Effects of high magnetic fields on the pseudogap and d-wave superconductivity in the underdoped and overdoped high-Tc superconductors

Guo Qing Zheng; H. Ozaki; W. G. Clark; M. Sakai; Y. Kitaoka; Y. Kodama; T. Kondo; Y. Shimakawa; Y. Kubo; P. Kuhns; A. P. Reyes; W. G. Moulton

doi:10.1016/S0921-4534(00)00703-6

Effects of high magnetic fields on the pseudogap and d-wave superconductivity in the underdoped and overdoped high-T_c superconductors

Guo Qing Zheng, H. Ozaki, W. G. Clark, M. Sakai, Y. Kitaoka, Y. Kodama, T. Kondo, Y. Shimakawa, Y. Kubo, P. Kuhns, A. P. Reyes, W. G. Moulton

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

2 Citations (Scopus)

Abstract

Based on measurements of the ⁶³Cu Knight shift and the nuclear spin-lattice relaxation rate under magnetic fields up to 28 T, we find that the pseudogap in the slightly overdoped TlSr₂CaCu₂O_6.88 (T_c=68 K) is due to Cooper pair density fluctuations. Such fluctuations are also found in the underdoped YBa₂Cu₄O₈ (T_c=74 K), but are small and only survive up to T_sf ≃ T_c+15K=90 K, which is much lower than the field-independent pseudogap temperature T* ≃ 160 K. The implication on the phase diagram is discussed. At low temperatures in the superconducting state, a field-induced finite density of states was found in both compounds and is interpreted as due to the quasiparticles outside a vortex core in a d-wave superconductor.

Original language	English
Pages (from-to)	819-822
Number of pages	4
Journal	Physica C: Superconductivity and its applications
Volume	341-348
Issue number	PART 3
DOIs	https://doi.org/10.1016/S0921-4534(00)00703-6
Publication status	Published - 2000

ASJC Scopus subject areas

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

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Zheng, G. Q., Ozaki, H., Clark, W. G., Sakai, M., Kitaoka, Y., Kodama, Y., Kondo, T., Shimakawa, Y., Kubo, Y., Kuhns, P., Reyes, A. P., & Moulton, W. G. (2000). Effects of high magnetic fields on the pseudogap and d-wave superconductivity in the underdoped and overdoped high-T_c superconductors. Physica C: Superconductivity and its applications, 341-348(PART 3), 819-822. https://doi.org/10.1016/S0921-4534(00)00703-6

Effects of high magnetic fields on the pseudogap and d-wave superconductivity in the underdoped and overdoped high-T_c superconductors. / Zheng, Guo Qing; Ozaki, H.; Clark, W. G.; Sakai, M.; Kitaoka, Y.; Kodama, Y.; Kondo, T.; Shimakawa, Y.; Kubo, Y.; Kuhns, P.; Reyes, A. P.; Moulton, W. G.

In: Physica C: Superconductivity and its applications, Vol. 341-348, No. PART 3, 2000, p. 819-822.

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

Zheng, GQ, Ozaki, H, Clark, WG, Sakai, M, Kitaoka, Y, Kodama, Y, Kondo, T, Shimakawa, Y, Kubo, Y, Kuhns, P, Reyes, AP & Moulton, WG 2000, 'Effects of high magnetic fields on the pseudogap and d-wave superconductivity in the underdoped and overdoped high-T_c superconductors', Physica C: Superconductivity and its applications, vol. 341-348, no. PART 3, pp. 819-822. https://doi.org/10.1016/S0921-4534(00)00703-6

Zheng, Guo Qing ; Ozaki, H. ; Clark, W. G. ; Sakai, M. ; Kitaoka, Y. ; Kodama, Y. ; Kondo, T. ; Shimakawa, Y. ; Kubo, Y. ; Kuhns, P. ; Reyes, A. P. ; Moulton, W. G. / Effects of high magnetic fields on the pseudogap and d-wave superconductivity in the underdoped and overdoped high-T_c superconductors. In: Physica C: Superconductivity and its applications. 2000 ; Vol. 341-348, No. PART 3. pp. 819-822.

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title = "Effects of high magnetic fields on the pseudogap and d-wave superconductivity in the underdoped and overdoped high-Tc superconductors",

abstract = "Based on measurements of the 63Cu Knight shift and the nuclear spin-lattice relaxation rate under magnetic fields up to 28 T, we find that the pseudogap in the slightly overdoped TlSr2CaCu2O6.88 (Tc=68 K) is due to Cooper pair density fluctuations. Such fluctuations are also found in the underdoped YBa2Cu4O8 (Tc=74 K), but are small and only survive up to Tsf ≃ Tc+15K=90 K, which is much lower than the field-independent pseudogap temperature T* ≃ 160 K. The implication on the phase diagram is discussed. At low temperatures in the superconducting state, a field-induced finite density of states was found in both compounds and is interpreted as due to the quasiparticles outside a vortex core in a d-wave superconductor.",

author = "Zheng, {Guo Qing} and H. Ozaki and Clark, {W. G.} and M. Sakai and Y. Kitaoka and Y. Kodama and T. Kondo and Y. Shimakawa and Y. Kubo and P. Kuhns and Reyes, {A. P.} and Moulton, {W. G.}",

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T1 - Effects of high magnetic fields on the pseudogap and d-wave superconductivity in the underdoped and overdoped high-Tc superconductors

AU - Zheng, Guo Qing

AU - Ozaki, H.

AU - Clark, W. G.

AU - Sakai, M.

AU - Kitaoka, Y.

AU - Kodama, Y.

AU - Kondo, T.

AU - Shimakawa, Y.

AU - Kubo, Y.

AU - Kuhns, P.

AU - Reyes, A. P.

AU - Moulton, W. G.

PY - 2000

Y1 - 2000

N2 - Based on measurements of the 63Cu Knight shift and the nuclear spin-lattice relaxation rate under magnetic fields up to 28 T, we find that the pseudogap in the slightly overdoped TlSr2CaCu2O6.88 (Tc=68 K) is due to Cooper pair density fluctuations. Such fluctuations are also found in the underdoped YBa2Cu4O8 (Tc=74 K), but are small and only survive up to Tsf ≃ Tc+15K=90 K, which is much lower than the field-independent pseudogap temperature T* ≃ 160 K. The implication on the phase diagram is discussed. At low temperatures in the superconducting state, a field-induced finite density of states was found in both compounds and is interpreted as due to the quasiparticles outside a vortex core in a d-wave superconductor.

AB - Based on measurements of the 63Cu Knight shift and the nuclear spin-lattice relaxation rate under magnetic fields up to 28 T, we find that the pseudogap in the slightly overdoped TlSr2CaCu2O6.88 (Tc=68 K) is due to Cooper pair density fluctuations. Such fluctuations are also found in the underdoped YBa2Cu4O8 (Tc=74 K), but are small and only survive up to Tsf ≃ Tc+15K=90 K, which is much lower than the field-independent pseudogap temperature T* ≃ 160 K. The implication on the phase diagram is discussed. At low temperatures in the superconducting state, a field-induced finite density of states was found in both compounds and is interpreted as due to the quasiparticles outside a vortex core in a d-wave superconductor.

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