Enhanced thermoelectric properties of samarium boride

Observation of highly stable and symmetric lanthanide octa-boron inverse sandwich complexes

“…. .La only bonds marginally with the π 1 orbital of B 8 due to symmetry compatibility, accounting for 2.6% of the orbital interactions [see ΔE orb (4) and ΔE orb(4) ′ in SI Appendix, Table S8]. Remarkably, the d-δ u orbital of La.…”

“…lanthanide boride clusters | inverse sandwich | photoelectron spectroscopy | chemical bonding | magnetism B oron forms a wide variety of boride materials, ranging from the superconductor MgB 2 to superhard transition metal borides (1,2). In particular, lanthanide borides represent a class of highly valuable magnetic, optical, superconducting, and thermoelectric materials (3)(4)(5)(6). In the past two decades, extensive experimental and theoretical studies have been conducted to elucidate the structures and chemical bonding of size-selected boron clusters (7)(8)(9)(10)(11), resulting in the discoveries of novel graphene-like (borophene), fullerene-like (borospherene), and nanotubular structures (12)(13)(14)(15)(16).…”

Perfect cubic La-doped boron clusters La6&[La@B24]+/0as the embryos of low-dimensional lanthanide boride nanomaterials

“…1 Boron-based materials have found wide applications in eld emissions, supercapacitors, optical absorptions, photodetectors, and etc. [2][3][4][5][6] A bottom-up approach has received considerable attention in the past two decades to investigate the structural transitions from small boron nanoclusters to boron nanomaterials. Persistent joint photoelectron spectroscopy (PES) and rstprinciples theory investigations in the past two decades by Wang and coworkers have unveiled an unexpectedly rich landscape for size-selected boron clusters from planar or quasiplanar B n À/0 (n ¼ 3-38, 41 and 42) to cage-like borospherenes @B 18 ] which possesses the smallest core-shell structure reported in boron clusters.…”

Improved thermoelectric performance of solid solution Cu4Sn7.5S16 through isoelectronic substitution of Se for S

“…The total uncertainty for ZT value was ∼18%. In addition, the heat capacities ( C p ) for the Se-incorporated sample Cu 4 Sn 7.5 S 16− x Se x ( x  = 1.0) were measured with the measurement system (PPMS, Quantum Design) in the temperature range of 2.0–153 K, and the Debye temperature (Θ D ) was then determined using the equation 19 :Here, β was obtained from a simple Debye model 13,20 in the low temperatures below 10 K,and n is the number of atoms per chemical formula. The lattice contributions ( κ L ) were obtained by subtracting the electronic contribution ( κ e ) from the total κ , i.e., κ L  =  κ  −  κ e .…”