Ultraslow fluctuations in the pseudogap states of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>HgBa</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi>CaCu</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mrow><mml:mn>6</mml:mn><mml:mo>+</mml:mo><mml:mi>δ</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math>

“…The doping dependent B term in Table 2 indicates the development of the covalency with the hole concentration in Hg1212. [3]. The notations conform to those in [3].…”

Section: Cu Hyperfine Coupling Constant Ratiosmentioning

confidence: 99%

“…Knowledge of the hyperfine coupling constants helps us to clarify the nature of the local field fluctuations in NMR measurements [6]. In this paper, we report the estimation of the 63 Cu hyperfine coupling constants in the double-CuO 2 -layer high-T c superconductors Hg1212 from the anisotropies in 63 Cu nuclear spin-lattice relaxation rates and spin Knight shifts [7], and discuss the nature of the ultraslow fluctuations [3].…”

Section: Introductionmentioning

confidence: 99%

Cu hyperfine coupling constants of HgBa₂CaCu₂O_6+δ

Itoh

Machi

Yamamoto

2018

J. Phys.: Conf. Ser.

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We estimated the ratios of 63 Cu hyperfine coupling constants in the double-layer high-Tc superconductor HgBa2CaCu2O 6+δ from the anisotropies in Cu nuclear spin-lattice relaxation rates and spin Knight shifts to study the nature of the ultraslow fluctuations causing the T2 anomaly in the Cu nuclear spin-echo decay. The ultraslow fluctuations may come from uniform magnetic fluctuations spread around the wave vector q = 0, otherwise the electric origins.

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“…The signatures of appearence of IUC magnetism at T * through a second-order transition have been reported in several experiments. [103][104][105][106] In addition, we have fitted our results for the temperature dependence of the the MELC order parameter in the case of a second order transition with a function = A(T 0 − T ) ν , where A and ν are fitting parameters. We obtain ν ≈ 0.5, a value which is close to the mean-field critical exponent in Ising like transition.…”

Section: Relevance To Experimentsmentioning

confidence: 99%

Incipient loop-current order in the underdoped cuprate superconductors

2019

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There are growing experimental evidence which indicate discrete symmetry breaking like parity, time-reversal and C4 lattice rotation in the pseudo-gap state of the under-doped copper-oxide based (cuprate) superconductors. The discrete symmetry breaking manifests a true phase transition to an ordered state. A detailed thermodynamic understanding of these orders can answer various puzzles related to the nature of the transition at the pseudogap temperature T * . In this work, we investigate thermodynamic signature of parity and time-reversal symmetry breaking within a theory of two kinds of instabilities in particle-particle (p-p) and particle-hole (p-h) channels in the pseudo-gap state. The p-p and p-h instabilities correspond to superconductivity (SC) and bond-excitonic (BDW) orders respectively. The BDW can generate both modulating charge and current densities. This scenario leads to an intricate competition between the ubiquitous charge density wave and SC, which is prominent in various cuprates in the under-doped regime. We show that a mean-field ground state of coexisting BDW and SC can spontaneously break the parity and time-reversal symmetry below superconducting critical temperature, provided the BDW itself breaks the time-reversal and parity. We describe that an auxiliary order parameter, referred as magneto-electric loop current (MELC) order, can be constructed from a composite of BDW and SC fields. We demonstrate that the MELC order spontaneously breaks parity and time-reversal symmetry and emerges due to a preemptive phase transition at a higher temperature before the primary orders set in.

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Ultraslow fluctuations in the pseudogap states ofHgBa2CaCu2O6+δ

Cited by 9 publications

References 43 publications

Discovery of slow magnetic fluctuations and critical slowing down in the pseudogap phase of YBa ₂ Cu ₃ O _y

Discovery of slow magnetic fluctuations and critical slowing down in the pseudogap phase of YBa ₂ Cu ₃ O _y

Cu hyperfine coupling constants of HgBa₂CaCu₂O_6+δ

Incipient loop-current order in the underdoped cuprate superconductors

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Ultraslow fluctuations in the pseudogap states ofHgBa2CaCu2O6+δ

Cited by 9 publications

References 43 publications

Discovery of slow magnetic fluctuations and critical slowing down in the pseudogap phase of YBa 2 Cu 3 O y

Discovery of slow magnetic fluctuations and critical slowing down in the pseudogap phase of YBa 2 Cu 3 O y

Cu hyperfine coupling constants of HgBa2CaCu2O6+δ

Incipient loop-current order in the underdoped cuprate superconductors

Contact Info

Product

Resources

About

Discovery of slow magnetic fluctuations and critical slowing down in the pseudogap phase of YBa ₂ Cu ₃ O _y

Discovery of slow magnetic fluctuations and critical slowing down in the pseudogap phase of YBa ₂ Cu ₃ O _y

Cu hyperfine coupling constants of HgBa₂CaCu₂O_6+δ