Oxysulfides and oxyselenides in sheets, formed by a rare earth element and a second metal

Electrically tunable multiple Dirac cones in thin films of the (LaO)2(SbSe2)2 family of materials

“…In addition, the (LaO) 2 layer can also be replaced by (AeF) 2 where Ae ¼ Sr, Ba (refs 24-26). Experimentally, bulk (LaO) 2 (SbSe 2 ) 2 and (AeF) 2 (SbSe 2 ) 2 have been fabricated by the high-temperature ceramic method 20,24 . As shown in Supplementary Note 9 and Supplementary Fig.…”

“…In the crystal structure, we take the experimental lattice constants: a ¼ 4.13 Å and c ¼ 14.17 Å (ref. 20). For the TL thin film, we build a slab model with a vacuum region of 14 Å to decouple the consecutive slabs in the supercell approach.…”

Crystal Structure and Magnetic Properties of a New Oxyselenide of Gadolinium and Titanium: Gd4TiSe4O4

“…In this article, mention of ternary compounds with a rare earth metal and two kinds of anions, namely oxygen and chalcogen, was also made. A few years later, a new family of quaternary compounds with two metal atoms (rare earth and post transition metal) and two types of anions (oxygen and chalcogen (X"S, Se)) was reported by the same team (2). These oxychalcogenides formed by a rare earth element and a second metal crystallize in a layered type structure, with a composite character owing to the alternation of an oxide sheet [¸nO] and a sul"de sheet [¹ V X W ].…”

Synthesis and Characterization of the Rare-Earth Vanadium Oxyselenides Ln7VO4Se8 (Ln=Nd, Sm, Gd)

“…)/C. The "t of the data in the temperature range 50}300 K results in a Curie constant C"52.3 (2) emu K\ mol\ and a paramagnetic temperature "!14.3(7) K. The value of C agrees with that of 58.0 emu K\ mol\ calculated from 7 C(Gd>)#C(spinonly V>) (26).…”