Pressure-induced effects in high-Tc superconductors: Raman scattering as a probe of charge-lattice dynamics under high pressure

M. Osada; M. Kakihana; M. Käll; L. Börjesson

doi:10.1016/S0921-4534(01)00206-4

Pressure-induced effects in high-T_c superconductors: Raman scattering as a probe of charge-lattice dynamics under high pressure

M. Osada, M. Kakihana, M. Käll, L. Börjesson

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

The Raman spectra of Bi₂Sr₂CaCu₂O_8+d (Bi2212) and YBa₂Cu₄O₈ (Y124) have been investigated as a function of hydrostatic pressure. In both the overdoped Bi2212 and the underdoped Y124, the 140 cm^-1 Cu mode exhibits a pronounced nonlinear pressure dependence which correlates to the dependence of T_c versus pressure. We argue that this behavior is a signature of charge-redistribution effects induced by compression. For Bi2212, we also find that the mode-specific Grüneisen parameters scale inversely with the corresponding phonon frequencies, a behavior which is reminiscent of phonon pressure dependences in molecular solids.

Original language	English
Pages (from-to)	142-145
Number of pages	4
Journal	Physica C: Superconductivity and its applications
Volume	357-360
DOIs	https://doi.org/10.1016/S0921-4534(01)00206-4
Publication status	Published - 2001 Aug
Externally published	Yes

Keywords

BiSrCaCuO
High pressure
Raman scattering
YBa CuO

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

Access to Document

10.1016/S0921-4534(01)00206-4

Cite this

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title = "Pressure-induced effects in high-Tc superconductors: Raman scattering as a probe of charge-lattice dynamics under high pressure",

abstract = "The Raman spectra of Bi2Sr2CaCu2O8+d (Bi2212) and YBa2Cu4O8 (Y124) have been investigated as a function of hydrostatic pressure. In both the overdoped Bi2212 and the underdoped Y124, the 140 cm-1 Cu mode exhibits a pronounced nonlinear pressure dependence which correlates to the dependence of Tc versus pressure. We argue that this behavior is a signature of charge-redistribution effects induced by compression. For Bi2212, we also find that the mode-specific Gr{\"u}neisen parameters scale inversely with the corresponding phonon frequencies, a behavior which is reminiscent of phonon pressure dependences in molecular solids.",

keywords = "BiSrCaCuO, High pressure, Raman scattering, YBa CuO",

author = "M. Osada and M. Kakihana and M. K{\"a}ll and L. B{\"o}rjesson",

note = "Funding Information: M.O. is supported by Special Researcher's Basic Science Program at RIKEN. This work was financially supported in part by a Grant-in-Aid for Scientific Research from the Ministry of Education, Science, Sport and Culture of Japan. Copyright: Copyright 2018 Elsevier B.V., All rights reserved.",

year = "2001",

month = aug,

doi = "10.1016/S0921-4534(01)00206-4",

language = "English",

volume = "357-360",

pages = "142--145",

journal = "Physica C: Superconductivity and its Applications",

issn = "0921-4534",

publisher = "Elsevier",

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TY - JOUR

T1 - Pressure-induced effects in high-Tc superconductors

T2 - Raman scattering as a probe of charge-lattice dynamics under high pressure

AU - Osada, M.

AU - Kakihana, M.

AU - Käll, M.

AU - Börjesson, L.

N1 - Funding Information: M.O. is supported by Special Researcher's Basic Science Program at RIKEN. This work was financially supported in part by a Grant-in-Aid for Scientific Research from the Ministry of Education, Science, Sport and Culture of Japan. Copyright: Copyright 2018 Elsevier B.V., All rights reserved.

PY - 2001/8

Y1 - 2001/8

N2 - The Raman spectra of Bi2Sr2CaCu2O8+d (Bi2212) and YBa2Cu4O8 (Y124) have been investigated as a function of hydrostatic pressure. In both the overdoped Bi2212 and the underdoped Y124, the 140 cm-1 Cu mode exhibits a pronounced nonlinear pressure dependence which correlates to the dependence of Tc versus pressure. We argue that this behavior is a signature of charge-redistribution effects induced by compression. For Bi2212, we also find that the mode-specific Grüneisen parameters scale inversely with the corresponding phonon frequencies, a behavior which is reminiscent of phonon pressure dependences in molecular solids.

AB - The Raman spectra of Bi2Sr2CaCu2O8+d (Bi2212) and YBa2Cu4O8 (Y124) have been investigated as a function of hydrostatic pressure. In both the overdoped Bi2212 and the underdoped Y124, the 140 cm-1 Cu mode exhibits a pronounced nonlinear pressure dependence which correlates to the dependence of Tc versus pressure. We argue that this behavior is a signature of charge-redistribution effects induced by compression. For Bi2212, we also find that the mode-specific Grüneisen parameters scale inversely with the corresponding phonon frequencies, a behavior which is reminiscent of phonon pressure dependences in molecular solids.

KW - BiSrCaCuO

KW - High pressure

KW - Raman scattering

KW - YBa CuO

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JO - Physica C: Superconductivity and its Applications

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