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Морозов, Николай Викторович; Krusin‐Elbaum, L.; Shibauchi, T.; Bulaevskiǐ, L. N.; Maley, M. P.; Latyshev, Yu. I.; Yamashita, Tsutomu

doi:10.1103/physrevlett.84.1784

Cited by 80 publications

(82 citation statements)

References 21 publications

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“…18) In close relation to these observations, an out-of-plane negative MR in the superconducting state has been observed for Bi-2212 19) by suppressing the Josephson current. Intrinsic tunneling spectroscopy has also revealed that the pseudogap is insensitive to magnetic fields while the superconducting gap is sensitive to it.…”

Section: Introductionsupporting

confidence: 66%

Doping Dependencies of Onset Temperatures for the Pseudogap and Superconductive Fluctuation in Bi₂Sr₂CaCu₂O_8+δ, Studied from Both In-Plane and Out-of-Plane Magnetoresistance Measurements

et al. 2014

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To investigate the relationship between the pseudogap and superconductivity, we measured both the in-plane (ρ ab ) and out-of-plane (ρ c ) resistivity for oxygen-controlled Bi 2 Sr 2 CaCu 2 O 8+δ single crystals subject to magnetic fields (parallel to the c axis) of up to 17.5 T. The onset temperature for the superconductive fluctuation, T sc f , is determined by the large positive in-plane magnetoresistance (MR) and negative out-of-plane MR observed near T c , whereas the pseudogap opening temperature T * is determined by the semiconductive upturn of the zero-field ρ c . T sc f was found to scale roughly as T c , with a decreasing temperature interval between them upon doping. On the other hand, T * starts out much higher than T sc f but decreases monotonically upon doping; finally, at a heavily overdoped state, it is not observed above T sc f . These results imply that the pseudogap is not a simple precursor of superconductivity, but that further study is needed to determine whether or not T * exists below T sc f in the heavily overdoped state.

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Section: Introductionsupporting

confidence: 66%

Doping Dependencies of Onset Temperatures for the Pseudogap and Superconductive Fluctuation in Bi₂Sr₂CaCu₂O_8+δ, Studied from Both In-Plane and Out-of-Plane Magnetoresistance Measurements

et al. 2014

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“…The superconducting coherence can survive up to a characteristic field H sc , above which the quasi-particle conductivity overcomes the vortex contribution (19)(20)(21). This often underestimates the upper critical field H c2 near T c in high-T c cuprates; it is notoriously difficult to obtain from transport owing to large thermal fluctuations.…”

Section: Resultsmentioning

confidence: 99%

Field-induced quantum critical route to a Fermi liquid in high-temperature superconductors

Shibauchi

Krusin‐Elbaum

Hasegawa

et al. 2008

Proc. Natl. Acad. Sci. U.S.A.

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In high-transition-temperature (Tc) superconductivity, charge doping is a natural tuning parameter that takes copper oxides from the antiferromagnet to the superconducting region. In the metallic state above T c, the standard Landau's Fermi-liquid theory of metals as typified by the temperature squared (T 2 ) dependence of resistivity appears to break down. Whether the origin of the non-Fermiliquid behavior is related to physics specific to the cuprates is a fundamental question still under debate. We uncover a transformation from the non-Fermi-liquid state to a standard Fermi-liquid state driven not by doping but by magnetic field in the overdoped high-T c superconductor Tl2Ba2CuO6؉x. From the c-axis resistivity measured up to 45 T, we show that the Fermi-liquid features appear above a sufficiently high field that decreases linearly with temperature and lands at a quantum critical point near the superconductivity's upper critical field-with the Fermi-liquid coefficient of the T 2 dependence showing a power-law diverging behavior on the approach to the critical point. This field-induced quantum criticality bears a striking resemblance to that in quasi-two-dimensional heavy-Fermion superconductors, suggesting a common underlying spin-related physics in these superconductors with strong electron correlations.quantum criticality ͉ strongly correlated electron materials ͉ superconductivity Q uantum criticality refers to a phase transition process between competing states of matter governed not by thermal but by quantum fluctuations demanded by Heisenberg's uncertainty principle (1). It has emerged at the front and center of the physics of strongly correlated electron systems known to host competing quantum orders, and is witnessed by a proliferation of reports on heavy Fermions (2-5), itinerant (quantum) magnets (6), and hightransition-temperature (high-T c ) superconductors (7), with quantum matter tuned (at times arguably) through a transition by pressure, magnetic field, or doping-arguably because one has to rely on long shadows cast by quantum criticality far above zero temperature (8), for, obviously, T ϭ 0 K cannot ever be attained.The often-invoked hallmark of quantum criticality is an unconventional behavior of resistivity. For resistivity contribution, the standard Fermi liquid (FL) theory of metals predicts a quadratic temperature dependence (T) ϭ (0) ϩ AT 2 at low temperatures. In high-T c cuprates, however, the baffling T-linear resistivity over a huge temperature range near optimal (hole) doping has been observed (9), flagging, in this sense, a nonFermi liquid (n-FL) behavior in the metallic state above T c . This has led to new theoretical concepts, some related [e.g., phenomenology of ''marginal Fermi liquid'' (10)] and some unrelated [e.g., ''strange metal'' state (11)] to quantum criticality. In most considerations of cuprates near quantum critical points (QCPs) the tuning parameter is charge doping (1, 10); and although there is some experimental support (7, 12) for a doping-driven QCP, it is still...

