Hydrogen in HfTi2 alloy: a formation of the hydrogen-stabilized HfTi2Hx phase with the C15-type host lattice

A variety of standard specimens is needed in order to systematically investigate the instrumentation, specimen, data reduction and quantitation variables in electron energy-loss spectroscopy (EELS). Pure single element specimens (e.g. various forms of carbon) have received considerable attention to date but certain elements of interest cannot be prepared directly as thin films. Since studies of the first and second row elements in two- or multicomponent systems will be of considerable importance in microanalysis using EELS, there is a need for convenient standards containing these species. For many investigations a standard should contain the desired element, or elements, homogeneously dispersed through a suitable matrix and at an accurately known concentration. These conditions may be met by the technique of implantation.Silicon was chosen as the host lattice since its principal ionization energies, EL23 = 98 eV and Ek = 1843 eV, are well removed from the K-edges of most elements of major interest such as boron (Ek = 188 eV), carbon (Ek = 283 eV), nitrogen (Ek = 400 eV) and oxygen (Ek = 532 eV).

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A New Host Lattice Built of the Werner-Type Copper(I,II) Cyanide Complex Involving a Macrocyclic Ligand

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19980622 ◽

1998 ◽

Vol 63 (5) ◽

pp. 622-627 ◽

Cited By ~ 5

Author(s):

Hidetaka Yuge ◽

Takayoshi Soma ◽

Takeshi Ken Miyamoto

Keyword(s):

Macrocyclic Ligand ◽

Host Lattice ◽

Macrocyclic Complex ◽

Monoclinic Space Group ◽

Cyanide Complex ◽

New Host ◽

Space Group

Crystals of a new clathrate [CuII(hmtd)CuI(CN)3]·CH2Cl2 were afforded from a Me2CO-EtOH-CH2Cl2 solution of a macrocyclic complex CuII(hmtd)CuI(CN)3·2 H2O (hmtd = 5,7,7,12,14,14-hexamethyl- 1,4,8,11-tetraazacyclotetradeca- 4,11-diene). It crystallizes in the monoclinic space group P21/n, a = 7.936(5), b = 18.717(4), c = 17.783(6) Å, β = 98.55(4)°, Z = 4, R = 0.0558 for 1 870 reflections. Unprecedentedly, only one of the three nitrogen-ends of a CuI(CN)3 moiety is coordinated to the square-pyramidal Cu(II) center. The guest CH2Cl2 molecules are captured in the channel between the potlid-shaped [CuII(hmtd)CuI(CN)3] molecules.

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Electron Spin Decoherence by Nuclei

10.1093/oso/9780198807308.003.0007 ◽

2018 ◽

Author(s):

M. M. Glazov

Keyword(s):

Electron Spin ◽

Spin Dynamics ◽

Magnetic Moments ◽

Host Lattice ◽

Spin Model ◽

Relaxation Processes ◽

Nuclear Spins ◽

Model Calculations ◽

Spin Decoherence ◽

Quantum Mechanical Approach

The discussion of the electron spin decoherence and relaxation phenomena via the hyperfine interaction with host lattice spins is presented here. The spin relaxation processes processes limit the conservation time of spin states as well as the response time of the spin system to external perturbations. The central spin model, where the spin of charge carrier interacts with the bath of nuclear spins, is formulated. We also present different methods to calculate the spin dynamics within this model. Simple but physically transparent semiclassical treatment where the nuclear spins are considered as largely static classical magnetic moments is followed by more advanced quantum mechanical approach where the feedback of electron spin dynamics on the nuclei is taken into account. The chapter concludes with an overview of experimental data and its comparison with model calculations.

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Ab Initio Prediction of the Redox Potentials of 3d Transition Metals Embedded in a Semiconducting Host Lattice

The Journal of Physical Chemistry C ◽

10.1021/acs.jpcc.0c11203 ◽

2021 ◽

Vol 125 (7) ◽

pp. 4267-4276

Author(s):

William Lafargue-Dit-Hauret ◽

Camille Latouche ◽

Stéphane Jobic

Keyword(s):

Transition Metals ◽

Ab Initio ◽

Host Lattice ◽

Redox Potentials ◽

Ab Initio Prediction

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The Urbach Rule for the Sodium- and Potassium-Halides

Zeitschrift für Naturforschung A ◽

10.1515/zna-1974-0117 ◽

1974 ◽

Vol 29 (1) ◽

pp. 145-157 ◽

Cited By ~ 9

Author(s):

Tetsuhiko Tomiki ◽

Takeo Miyata ◽

Hirokazu Tsukamoto

Keyword(s):

Temperature Dependence ◽

Acoustic Phonon ◽

Frequency Factor ◽

Host Lattice ◽

Exciton Peak ◽

Urbach Rule ◽

Temperature Dependences ◽

Hole Band ◽

Sodium And Potassium ◽

Potassium Halides

Phenomenological and physical aspects of the intrinsic tail spectra of the alkalihalides are studied referring to the new results on the intrinsic tail spectra of KBr and KI and to the temperature dependences of the lowest-energy Γ-exciton peak of the sodium- and potassium-halides. Systematically analysing the temperature dependence of the steepness parameter σs (T) of the Urbach rule for these halides, it is found that the frequency factor has the value nearly equal to the acoustic phonon energy at X or L of each host lattice and the steepness constant σs0 becomes larger in passing from fluoride to iodide. This halogen dependence of σs0 is discussed in terms of the hole band-mass of the Γ8-level.

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