Ultraslow fluctuations in the pseudogap states of HgBa2CaCu2 O6+δ

Yutaka Itoh; Takato Machi; Ayako Yamamoto

doi:10.1103/PhysRevB.95.094501

Ultraslow fluctuations in the pseudogap states of HgBa2CaCu2 O6+δ

Yutaka Itoh, Takato Machi, Ayako Yamamoto

Global course of Engineering and Science

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

7 Citations (Scopus)

Abstract

We report the transverse relaxation rates 1/T2's of the Cu63 nuclear spin-echo envelope for double-layer high-Tc cuprate superconductors HgBa2CaCu2O6+δ from underdoped to overdoped. The relaxation rate 1/T2L of the exponential function (Lorentzian component) shows a peak at 220-240 K in the underdoped (Tc=103 K) and the optimally doped (Tc=127 K) samples but no peak in the overdoped (Tc=93 K) sample. The enhancement in 1/T2L suggests a development of the zero frequency components of local field fluctuations. Ultraslow fluctuations are hidden in the pseudogap states.

Original language	English
Article number	094501
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	95
Issue number	9
DOIs	https://doi.org/10.1103/PhysRevB.95.094501
Publication status	Published - 2017 Mar 6

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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abstract = "We report the transverse relaxation rates 1/T2's of the Cu63 nuclear spin-echo envelope for double-layer high-Tc cuprate superconductors HgBa2CaCu2O6+δ from underdoped to overdoped. The relaxation rate 1/T2L of the exponential function (Lorentzian component) shows a peak at 220-240 K in the underdoped (Tc=103 K) and the optimally doped (Tc=127 K) samples but no peak in the overdoped (Tc=93 K) sample. The enhancement in 1/T2L suggests a development of the zero frequency components of local field fluctuations. Ultraslow fluctuations are hidden in the pseudogap states.",

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AB - We report the transverse relaxation rates 1/T2's of the Cu63 nuclear spin-echo envelope for double-layer high-Tc cuprate superconductors HgBa2CaCu2O6+δ from underdoped to overdoped. The relaxation rate 1/T2L of the exponential function (Lorentzian component) shows a peak at 220-240 K in the underdoped (Tc=103 K) and the optimally doped (Tc=127 K) samples but no peak in the overdoped (Tc=93 K) sample. The enhancement in 1/T2L suggests a development of the zero frequency components of local field fluctuations. Ultraslow fluctuations are hidden in the pseudogap states.

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Ultraslow fluctuations in the pseudogap states of HgBa2CaCu2 O6+δ

Abstract

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