Anisotropic microwave conductivity of cuprate superconductors in the presence of CuO chain-induced impurities

Wang, Zhi; Feng, Shiping

doi:10.1103/physrevb.80.174507

Cited by 9 publications

(2 citation statements)

References 24 publications

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“…It also gives a consistent description of the thermodynamic properties [136] observed from heat capacity measurements [162,163,[248][249][250][251]. In particular, it has been used to successfully describe a number of the SC-state properties in the presence of impurities [252], including the microwave conductivity [253], the scanning tunneling microscopic measurements of the coherent Bogoliubov quasiparticle dispersion, and the related extinction of Bogoliubov quasiparticle scattering interference at low temperatures [254]. Establishing these agreements between the calculated results obtained based on the kinetic-energy driven SC mechanism and the corresponding experimental data observed from a wide variety of measurement techniques are important to confirm the nature of the SC phase of cuprate superconductors to be the kinetic-energy driven d-wave SC-state.…”

Section: Conclusion and Discussionmentioning

confidence: 99%

Kinetic-energy-driven superconductivity in cuprate superconductors

Feng

Lan

Zhao

et al. 2015

Int. J. Mod. Phys. B

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Superconductivity in cuprate superconductors occurs upon charge-carrier doping Mott insulators, where a central question is what mechanism causes the loss of electrical resistance below the superconducting (SC) transition temperature? In this paper, we attempt to summarize the basic idea of the kinetic-energy-driven SC mechanism in the description of superconductivity in cuprate superconductors. The mechanism of the kinetic-energy-driven superconductivity is purely electronic without phonons, where the charge-carrier pairing interaction in the particle-particle channel arises directly from the kinetic energy by the exchange of spin excitations in the higher powers of the doping concentration. This kinetic-energy-driven d-wave SC-state is controlled by both the SC gap and quasiparticle coherence, which leads to that the maximal SC transition temperature occurs around the optimal doping, and then decreases in both the underdoped and overdoped regimes. In particular, the same charge-carrier interaction mediated by spin excitations that induces the SC-state in the particle-particle channel also generates the normal-state pseudogap state in the particle-hole channel. The normal-state pseudogap crossover temperature is much larger than the SC transition temperature in the underdoped and optimally doped regimes, and then monotonically decreases upon the increase of doping, eventually disappearing together with superconductivity at the end of the SC dome. This kinetic-energy-driven SC mechanism also indicates that the strong * Corresponding author. 1530009-1 Int. J. Mod. Phys. B 2015.29. Downloaded from www.worldscientific.com by UNIVERSITY OF CALIFORNIA @ SAN DIEGO on 08/24/15. For personal use only. S. Feng et al.electron correlation favors superconductivity, since the main ingredient is identified into a charge-carrier pairing mechanism not from the external degree of freedom such as the phonon but rather solely from the internal spin degree of freedom of the electron. The typical properties of cuprate superconductors discussed within the framework of the kinetic-energy-driven SC mechanism are also reviewed. 1530009-2 Int. J. Mod. Phys. B 2015.29. Downloaded from www.worldscientific.com by UNIVERSITY OF CALIFORNIA @ SAN DIEGO on 08/24/15. For personal use only. Kinetic-energy-driven superconductivity in cuprate superconductors Hole doping Temperature T N AF SC T c T* ~ ∆ PG~λ * PG NM 1530009-3 Int. J. Mod. Phys. B 2015.29. Downloaded from www.worldscientific.com by UNIVERSITY OF CALIFORNIA @ SAN DIEGO on 08/24/15. For personal use only. 1530009-4 Int. J. Mod. Phys. B 2015.29. Downloaded from www.worldscientific.com by UNIVERSITY OF CALIFORNIA @ SAN DIEGO on 08/24/15. For personal use only.Kinetic-energy-driven superconductivity in cuprate superconductors singlets would become charged, resulting in a SC-state. The RVB state is fundamentally different from the conventional Néel state in which the doped charge carrier can move freely among the RVB spin liquid and then a better compromise between the charge-carrier kineti...

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Section: Conclusion and Discussionmentioning

confidence: 99%

Kinetic-energy-driven superconductivity in cuprate superconductors

Feng

Lan

Zhao

et al. 2015

Int. J. Mod. Phys. B

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“…These results illustrate that the hopping disorder preserves the TQPT in the system, however, it has a larger influence on the detailed behavior of the TQPT than the local potential disorders, which can be seen from the scaling behavior of height of the peak in fidelity susceptibility. Finally, we are going to investigate the off-diagonal disorder, which has been extensively studied in high temperature superconductors 32 . The off-diagonal disorder can be understood as a static fluctuation of the amplitude of superconducting gap.…”

Section: Disorder Effectsmentioning

confidence: 99%

Fidelity in topological superconductors with end Majorana fermions

2013

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Fidelity and fidelity susceptibility are introduced to investigate the topological superconductors with end Majorana fermions. A general formalism is established to calculate the fidelity and fidelity susceptibility by solving Bogoliubov-de Gennes equations. It is shown that the fidelity susceptibility manifest itself as a peak at the topological quantum phase transition point for homogeneous Kitaev wire, thus serves as a valid indicator for the topological quantum phase transition which signals the appearance of Majorana fermions. The effect of disorders is investigated within this formalism. We consider three disordered systems and observe fidelity susceptibility peak in all of them. By analyzing the susceptibility peak, we notice that the local potential disorders and the hopping disorders can shift the phase transition point, while off-diagonal disorders have no obvious influence. Our results confirm that the existence of topological quantum phase transition is robust to these disorders, while the behavior of the phase transition might be influenced by disorders.

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Electronic Structure Of cuprate Superconductors in The Presence of Out-of-Plane Impurities

Wang

Feng

2010

NATO Science for Peace and Security Series B: Physics and Biophysics

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Anisotropic microwave conductivity of cuprate superconductors in the presence of CuO chain-induced impurities

Cited by 9 publications

References 24 publications

Kinetic-energy-driven superconductivity in cuprate superconductors

Kinetic-energy-driven superconductivity in cuprate superconductors

Fidelity in topological superconductors with end Majorana fermions

Electronic Structure Of cuprate Superconductors in The Presence of Out-of-Plane Impurities

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