Pairing, pseudogap and Fermi arcs in cuprates

Kaminski, Adam; Kondo, Takeshi; Takeuchi, Tsunehiro; Gu, Genda

doi:10.1080/14786435.2014.906758

Cited by 42 publications

(41 citation statements)

References 48 publications

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“…At lower T , the transport in La 1.85 Sr 0.15 Cu 1−y Ni y O 4 has a coherent description in the framework of Fermi-liquid theory, where Kohler's rule is derived under single-relaxation-time approximation with the assumption of small τ -anisotropy over Fermi surface [63,64]. Fulfillment of the rule when ρ 0 is changed by changing temperature indicates nearly T -independent frequency distribution of the phonons involved [65] and is consistent with Fermi-arc length in cuprates being constant [66,67] rather than decreasing with decreasing temperature [68]. Ni doping can restore antiferromagnetic fluctuations [30,69] that give additional T -dependence in nearly-antiferromagnetic-metals magnetoresistance via correlation length ξ AF (T ), OMR∝ξ 4 AF (T )ρ −2 0 (Ref.…”

Section: (B-d)mentioning

confidence: 90%

Saturation of resistivity and Kohler's rule in Ni-dopedLa1.85Sr0.15CuO4cuprate

2017

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We present the results of electrical transport measurements of La1.85Sr0.15Cu1−yNiyO4 thin singlecrystal films at magnetic fields up to 9 T. Adding Ni impurity with strong Coulomb scattering potential to slightly underdoped cuprate makes the signs of resistivity saturation at ρsat visible in the measurement temperature window up to 350 K. Employing the parallel-resistor formalism reveals that ρsat is consistent with classical Ioffe-Regel-Mott limit and changes with carrier concentration n as ρsat ∝ 1/ √ n. Thermopower measurements show that Ni tends to localize mobile carriers, decreasing their effective concentration as n ∼ = 0.15 − y. The classical unmodified Kohler's rule is fulfilled for magnetoresistance in the nonsuperconducting part of the phase diagram when applied to the ideal branch in the parallel-resistor model.

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Section: (B-d)mentioning

confidence: 90%

Saturation of resistivity and Kohler's rule in Ni-dopedLa1.85Sr0.15CuO4cuprate

2017

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“…For example, previous ARPES measurements showed clear evidence that the antinodal gap enhances with temperature at optimally doped Bi 2 Sr 2 CuO 6+δ (Bi-2201) [47,48] and La 2−x Sr x CuO 4 (La-214) [49]. A recent study on Bi-2201 further reported that the anomalous temperature dependence of the measured gap, from slight underdoping to slight overdoping, extends to temperatures above T c (below T * ) [50]. In comparison, the gap remains nearly unchanged below T c in the deeply underdoped region where the pseudogap dominates, but follows the traditional BCS-like temperature dependence in the heavily overdoped region where the SC gap dominates.…”

Section: Introductionmentioning

confidence: 96%

Phase competition and anomalous thermal evolution in high-temperature superconductors

Zhou

Yin

et al. 2017

Phys. Rev. B

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The interplay of competing orders is relevant to high-temperature superconductivity known to emerge upon suppression of a parent antiferromagnetic order typically via charge doping. How such interplay evolves at low temperature-in particular at what doping level the zero-temperature quantum critical point (QCP) is located-is still elusive because it is masked by the superconducting state. The QCP had long been believed to follow a smooth extrapolation of the characteristic temperature T * for the strange normal state well above the superconducting transition temperature. However, recently the T * within the superconducting dome was reported to unexpectedly exhibit back-bending likely in the cuprate Bi2Sr2CaCu2O 8+δ . Here we show that the original and revised phase diagrams can be understood in terms of weak and moderate competitions, respectively, between superconductivity and a pseudogap state such as d-density-wave or spin-density-wave, based on both Ginzburg-Landau theory and the realistic t-t ′ -t ′′ -J-V model for the cuprates. We further found that the calculated temperature and doping-level dependence of the quasiparticle spectral gap and Raman response qualitatively agrees with the experiments. In particular, the T * back-bending can provide a simple explanation of the observed anomalous two-step thermal evolution dominated by the superconducting gap and the pseudogap, respectively. Our results imply that the revised phase diagram is likely to take place in high-temperature superconductors.

