Vibrational Raman Spectroscopy of High‐temperature Superconductors

Thomsen, C.; Kaczmarczyk, G.

doi:10.1002/0470027320.s6305

Cited by 17 publications

(19 citation statements)

References 122 publications

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“…Experimental probes assessing the EPC include inelastic neutron and x-ray scattering (INS and IXS, respectively) [18,19], Raman spectroscopy [20,21], and angleresolved photoemission spectroscopy (ARPES) [22,23]. Resonant inelastic x-ray scattering (RIXS) has emerged as a complementary technique that enables to directly quantify the momentum-dependent coupling strength between a given phonon mode and the photoexcited electron [24][25][26].…”

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confidence: 99%

Experimental Determination of Momentum-Resolved Electron-Phonon Coupling

et al. 2019

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We provide a novel experimental method to quantitatively estimate the electron-phonon coupling and its momentum dependence from resonant inelastic x-ray scattering (RIXS) spectra based on the detuning of the incident photon energy away from an absorption resonance. We apply it to the cuprate parent compound NdBa2Cu3O6 and find that the electronic coupling to the oxygen halfbreathing phonon mode is strongest at the Brillouin zone boundary, where it amounts to ∼ 0.17 eV, in agreement with previous studies. In principle, this method is applicable to any absorption resonance suitable for RIXS measurements and will help to define the contribution of lattice vibrations to the peculiar properties of quantum materials. arXiv:1902.09163v1 [cond-mat.supr-con]

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confidence: 99%

Experimental Determination of Momentum-Resolved Electron-Phonon Coupling

et al. 2019

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“…In Table 1, we observe that the 1 modes of T1-1223 involve motion of Ca, Ba, Cu(2), O(2), and O(3) atoms along the -axis [21][22][23][24][25]. Other Raman bands, whose origin is not clear, are shown in the Raman spectra; however, some of the bands at 293 and 449 cm −1 could be assigned Cu planes O(1,2) and O(2,3) [25] and the bands at 587 and 633 cm −1 could be a 1 O(4) motion (oxygen atom of TlO plane) [26].…”

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confidence: 99%

Monitoring of Spectral Map Changes from Normal State to Superconducting State in High-TCSuperconductor Films Using Raman Imaging

González‐Solís

Sánchez-Ruiz

Arana-Zamora

et al. 2015

Journal of Spectroscopy

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We have explored the chemical structure of TlBa2Ca2Cu3O9high-TCsuperconductor films with Tl-1223 phase to monitor spectral map changes from normal state to superconducting state using the technique of Raman imaging. Raman images were performed for 12 different temperatures in the 77–293 K range. At room temperature, the Raman images were characterized by a single color but as the temperature dropped a new color appeared and when the temperature of 77 K is reached and the superconducting state is assured, the Raman images were characterized by the red, green, and blue colors. Our study could suggest that the superconducting state emerged around 133 K, in full agreement with those reported in the literature. A cross-checking was done applying principal component analysis (PCA) to other sets of Raman spectra of our films measured at different temperatures. PCA result showed that the spectra can be grouped into two temperature ranges, one in the 293–153 K range and the other in the 133–77 K range suggesting that transition to the superconducting state occurred at some temperature around 133 K. This is the first report of preliminary results evaluating the usefulness of Raman imaging in determination of transition temperature of superconductor films.

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“…Dari teori group, secara teoritis modus vibrasi terkait dengan gerak atom pada posisi tertentu. Pada YBa 2 Cu 3 O 7 menghasilkan 36 modus vibrasi secara optik [2]. Gerakan oksigen di dalam molekul YBa 2 Cu 3 0 7 melibatkan gerakan oksigen seperti modus axial stretch dari O(1) teramati pada kisaran bilangan gelombang 500 (555) cm -…”

Section: Modus Vibrasi Yba 2 Cu 3 Ounclassified

Analysis of Superconductor of Nd1Ba2Cu3O7 and Nd3Ba5Cu8O18 Phases Using FTIR Spectrophotometer

Adnyana

Sumadiyasa

Wendri

2020

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I has been synthesized superconducting materials of the Nd1Ba2Cu3O7, Nd3Ba5Cu8O18 and Y3Ba5Cu8O18 phases. The study was conducted to determine whether the data from the phase Y1Ba2Cu3O7 can be used as a base to identify superconducting material of the Nd3Ba5Cu8O18 phase. Synthesis was done by solid state reaction method with initial mixing in HNO3 solution mixture with Y2O3, Nd2O3, BaCO3, and CuO, with the ratio adjusted to the stoichiometry calculation. Samples in the form of pellets with a diameter of 1.5 cm were sintered at 950 oC for 24 hours in an atmospheric environment. The FTIR measurements have been carried out with a standard KBr. The theoretical calculation spectra and vibration mode data from YBa2Cu3O7-d can be used to identify Nd1Ba2Cu3O7, Nd3Ba5Cu8O18 dan Y3Ba5Cu8O18, with peak absorption in the range of wave numbers that are almost the same, namely 400-450 cm-1, which is the four oxygen atoms O(2,3) mode, 426-439 cm-1 is the in-phase mode of oxygen atom O(2,3), and the vibrational mode of peaks O(4) is observed at 488 cm-1.

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Vibrational Raman Spectroscopy of High‐temperature Superconductors

Abstract: The sections in this article are Introduction R aman Scattering Theoretical Approaches to Vibrations in High‐ T c Materials Vibrations in High‐ … Show more

Cited by 17 publications

References 122 publications

Experimental Determination of Momentum-Resolved Electron-Phonon Coupling

Experimental Determination of Momentum-Resolved Electron-Phonon Coupling

Monitoring of Spectral Map Changes from Normal State to Superconducting State in High-TCSuperconductor Films Using Raman Imaging

Analysis of Superconductor of Nd1Ba2Cu3O7 and Nd3Ba5Cu8O18 Phases Using FTIR Spectrophotometer

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