Hierarchy of percolation thresholds and the mechanism for reduction of magnetic moments of transition metals intercalated into TiSe2

Титов, А. Ф.; Yarmoshenko, Yu. M.; Neumann, M.; Pleshchev, V. G.; Титова, С. Г.

doi:10.1134/1.1799187

Cited by 18 publications

(25 citation statements)

References 9 publications

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“…The compression of the lattice in the direction normal to the basal plane is typical for layered titanium dichalcogenides intercalated with transition metals [30,[43][44][45][46][47], but in all of these cases, the intercalated metal atoms occupy only the octahedral sites in the interlayer space. Therefore, there is no data about the intercalant concentration dependence of the lattice parameters in the case of the occupation of tetrahedral sites.…”

Section: Crystal Structurementioning

confidence: 99%

The crystal structure, chemical bonding, and magnetic properties of the intercalation compounds CrxZrTe2 (x = 0–0.3)

Shkvarin

Titov

Меренцов

et al. 2021

Materials Science and Engineering: B

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New intercalation compounds Cr x ZrTe 2 were synthesized in the Cr concentration range of x = 0 -0.3. A thorough study of the crystal and electronic structure has been performed. It was found that there is competition in the distribution of the Cr atoms over the octa-and tetrahedral sites in the van der Waals gap, depending on the Cr content. The ordering of the Cr atoms was found at x = 0.25; at the same time, the lattice symmetry decreases from trigonal P-3m1 to monoclinic F2/m. This ordering stabilizes the octahedral coordination of the Cr atoms by Te atoms. The analysis of the experimental data on the electronic structure and DOS calculations showed that the Cr 3d states are spin-split.

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Section: Crystal Structurementioning

confidence: 99%

The crystal structure, chemical bonding, and magnetic properties of the intercalation compounds CrxZrTe2 (x = 0–0.3)

Shkvarin

Titov

Меренцов

et al. 2021

Materials Science and Engineering: B

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“…Powder x-ray diffraction measurements show that the in-plane lattice constant, a, increases with x, while the interlayer lattice constant, c, decreases, as already reported. [12][13][14] This indicates that Fe intercalation acts on the host layers as a source of chemical uniaxial pressure along the c axis. The relative variation is proportional to x, ͉⌬a / a͉ϳ͉⌬c / c͉ϳ0.03x for x ഛ 0.25.…”

Section: Introductionmentioning

confidence: 98%

Direct evidence of band modification and suppression of superstructure inTiSe2upon Fe intercalation: An angle-resolved photoemission study

et al. 2006

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We present electrical resistivity ͑͒ measurements for the intercalation compound Fe x TiSe 2 ͑0 ഛ x Ͻ 0.16͒ over the temperature range from 4.2 to 300 K, and angle-resolved photoemission spectra for x = 0, 0.05, and 0.14 at 50 and 250 K ͑or 280 K͒. At 250 K, TiSe 2 is a semimetal having hole pockets centered at the ⌫ point and electron pockets around the L points of the Brillouin zone. Upon intercalation, Fe-derived flat bands appear just below the Fermi energy, and the Se 4p derived bands forming hole pockets at the ⌫ point are lowered. At 50 K, band folding due to 2a ϫ 2a ϫ 2c superlattice is observed clearly near the L point for the host and x = 0.05, while it vanishes for x = 0.14, consistent with the -T data. The critical concentration for the suppression of the superstructure ͑0.05Ͻ x c ഛ 0.075͒ can be explained reasonably well by the percolation threshold of a two-dimensional-trianglar lattice consisting of seven Ti atoms, which is estimated to 1 / 14 ͑=0.0714͒.

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“…The increase in the temperature independent contribution χ 0 can also be associated with the fact that the iron states or hybrid Fe3d/Ti3d states appear to be directly at the Fermi level, which can be caused by the dependence of the width of the bands of hybrid states on the iron concen tration. This dependence was discussed in [16], where it was shown that the attainment of percolation thresholds in the sublattice of covalent complexes and in the sublattice of the intercalant affects the width of the bands of the corresponding states. Moreover, it was assumed that each sublattice generates only one band.…”

Section: Magnetic Measurementsmentioning

confidence: 99%

“…The effective magnetic moment μ eff is almost independent of the iron concentration. This is rather strange if we consider the correlation observed for all the intercalation compounds of titanium dichalcogenides between the behavior of the lattice parameter c(x), which reflects the degree of hybridiza tion of the Ti3d states with the 3d states of the interca lated metal, and the effective magnetic moment μ eff [16]. The barely noticeable maximum of the effective magnetic moment μ eff near the iron concentration x 0 .1 coincides, however, with the maximum in the curve of the concentration dependence of the lattice parameter c(x), but this is the only coincidence.…”

Section: Magnetic Measurementsmentioning

confidence: 99%

Structure and properties of the intercalation compound Fe x TiTe2

et al. 2013

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Abstract-The Fe x TiTe 2 system, which belongs to the class of materials with the electronic spectrum con taining below the Fermi level the band of localized states with a strong temperature dependence of the band width, has been investigated experimentally. Heating of the material leads to a broadening of the band of localized states. When the top of this band crosses with the Fermi level, the effect of retrograde solubility is observed in the system; i.e., the metal precipitates to the composition ensuring the absence of increase in the Fermi energy during heating. The influence of the band of localized states on the structure of the material and its magnetic and electrical properties has been analyzed.

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Hierarchy of percolation thresholds and the mechanism for reduction of magnetic moments of transition metals intercalated into TiSe2

Cited by 18 publications

References 9 publications

The crystal structure, chemical bonding, and magnetic properties of the intercalation compounds CrxZrTe2 (x = 0–0.3)

The crystal structure, chemical bonding, and magnetic properties of the intercalation compounds CrxZrTe2 (x = 0–0.3)

Direct evidence of band modification and suppression of superstructure inTiSe2upon Fe intercalation: An angle-resolved photoemission study

Structure and properties of the intercalation compound Fe x TiTe2

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