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“…One of the most controversial topics in the field of high-temperature superconductivity is the origin of the so-called pseudogap phenomenon observed by various experimental techniques in the underdoped cuprates [1][2][3] at temperatures T * being larger than the superconducting transition temperature T c . A large number of theoretical scenarios have been initially proposed to explain the origin of the pseudogap [4].…”

mentioning

confidence: 99%

“…To model the temperature dependence of the optical conductivity we perform additional calculations, assuming that the gap function follows an effective strong-coupling-like behavior as (T ) = 1 − (T /T CDW ) 3 . The result is shown in Fig.…”

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confidence: 99%

Polar Kerr effect from a time-reversal symmetry breaking unidirectional charge density wave

2015

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We analyze the Hall conductivity σ xy (ω) of a charge ordered state with momentum Q = (0,2Q) and calculate the intrinsic contribution to the Kerr angle K using the fully reconstructed tight-binding band structure for layered cuprates beyond the low energy hot spot model and particle-hole symmetry. We show that such a unidirectional charge density wave (CDW), which breaks time-reversal symmetry, as recently put forward by Wang and Chubukov [Phys. Rev. B 90, 035149 (2014)], leads to a nonzero polar Kerr effect, as observed experimentally. In addition, we model a fluctuating CDW via a large quasiparticle damping of the order of the CDW gap and discuss possible implications for the pseudogap phase. We can qualitatively reproduce previous measurements of underdoped cuprates, but making quantitative connections to experiments is hampered by the sensitivity of the polar Kerr effect with respect to the complex refractive index n(ω). Introduction. One of the most controversial topics in the field of high-temperature superconductivity is the origin of the so-called pseudogap phenomenon observed by various experimental techniques in the underdoped cuprates [1-3] at temperatures T * being larger than the superconducting transition temperature T c . A large number of theoretical scenarios have been initially proposed to explain the origin of the pseudogap [4]. Recent experimental studies of hole-doped cuprates, however, have indicated that the pseudogap region of the high-T c cuprates is a state which competes with superconductivity, and also breaks several symmetries [5][6][7][8][9][10][11][12]. In particular, x-ray and neutron scattering experiments as well as scanning tunneling microscopy (STM) have found the breaking of the lattice symmetry from C 4 down to C 2 below the pseudogap temperature T * in several cuprate compounds [5][6][7]10]. In addition, recent findings of the polar Kerr effect [9,[11][12][13], and the intraunit cell magnetic order [14] point towards breaking of time-reversal or mirror symmetries in the underdoped cuprates. Furthermore, direct indications in favor of the static incommensurate charge-density-wave (CDW) order with momenta Q x = (2Q,0) and/or Q y = (0,2Q) were found by x-ray measurements [15][16][17][18], the nuclear magnetic resonance technique [19][20][21], and in experiments on the sound velocity in a magnetic field [22]. In addition, quantum oscillation measurements indicate a reconstructed band structure with small Fermi surfaces [23][24][25][26]. In these systems 2Q refers to the distance between the so-called hot spots on the Fermi surface, i.e., points where the magnetic Brillouin zones intersect the Fermi surface (FS). It was also argued that the charge order has a predominantly d-wave form factor [10] and that the formation of Fermi surface arcs coincides with the formation of CDW order [27].Possible explanations of the charge order and other related symmetry breaking include loop-current order [28] or ddensity-wave (current) order [29]. Within the so-called spin fluctuation scenario...

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Pairing, pseudogap and Fermi arcs in cuprates

Cited by 42 publications

References 48 publications

Saturation of resistivity and Kohler's rule in Ni-dopedLa1.85Sr0.15CuO4cuprate

Saturation of resistivity and Kohler's rule in Ni-dopedLa1.85Sr0.15CuO4cuprate

Phase competition and anomalous thermal evolution in high-temperature superconductors

Polar Kerr effect from a time-reversal symmetry breaking unidirectional charge density wave

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