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“…A characteristic peak is observed at a higher field H sc . This peak arises from a competition between two parallel tunneling conduction channels [16]: of Cooper pairs (Josephson tunneling that decreases with increasing field) and quasiparticles (dominating at high fields). At H sc , the quasiparticle and the Josephson tunneling currents are comparable.…”

Section: Resultsmentioning

confidence: 99%

“…[9]). ∆ρ c (H) follows a power-law at high fields above H sc [9,16], and when taken at each temperature to the limit ∆ρ c → 0 it gives the value of the pseudogap closing field H pg (T ). Fig.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Phase diagram of cuprate superconductors at ultrahigh magnetic fields

Krusin‐Elbaum¹,

Shibauchi²,

Mielke³

2003

Braz. J. Phys.

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We have investigated the field-temperature (H − T ) diagram of the superconducting and pseudogapped states of Bi 2 Sr 2 CaCu 2 O 8+y over a wide range of hole doping (0.10 ≤ p ≤ 0.225). Using interlayer tunneling transport in magnetic fields up to 60 T to probe the density-of states (DOS) depletion at low excitation energies we mapped the pseudogap closing field H pg . We found that H pg and the pseudogap onset temperature T are related via a Zeeman relation gµBHpg ≈ kBT , irrespective of whether the magnetic field is applied along the c-axis or parallel to CuO 2 planes. In contrast to large anisotropy of the superconducting state, the field anisotropy of Hpg is due solely to the g-factor. Our findings indicate that the pseudogap is of singlet-spin origin, consistent with models based on doped Mott insulator.

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High-Field Quasiparticle Tunneling inBi2Sr2CaCu2

Cited by 80 publications

References 21 publications

Doping Dependencies of Onset Temperatures for the Pseudogap and Superconductive Fluctuation in Bi₂Sr₂CaCu₂O_8+δ, Studied from Both In-Plane and Out-of-Plane Magnetoresistance Measurements

Doping Dependencies of Onset Temperatures for the Pseudogap and Superconductive Fluctuation in Bi₂Sr₂CaCu₂O_8+δ, Studied from Both In-Plane and Out-of-Plane Magnetoresistance Measurements

Field-induced quantum critical route to a Fermi liquid in high-temperature superconductors

Phase diagram of cuprate superconductors at ultrahigh magnetic fields

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High-Field Quasiparticle Tunneling inBi2Sr2CaCu2

Cited by 80 publications

References 21 publications

Doping Dependencies of Onset Temperatures for the Pseudogap and Superconductive Fluctuation in Bi2Sr2CaCu2O8+δ, Studied from Both In-Plane and Out-of-Plane Magnetoresistance Measurements

Doping Dependencies of Onset Temperatures for the Pseudogap and Superconductive Fluctuation in Bi2Sr2CaCu2O8+δ, Studied from Both In-Plane and Out-of-Plane Magnetoresistance Measurements

Field-induced quantum critical route to a Fermi liquid in high-temperature superconductors

Phase diagram of cuprate superconductors at ultrahigh magnetic fields

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Product

Resources

About

Doping Dependencies of Onset Temperatures for the Pseudogap and Superconductive Fluctuation in Bi₂Sr₂CaCu₂O_8+δ, Studied from Both In-Plane and Out-of-Plane Magnetoresistance Measurements

Doping Dependencies of Onset Temperatures for the Pseudogap and Superconductive Fluctuation in Bi₂Sr₂CaCu₂O_8+δ, Studied from Both In-Plane and Out-of-Plane Magnetoresistance Measurements