Topic
Antimonide
About: Antimonide is a research topic. Over the lifetime, 972 publications have been published within this topic receiving 10981 citations. The topic is also known as: antimonides.
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TL;DR: In this article, a large scale investigation into the effects of alloy layer disorder on emission in antimonide-based superlattices is reported, and the potential utility of these systems in infrared (IR) optoelectronic technologies is reviewed and issues inhibiting their realization identified.
Abstract: A large scale investigation into the effects of alloy layer disorder on emission in antimonide-based superlattices is reported. The potential utility of these systems in infrared (IR) optoelectronic technologies is reviewed and issues inhibiting their realization identified. The Ga0.7In0.3Sb alloy layer is modeled using both the conventional virtual crystal approximation and models which describe microscopic disorder, clustering, and atomistic relaxation. The structures have recently been fabricated for IR laser applications and we investigate the influence of the alloy description on the emission line shapes. For each superlattice we find that the emission linewidth and peak height is very sensitive to the microscopic details of the alloy potential. Comparing the various superlattice systems, which differ regarding the InAs layer widths, we find that their linewidth values (eV) are each of the same order of magnitude for a given population of excited carriers. While values show a strong dependence on the...
5 citations
20 Sep 2011
TL;DR: In this paper, the synthesis and single-crystal X-ray structure determination of the new antimonide oxide, Ba5Cd2Sb4O2, were reported.
Abstract: Synthesis and single-crystal X-ray structure determination of the new antimonide oxide, Ba5Cd2Sb4O2 are reported. Ba5Cd2Sb4O2 crystallizes in the monoclinic space group C2/m (No. 12) with unit cell parameters: a = 17.247(7) A, b = 4.9279(18) A, c = 12.240(5) A, and β = 132.558(4)°; Z = 2. Its crystal structure can be described as a polyanionic [Cd2Sb4]6– sub-lattice made up of fused CdSb4 tetrahedra, stacked between puckered slabs of oxo-anions, O2–, and Ba2+ cations. This structure can also be described as a “double-salt”, i.e., a structure composed of fragments from the Zintl phase Ba3Cd2Sb4 intercalated by two BaO-like moieties. The topological similarities between the structures of these compounds are discussed.
5 citations
TL;DR: In this article, an antimonide-based quantum dot (Sb-based QD) vertical-cavity surface-emitting laser (VCSEL) was developed to operate in the 1.3-and 1.55-μm optical communications wavebands.
Abstract: Antimonide-based quantum dot (Sb-based QD) vertical-cavity surface-emitting lasers (VCSELs) were developed to operate in the 1.3- and 1.55-μm optical communications wavebands. The Sb-based QD–VCSELs, which contain high-density InGaSb QDs that are Sb-based material, were fabricated on (0 0 1)-oriented GaAs substrates. The high-density InGaSb QDs, used an active media, were created by using a useful method of a silicon atom irradiation. The Sb-based QD–VCSELs in continuous wave operation at room temperature under optically pumped conditions emitted long wavelengths at 1.25 and 1.55 μm with a low-threshold power.
5 citations
TL;DR: In this paper , the spin-dependent photoemission properties of alkali antimonide semiconductor cathodes are predicted based on the detected optical spin orientation effect and DFT band structure calculations.
Abstract: New spin-dependent photoemission properties of alkali antimonide semiconductor cathodes are predicted based on the detected optical spin orientation effect and DFT band structure calculations. Using these results, the Na2KSb/Cs3Sb heterostructure is designed as a spin-polarized electron source in combination with the Al0.11Ga0.89As target as a spin detector with spatial resolution. In the Na2KSb/Cs3Sb photocathode, spin-dependent photoemission properties were established through detection of a high degree of photoluminescence polarization and high polarization of the photoemitted electrons. It was found that the multi-alkali photocathode can provide electron beams with emittance very close to the limits imposed by the electron thermal energy. The vacuum tablet-type sources of spin-polarized electrons have been proposed for accelerators, which can exclude the construction of the photocathode growth chambers for photoinjectors.Received 10 May 2022Accepted 20 September 2022DOI:https://doi.org/10.1103/PhysRevLett.129.166802© 2022 American Physical SocietyPhysics Subject Headings (PhySH)Research AreasElectron emissionSpin injectionSpin optoelectronicsSpin polarizationPhysical SystemsDevice fabricationElectron sourcesLayered semiconductorsSolid-state detectorsTechniquesDensity functional theoryPhotoemission spectroscopyPhotoluminescenceAccelerators & BeamsCondensed Matter, Materials & Applied Physics
5 citations
TL;DR: Jansen et al. as mentioned in this paper synthesize a defect variant of Sc2Sb, called TbçSbsOs, from terbium metal, antimony, and Sb203.
Abstract: 05Sb5Tb9, tetragonal, PAI η (no. 85), a = 9.862(1) Â, c = 8.838(2) Â, V = 859.5 À \\ Ζ = 2, Rgt(F) = 0.030, wÄreffF; = 0.049, T= 296 K. Source of material TbçSbsOs has been synthesized from terbium metal, antimony, and Sb203. Stoichiometric amounts of the starting materials were mixed and sealed in a tantalum ampoule. The following temperature profile was applied: 298 —• 1923 Κ (50 Kh, subsequent annealing for 12 h); 1923 -> 1673 Κ (20 KIT, subsequent annealing for 48 h); 1673 -> 298 Κ (20 KIT). Discussion Tb9Sb5C>5 crystallize in the LaçSbsOs type of structure [ 1,2], The atoms Tb2, Tb3 and Sbl, Sb2 are aranged in a corrugated double layer [TbSb], which can be regarded as a two-dimensional slab analogous to NaCl. Each [TbSb] fragment is sandwiched between two layers built from Tbl and Ol, 02. The NaCl-like double sheet is also a feature common to the structures of EutStaO [3] or Sc2Sb [4], In the latter compound the interlayer exclusively consists of Sc atoms. In the case of TbeSbsOs this layer is composed of Tb and O atoms with the composition TTmOs, and only 4/5 of the possible metal positions are occupied by terbium. Therefore, the structure can be regarded as a defect variant of Sc2Sb, stuffed with oxygen: TbçDSbsOs = ScioSbsDsFrom the originally square Ses pyramids, with their tips alternating up and down along the [001] direction, 4/5 transform into tetrahedra and 1/5 remain unchanged. All tetrahedral and square-pyramidal holes are filled with O atoms. The partial structure (TbçSbs) also corresponds to the inverted HfsSte type of structure [5]. The buckling of the NaCl-like slabs is one way to fit the dimensions of their meshes to the sandwiched sheets inbetween [6]. Here in Tb9SbsOs, the present of vacancies in the Tb4DOs sublattice, allows an additional adjustment, which is needed because of d(Tb—Sb) = 3.143 Â < 2 ¿(Tb—O) = 3.325 Â. Table 1. Data collection and handling. Crystal: dark silver block, size 0.01 χ 0.02 χ 0.02 mm Wavelength: Mo Ka radiation (0.71073 Â) μ· 441.78 cm\" Diffractometer, scan mode: SMART APEX Π, Broker AXS, ω 2θααχ· 74.4° N(hki)matsuaá, W^Ainique: 16398,2211 Criterion for /obs, N(hkl) /obs > 2 a(Iobs), 1615 N(param)nfiaat 47 Programs: SHELXS-97 [7], SHELXL-97 [8], ATOMS [9] 0@Tb 0@Tb * Correspondence author (e-mail: M.Jansen@fkf.mpg.de)
5 citations