) and theoretical calculationswithin the direct ab initio method as well as tight binding model formulation.To investigate the possible surface states we performed the direct DFT slabcalculation and the surface Green function calculation for the (001) surface.The appearance of the surface states, which depends strongly on surface, pointsto the conclusion that LaSb termination is realized in the cleaved crystals.Moreover, the surface states predicted by our calculations at the $\Gamma$ and$X$ points are found by ARPES. Nodal lines, which exist along X--R and M-A pathdue to crystal symmetry, are also observed experimentally. The calculationsreveal another nodal lines, which originate from vanishing of spin-orbitcoupling and are located at X-M-A-R plane at the Brillouin zone boundary. Inaddition, we analyze band structure along the $\Gamma$-M path to verify,whether Dirac surface states can be expected. Their appearance in this regionis not confirmed.

Electronic band structure and surface states in Dirac semimetal LaAgSb$_{2}$