Crisis in electrical behavior of the TlInSe2 semiconducting compound

Karakotsou, Ch.; Anagnostopoulos, A. N.

doi:10.1016/0167-2789(95)00295-2

Cited by 16 publications

(5 citation statements)

References 16 publications

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“…Here we concentrate on the latter and in particular on an important subset of such mechanisms referred to as "crisis intermittency" [5,6], whereby attractors underlying the dynamics change suddenly as a system parameter is varied. There are both experimental and numerical evidence for such modes of behaviour (see for example [4,6,7,9] and references therein). As far as their detailed underlying mechanism and temporal signature are concerned, crises come in three varieties [6].…”

Section: Introductionmentioning

confidence: 99%

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Crisis-induced intermittency in truncated mean field dynamos

Covas

Tavakol

1997

Phys. Rev. E

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We investigate the detailed dynamics of a truncated αω dynamo model with a dynamic α effect. We find the presence of multiple attractors, including two chaotic attractors with a fractal basin boundary which merge to form a single attractor as the control parameter is increased. By considering phase portraits and the scaling of averaged times of transitions between the two attractors, we demonstrate that this merging is accompanied by a crisis-induced intermittency. We also find a range of parameter values over which the system has a fractal parameter dependence for fixed initial conditions. This is the first time this type of intermittency has been observed in a dynamo model and it could be of potential importance in accounting for some forms of intermittency in the solar and stellar output.

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Section: Introductionmentioning

confidence: 99%

“…There are both experimental and numerical evidence for such modes of behaviour (see for example [4,6,7,9] and references therein). As far as their detailed underlying mechanism and temporal signature are concerned, crises come in three varieties [6].…”

Section: Introductionmentioning

confidence: 99%

Crisis-induced intermittency in truncated mean field dynamos

Covas

Tavakol

1997

Phys. Rev. E

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“…The electronic structure of VB is calculated from Eqs. (3) and (4). It consists of two bandsthe intensive sp and less intensive s one.…”

Section: Discussionmentioning

confidence: 99%

“…Such chains form a tetragonal lattice of the space group D 18 4h (I4/mcm). The crystal exhibits many nonlinear effects, such as S-type characteristics with voltage oscillations, switching, and memory, which attract the interest for technological applications [3,4].…”

Section: Introductionmentioning

confidence: 99%

XPS and electronic structure of TlInSe₂crystals

Nelkinas¹

2007

Lithuanian J. Phys.

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The paper presents the X-ray photoelectron spectra (XPS) of the valence band (VB) and of the principal core levels (CL) from the (010) and (001) plane axes for the quasi-one-dimensional TlInSe2 single crystal. The XPS were measured with monochromatized Al Kα radiation in the energy range of 0-1400 eV at room and 393 K temperature. The VB is located 0.6-10 eV below the Fermi level. Experimental energies of the VB and CL are compared with the results of quantum mechanical ab initio calculations of the molecular model of the TlInSe2 crystal. The electronic structure of the VB and CL is described theoretically by quantum mechanical Hartree-Fock calculations. The surface and bulk atoms influence the shape of the VB and CL, which is crystallographic plane dependent. The chemical shifts in the TlInSe2 crystal for the Tl, In, and Se states are obtained.

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“…TlInSe 2 exhibits very interesting physical properties in the temperature range 140–430 K, for example, different nonlinear effects in the electrical behavior of crystals, such as S−type current – voltage characteristics with voltage oscillations in the negative resistance region, switching and memory effects . Recently it has been found that TlInSe 2 is characterized by giant values of the Seebeck coefficient at the temperature region of 320–430 K …”

Section: Introductionmentioning

confidence: 99%

Synthesis, Powder X‐Ray Diffraction, and Ab Initio Study of TlInSe₂: Analysis of Its Thermoelectric Properties

Chumakov¹,

Mintaş²,

Amiraslanov

et al. 2019

Physica Status Solidi (a)

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In this paper, the authors report first‐principles calculations of the Seebeck coefficient in TlInSe2. Experimental measurements demonstrate that TlInSe2 is characterized by giant values of the Seebeck coefficient at the temperature region of 320–430 K. To get insight on significant enhancement of Seebeck coefficient under temperature changing the density functional theory (DFT) and the Boltzmann transport equation are applied to calculate the semiclassical transport coefficients for TlInSe2 and its constructed models. The molecular dynamic simulations of 2 × 2 × 2 and 1 × 1 × 8 superlattices of TlInSe2, the TlInSe2_118a, TlInSe2_118b, TlInSe2_222a, TlInSe2_222b structures are performed to study their behavior in both “bulk” and “chain – like” modes. It is found that the distortions of InSe4 tetrahedra and displacements of Tl atom lead to formation of Tl–Se covalent bonds. The “bulk” TlInSe2_222b compound possesses the maximum value of Seebeck coefficient and (ZT)max in comparison with another studied compounds. The hybridization of Se and Tl orbitals near the top of valence band and hybridization of the Se, Tl, and In orbitals in conduction band may lead to increasing of Seebeck coefficient in TlInSe2 at 425 K.

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Crisis in electrical behavior of the TlInSe2 semiconducting compound

Cited by 16 publications

References 16 publications

Crisis-induced intermittency in truncated mean field dynamos

Crisis-induced intermittency in truncated mean field dynamos

XPS and electronic structure of TlInSe₂crystals

Synthesis, Powder X‐Ray Diffraction, and Ab Initio Study of TlInSe₂: Analysis of Its Thermoelectric Properties

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Crisis in electrical behavior of the TlInSe2 semiconducting compound

Cited by 16 publications

References 16 publications

Crisis-induced intermittency in truncated mean field dynamos

Crisis-induced intermittency in truncated mean field dynamos

XPS and electronic structure of TlInSe2crystals

Synthesis, Powder X‐Ray Diffraction, and Ab Initio Study of TlInSe2: Analysis of Its Thermoelectric Properties

Contact Info

Product

Resources

About

XPS and electronic structure of TlInSe₂crystals

Synthesis, Powder X‐Ray Diffraction, and Ab Initio Study of TlInSe₂: Analysis of Its Thermoelectric Properties