Dirac-like band structure of LaTESb2 (TE = Ni, Cu, and Pd) superconductors by DFT calculations

Dirac fermions and possible weak antilocalization in LaCuSb2

“…Our results show strong evidence for the presence of Dirac fermions in LaCuSb2. In addition to this observation, there have been potentially interesting claims of intrinsic superconductivity in this system in the literature, under T = 0.9 K 39,40 , that in the context of our discovery, may present an interesting example of a material at the interface of superconductivity and topology 41 . Our measurements, however, of both resistivity and specific heat in multiple samples down to temperatures far below T = 0.9 K, have shown no anomaly consistent with a superconducting phase transition.…”

Electronic States of an Antiferromagnet CeCuSb2 Studied by Linearly Polarized Hard X-Ray Photoemission Spectroscopy

“…The contribution to the total DOS near E F originates from Sb 5p, Ce 5d and Cu 3d states. Similar dependence of DOS was obtained for the LaCuSb 2 [21]. Fig.…”

Antiferromagnetic Ordering and Transport Anomalies in Single-Crystalline CeAgAs2

“…[ 10 ]). It does not show any Dirac-like bands, found for a few other rare-earth (RE) pnictides RETX 2 with X = Sb or Bi [ 28 , 29 , 30 , 31 ]. Probably it is a combination of the AFM ordering (which splits the electronic bands) with the distortion of the nets of As3 atoms from perfect squares that causes the lack of conic-like bands originating from the As 4 p electrons near the Fermi level .…”

“…That feature can be a reason for the semiconducting-like behavior of CeAgAs 2 as well as few similar arsenides with the cis-trans distortions in As3 layers [ 10 , 35 ]. Principally, DOS at consists of the As 4 p contributions like in other RETX 2 compounds [ 28 , 30 , 37 ]. However, the 4 p contributions originating from As1 and As2 are comparable to each other and their sum is very similar to that of the As3 atomic sites at .…”