Shift of the Fermi level during cointercalation of copper and iron into TiSe2

Titov, A. N.; Титов, А. Ф.; Бушкова, О. В.; Tsurin, V. A.

doi:10.1134/s1063783410080032

Cited by 6 publications

(3 citation statements)

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“…From a number of studies on chemical bonding in various TM x TiZ 2 compounds it is already known that hybridization of 3d states of an intercalated TM atom and its nearest neighborhood is evidence of the covalent origin [10][11][12] of chemical bonding in the majority of intercalated materials. In brief, the covalence of chemical bonding in TM x TiZ 2 results in the compression of the lattice in the c direction shifting the tri-layers closer to each other along a normal line to a basal plane [13], decrease of the conductivity [10], formation of narrow and dispersionless bands in the vicinity of the Fermi level [14,15] and a shift of the Fermi level [16] relative to the energy position of the original TiSe 2 band. Suppression of the magnetic moments of intercalated TM atoms [17] is due to the variation of the localization degree of the TM 3d, Ti 3d electrons and the hybridization of these with the Z element's 4p states.…”

Section: Introductionmentioning

confidence: 99%

Resonant photoemission at the L₃absorption edge of Mn and Ti and the electronic structure of 1T-Mn_0.2TiSe₂

Yablonskikh

Shkvarin

Yarmoshenko

et al. 2012

J. Phys.: Condens. Matter

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Resonant valence band x-ray photoelectron spectra (ResPES) excited near the 2p(3/2) core level energies, 2p x-ray photoelectron spectra (XPS) and L(3,2) x-ray absorption spectra (XAS) of Ti and Mn in single crystals of 1T-Mn(0.2)TiSe(2) were studied for the first time. The ionic-covalent character of the bonds formed by the Mn atoms with the neighboring Se atoms in the octahedral coordination is established. From the XPS and XAS measurements compared with the results of atomic multiplet calculations of Ti and Mn L(3,2) XAS, it is found that the Ti atoms are in the ionic state of 4 + and the Mn atoms are in the state of 2 +. In ResPES of Mn(0.2)TiSe(2) excited near the Ti 2p(3/2) and Mn 2p(3/2) absorption edges the Ti 3d and Mn 3d bands at binding energies just below the Fermi level are observed. According to theoretical calculations of E(k) the Ti 3d states are localized in the vicinity of the Γ point and the Mn 3d states are localized along the direction K-Γ-M in the Brillouin zone of the crystal.

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Section: Introductionmentioning

confidence: 99%

Resonant photoemission at the L₃absorption edge of Mn and Ti and the electronic structure of 1T-Mn_0.2TiSe₂

Yablonskikh

Shkvarin

Yarmoshenko

et al. 2012

J. Phys.: Condens. Matter

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“…Since Ti in TiSe 2 is in state 4+, this doping level is equivalent to 16 mol % of univalent metal, for example, copper. It is shown in [4] that such doping level considerably shifts the Fermi level and stabilizes the homogeneous state. It seems likely that just this circumstance determines not only the variation in the location of the Fe/Fe x TiSe 2 boundary but also its shape.…”

Section: Resultsmentioning

confidence: 97%

Phase diagram and thermodynamic equilibrium in the Fe x TiSe2 system

et al. 2012

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Phase diagram has been refined by the quenching method; the phase composition has been mon itored by NGR spectroscopy. The experimental data agree well with theoretical predictions on the relation of the phase diagram with the character of a chemical bond. It has been shown that the system is essentially non quasi binary because of the selenium exchange between the precipitated iron and the matrix lattice.

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“…Since it is the states at the Fermi level that are predominantly responsible for the character of the chemical bond, the co-intercalation effect in TiCh 2 should be visible more clearly. Little is known about Cu x Fe y TiSe 2 , 13,14 although the crystal structure and thermodynamic stability in a wide temperature range were studied for this system. It has been shown that the subsystems of Fe and Cu are independent.…”

Section: Introductionmentioning

confidence: 99%

Electronic and crystal structure of bi-intercalated titanium diselenide Cu_xNi_yTiSe₂

et al. 2021

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Shift of the Fermi level during cointercalation of copper and iron into TiSe2

Cited by 6 publications

References 4 publications

Resonant photoemission at the L₃absorption edge of Mn and Ti and the electronic structure of 1T-Mn_0.2TiSe₂

Resonant photoemission at the L₃absorption edge of Mn and Ti and the electronic structure of 1T-Mn_0.2TiSe₂

Phase diagram and thermodynamic equilibrium in the Fe x TiSe2 system

Electronic and crystal structure of bi-intercalated titanium diselenide Cu_xNi_yTiSe₂

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Shift of the Fermi level during cointercalation of copper and iron into TiSe2

Cited by 6 publications

References 4 publications

Resonant photoemission at the L3absorption edge of Mn and Ti and the electronic structure of 1T-Mn0.2TiSe2

Resonant photoemission at the L3absorption edge of Mn and Ti and the electronic structure of 1T-Mn0.2TiSe2

Phase diagram and thermodynamic equilibrium in the Fe x TiSe2 system

Electronic and crystal structure of bi-intercalated titanium diselenide CuxNiyTiSe2

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Resonant photoemission at the L₃absorption edge of Mn and Ti and the electronic structure of 1T-Mn_0.2TiSe₂

Resonant photoemission at the L₃absorption edge of Mn and Ti and the electronic structure of 1T-Mn_0.2TiSe₂

Electronic and crystal structure of bi-intercalated titanium diselenide Cu_xNi_yTiSe₂