Optical investigation of the Peierls gap in the chain-like conductor (TaSe4)2I

Geserich, H. P.; Scheiber, G.; Dorrler, M.; Lévy, F.; Monçeau, P.

doi:10.1016/0378-4363(86)90093-8

Cited by 26 publications

(14 citation statements)

References 5 publications

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“…Finally, we obtain V 0 = 0.7 × 380/4.7 ≈ 57 meV for the strength of the charge order parameter, which, on taking T 0 ≈ 135 K [23] for the ordering temperature, yields 2V 0 /k B T 0 ≈ 10. While this ratio is large, it lies within the range of values, 6 < 2V 0 /k B T 0 < 17, found experimentally in typical charge-density wave systems [44][45][46][47][48]. V 0 is also of sufficient strength to overcome incoherence of the bands reported at the anodes [52].…”

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confidence: 72%

Fermi surface reconstruction from bilayer charge ordering in the underdoped high temperature superconductor YBa₂Cu₃O_6+x

Harrison

Sebastian

2012

New J. Phys.

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We show that a Fermi surface in underdoped YBa 2 Cu 3 O 6+x yielding the distribution of quantum oscillation frequencies observed over a broad range of magnetic field can be reconciled with the wavevectors of charge modulations found in nuclear magnetic resonance and x-ray scattering experiments within a model of biaxial charge ordering occurring in a bilayer CuO 2 planar system. Bilayer coupling introduces the possibility of different period modulations and quantum oscillation frequencies corresponding to each of the bonding and antibonding bands, which can be reconciled with recent experimental observations.Our level of understanding of metals typically depends on the extent to which Fermi surface cross-sections observed in quantum oscillation experiments can be explained by comparison with band structure calculations, and the degree to which Fermi liquid behavior prevails [1][2][3][4]. Additional factors, such as a periodic modulation of the electronic states-caused, for example, by a spin-or charge-density wave-can introduce additional gaps, in which case the Fermi surface needs to be understood in terms of the original band structure translated by ordering wavevectors [4][5][6][7].

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confidence: 72%

Fermi surface reconstruction from bilayer charge ordering in the underdoped high temperature superconductor YBa₂Cu₃O_6+x

Harrison

Sebastian

2012

New J. Phys.

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“…At T CDW = 263 K it undergoes a charge density wave (CDW) transition, accompanied by an incommensurate structural distorsion [10,11]. As expected, the instability affects the electronic structure, and clear signatures of the transition are found in the electrical resistivity [12,13], the magnetic susceptibility [14] and the optical response [15]. The CDW phase is rather unusual.…”

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confidence: 92%

Electronic Instability in a Zero-Gap Semiconductor: The Charge-Density Wave in(TaSe4)2I

et al. 2013

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We report a comprehensive study of the paradigmatic quasi-1D compound (TaSe(4))(2)I performed by means of angle-resolved photoemission spectroscopy (ARPES) and first-principles electronic structure calculations. We find it to be a zero-gap semiconductor in the nondistorted structure, with non-negligible interchain coupling. Theory and experiment support a Peierls-like scenario for the charge-density wave formation below T(CDW)=263 K, where the incommensurability is a direct consequence of the finite interchain coupling. The formation of small polarons, strongly suggested by the ARPES data, explains the puzzling semiconductor-to-semiconductor transition observed in transport at T(CDW).

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“…2 But the PG is especially pronounced in cases where the bare gap is opened spontaneously as a symmetry-breaking effect which was the subject of detailed experimental studies. [3][4][5][6][7] In quasi-onedimensional ͑1D͒ conductors it is known as the Peierls-Fröhlich instability leading to the charge-density wave ͑CDW͒ formation, as well as to analogous spin Peierls and spin-density-wave states. 8 Here the picture of the PG has been suggested theoretically 9 in relation to absence of the long-range order ͑LRO͒ in 1D CDW's.…”

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Theory of subgap photoemission in one-dimensional electron-phonon systems: An instanton approach to pseudogaps

Matveenko

2002

Phys. Rev. B

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For a one-dimensional electron-phonon system we consider photon absorption involving electronic excitations within the pseudogap energy range. Within the adiabatic approximation for the electron-phonon interactions these processes are described by nonlinear configurations of an instanton type. The one-parameter ansatz for the extremal instanton trajectory allows one to span a wide spectral rang providing qualitatively correct limits. We calculate intensities of the photoemission spectroscopy ͑PES͒ including momentum-resolved or angle-resolved PES ͑ARPES͒, and supplement known results for the optical subgap absorption. We start with the generic case of a one-dimensional semiconductor with a pronounced polaronic effect. We consider in details the Peierls model for a half-filled band of electrons coupled to a lattice which describes the polyacethylene and some commensurate charge-density waves. Particular attention was required to study the momentum dependences for the ARPES, where we face an intriguing interference between the time evolution and the translational motion of the instantons.

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Optical investigation of the Peierls gap in the chain-like conductor (TaSe4)2I

Cited by 26 publications

References 5 publications

Fermi surface reconstruction from bilayer charge ordering in the underdoped high temperature superconductor YBa₂Cu₃O_6+x

Fermi surface reconstruction from bilayer charge ordering in the underdoped high temperature superconductor YBa₂Cu₃O_6+x

Electronic Instability in a Zero-Gap Semiconductor: The Charge-Density Wave in(TaSe4)2I

Theory of subgap photoemission in one-dimensional electron-phonon systems: An instanton approach to pseudogaps

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Optical investigation of the Peierls gap in the chain-like conductor (TaSe4)2I

Cited by 26 publications

References 5 publications

Fermi surface reconstruction from bilayer charge ordering in the underdoped high temperature superconductor YBa2Cu3O6+x

Fermi surface reconstruction from bilayer charge ordering in the underdoped high temperature superconductor YBa2Cu3O6+x

Electronic Instability in a Zero-Gap Semiconductor: The Charge-Density Wave in(TaSe4)2I

Theory of subgap photoemission in one-dimensional electron-phonon systems: An instanton approach to pseudogaps

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Fermi surface reconstruction from bilayer charge ordering in the underdoped high temperature superconductor YBa₂Cu₃O_6+x

Fermi surface reconstruction from bilayer charge ordering in the underdoped high temperature superconductor YBa₂Cu₃O_6+x