Double pair breaking peak in Raman scattering spectra of the triple-layer cuprate Bi2Sr2Ca2Cu3O10+z

G. Vincini; K. Tanaka; T. Adachi; L. Sobirey; S. Miyasaka; S. Tajima; S. Adachi; N. Sasaki; T. Watanabe

doi:10.1103/PhysRevB.98.144503

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Double pair breaking peak in Raman scattering spectra of the triple-layer cuprate Bi2Sr2Ca2Cu3O10+z

G. Vincini, K. Tanaka, T. Adachi, L. Sobirey, S. Miyasaka, S. Tajima, S. Adachi, N. Sasaki, T. Watanabe

DOI 10.1103/PhysRevB.98.144503 · Physical Review B

T1

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Abstract

We report the Raman scattering measurements on the triple-layer Bi2Sr2Ca2Cu3O10+z (Bi2223) crystals of four different doping levels from slightly overdoped to strongly underdoped regimes. We observed a double pair breaking peak in the antinodal B1g configuration that we attribute to the two antinodal gaps opening on the outer and inner CuO2 plane (OP and IP) band, respectively. The doping dependence of the pair breaking peak energy was investigated. Considering the difference in doping level between the IP and OP, all the B1g pair breaking peak energies for OP and IP were found to align on a single line as a function of doping, which is consistent with the previous results on the double and monolayer cuprates. Within our experimental accuracy the IP and OP peaks start to appear almost at the same temperature. These findings suggest some sort of interaction between the layers. The observed gap energy is very large, not scaling with Tc.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Bi2Sr2Ca2Cu3O10+z Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	109	Pressure not reported	onset
Bi2Sr2Ca2Cu3O10+z Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	105	Pressure not reported	onset
Bi2Sr2Ca2Cu3O10+z Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	88	Pressure not reported	onset
Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
HgBa2Sr2Cu3Oz Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown