Impurity and magnetic field effects on the stripes in cuprates

Koike, Yasuhiro; Adachi, Tadashi

doi:10.1016/j.physc.2012.04.001

Cited by 13 publications

(11 citation statements)

References 113 publications

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“…With further doping, T c turns into a decrease in the overdoped regime, and finally, the superconductivity disappears in the heavily-overdoped regime where the system becomes a metal. Comprehensive neutron scattering [4] and muon spin relaxation (µSR) [5][6][7][8][9] experiments have uncovered AF fluctuations in the SC doping regime, suggesting that AF fluctuations are a glue to form SC elec- * Corresponding author: t-adachi@sophia.ac.jp tron pairs. In the non-SC heavily-overdoped regime, recent theories [10][11][12] and experiments [13,14] have suggested the existence of ferromagnetic fluctuations of itinerant carriers.…”

Section: Introductionmentioning

confidence: 99%

“…With further doping, T c turns into a decrease in the overdoped regime, and finally, the superconductivity disappears in the heavily-overdoped regime where the system becomes a metal. Comprehensive neutron scattering [4] and muon spin relaxation (µSR) [5][6][7][8][9] experiments have uncovered AF fluctuations in the SC doping regime, suggesting that AF fluctuations are a glue to form SC elec-Electron-doped high-T c cuprates were first discovered by Tokura et al in 1989 [15]. Pronounced features different from those in the hole-doped cuprates are not only the electron carrier, but also the reduction annealing, which is absolutely essential to obtain the superconductivity in the electron-doped cuprates.…”

Section: Introductionmentioning

confidence: 99%

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Novel Electronic State and Superconductivity in the Electron-Doped High-Tc T’-Superconductors

Adachi

Koike

2017

Condensed Matter

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Abstract:In this review article, we show our recent results relating to the undoped (Ce-free) superconductivity in the electron-doped high-T c cuprates with the so-called T' structure. For an introduction, we briefly mention the characteristics of the electron-doped T'-cuprates, including the reduction annealing, conventional phase diagram and undoped superconductivity. Then, our transport and magnetic results and results relating to the superconducting pairing symmetry of the undoped and underdoped T'-cuprates are shown. Collaborating spectroscopic and nuclear magnetic resonance results are also shown briefly. It has been found that, through the reduction annealing, a strongly localized state of carriers accompanied by an antiferromagnetic pseudogap in the as-grown samples changes to a metallic and superconducting state with a short-range magnetic order in the reduced superconducting samples. The formation of the short-range magnetic order due to a very small amount of excess oxygen in the reduced superconducting samples suggests that the T'-cuprates exhibiting the undoped superconductivity in the parent compounds are regarded as strongly correlated electron systems, as well as the hole-doped high-T c cuprates. We show our proposed electronic structure model to understand the undoped superconductivity. Finally, unsolved future issues of the T'-cuprates are discussed.

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Section: Introductionmentioning

confidence: 99%

“…With further doping, T c turns into a decrease in the overdoped regime, and finally, the superconductivity disappears in the heavily-overdoped regime where the system becomes a metal. Comprehensive neutron scattering [4] and muon spin relaxation (µSR) [5][6][7][8][9] experiments have uncovered AF fluctuations in the SC doping regime, suggesting that AF fluctuations are a glue to form SC elec-Electron-doped high-T c cuprates were first discovered by Tokura et al in 1989 [15]. Pronounced features different from those in the hole-doped cuprates are not only the electron carrier, but also the reduction annealing, which is absolutely essential to obtain the superconductivity in the electron-doped cuprates.…”

Section: Introductionmentioning

confidence: 99%

Novel Electronic State and Superconductivity in the Electron-Doped High-Tc T’-Superconductors

Adachi

Koike

2017

Condensed Matter

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“…This observation led to the formulation of an unconventional pairing mechanism and symmetry of the order parameter for cuprate HTSs. In addition, in several cases a ground state with static antiferromagnetic (AF) correlations is stabilized by Zndoping [33][34][35][36][37][38]. Up to now much less is known concerning impurity effects on the static stripe phase in cuprates at 1/8 doping.…”

mentioning

confidence: 99%

“…In addition, in several cases a ground state with static antiferromagnetic (AF) correlations is stabilized by Zndoping [33][34][35][36][37][38]. Up to now much less is known concerning impurity effects on the static stripe phase in cuprates at 1/8 doping.…”

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confidence: 99%

Complementary Response of Static Spin-Stripe Order and Superconductivity to Nonmagnetic Impurities in Cuprates

et al. 2017

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We report muon-spin rotation and neutron-scattering experiments on non-magnetic Zn impurity effects on the static spin-stripe order and superconductivity of the La214 cuprates. Remarkably, it was found that, for samples with hole doping x ≈ 1/8, the spin-stripe ordering temperature Tso decreases linearly with Zn doping y and disappears at y ≈ 4%, demonstrating a high sensitivity of static spin-stripe order to impurities within a CuO2 plane. Moreover, Tso is suppressed by Zn in the same manner as is the superconducting transition temperature Tc for samples near optimal hole doping. This surprisingly similar sensitivity suggests that the spin-stripe order is dependent on intertwining with superconducting correlations.

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“…2. [16][17][18] The origin of the 1=8 anomaly attracted great interest in relation to the origin of the high-T c superconductivity, but it was not elucidated for a while. Thereat, μSR measurements by Watanabe et al 19) have succeeded in observing a clear muon-spin precession in LBCO with x ¼ 1=8, as shown in Fig.…”

Section: =8 Anomaly and Stripesmentioning

confidence: 99%

μSR Studies on Magnetism in High-T_c Cuprates

Koike

Adachi

2016

J. Phys. Soc. Jpn.

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Since the discovery of high-T c superconductivity in cuprates, muon spin relaxation (μSR) measurements have greatly contributed to the understanding of high-T c superconductivity. In this paper, μSR studies on the magnetism in high-T c cuprates obtained these past three decades are reviewed. Antiferromagnetic long-range order, 1=8 anomaly, stripes of Cu spins and holes, impurity-induced magnetism, magnetic-field-induced magnetism, pseudogap, ferromagnetism in the heavily overdoped regime, and undoped superconductivity in TA-type cuprates are discussed. Moreover, the fundamentals of μSR measurements for the study of magnetism are described for μSR beginners.

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Impurity and magnetic field effects on the stripes in cuprates

Cited by 13 publications

References 113 publications

Novel Electronic State and Superconductivity in the Electron-Doped High-Tc T’-Superconductors

Novel Electronic State and Superconductivity in the Electron-Doped High-Tc T’-Superconductors

Complementary Response of Static Spin-Stripe Order and Superconductivity to Nonmagnetic Impurities in Cuprates

μSR Studies on Magnetism in High-T_c Cuprates

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Impurity and magnetic field effects on the stripes in cuprates

Cited by 13 publications

References 113 publications

Novel Electronic State and Superconductivity in the Electron-Doped High-Tc T’-Superconductors

Novel Electronic State and Superconductivity in the Electron-Doped High-Tc T’-Superconductors

Complementary Response of Static Spin-Stripe Order and Superconductivity to Nonmagnetic Impurities in Cuprates

μSR Studies on Magnetism in High-Tc Cuprates

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μSR Studies on Magnetism in High-T_c Cuprates