Possible High T c Superconductivity in the Ba — La — Cu — O System

Bednorz, J. G.; Müller, K. A.

doi:10.1007/978-94-011-1622-0_32

Cited by 441 publications

(661 citation statements)

References 14 publications

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“…While the fundamental frequency continues to be well described by the standard theory for oscillations corresponding to fixed µ, the second harmonic can be dominated by a new contri- bution of relative weight 2Γk 1 2 /κ 2 (see equation (2)) resulting from the oscillations in µ. Here Γ represents the fraction of the total density-of-states at the Fermi level associated with the postulated two-dimensional pocket.…”

Section: Discussionmentioning

confidence: 95%

“…A lthough high-T c cuprate superconductors have a history spanning a quarter of a century 1,2 , quantum oscillations in these materials have only been measured as recently as a few years ago [3][4][5][6][7][8][9][10][11][12] , by employing high magnetic fields to weaken superconductivity. Interestingly, their advent has signalled a reevaluation of the electronic structure in the normal state of the underdoped cuprates.…”

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confidence: 99%

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Chemical potential oscillations from nodal Fermi surface pocket in the underdoped high-temperature superconductor YBa2Cu3O6+x

Sebastian¹,

Harrison²,

Altarawneh³

et al. 2011

Nat Commun

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The electronic structure of the normal state of the underdoped cuprates has thus far remained mysterious, with neither the momentum space location nor the charge carrier type of constituent small Fermi surface pockets being resolved. Whereas quantum oscillations have been interpreted in terms of a nodal-antinodal Fermi surface including electrons at the antinodes, photoemission indicates a solely nodal density-of-states at the Fermi level. Here we examine both these possibilities using extended quantum oscillation measurements. second harmonic quantum oscillations in underdoped YBa 2 Cu 3 o 6 + x are shown to arise chiefly from oscillations in the chemical potential. We show from the relationship between the phase and amplitude of the second harmonic with that of the fundamental quantum oscillations that there exists a single carrier Fermi surface pocket, likely located at the nodal region of the Brillouin zone, with the observed multiple frequencies arising from warping, bilayer splitting and magnetic breakdown.

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Section: Discussionmentioning

confidence: 95%

mentioning

confidence: 99%

Chemical potential oscillations from nodal Fermi surface pocket in the underdoped high-temperature superconductor YBa2Cu3O6+x

Sebastian¹,

Harrison²,

Altarawneh³

et al. 2011

Nat Commun

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show abstract

“…The idea that the two-dimensional repulsive Hubbard model could exhibit superconductivity had been investigated in the context of heavy-fermion superconductors [16] slightly before the discovery of the cuprate materials, and the number of papers really proliferated after the famous experiment in 1986 [17]. Early exact results from the determinant quantum Monte Carlo (DQMC) method indicated enhanced s-wave [16] and d-wave [18,19] pairing susceptibilities [20].…”

Section: Introductionmentioning

confidence: 99%

Dynamical mean-field theory study of stripe order and d -wave superconductivity in the two-dimensional Hubbard model

Vanhala

Törmä

2018

Phys. Rev. B

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We use cellular dynamical mean-field theory with extended unit cells to study the ground state of the two-dimensional repulsive Hubbard model at finite doping. We calculate the energy of states where d-wave superconductivity coexists with spatially nonuniform magnetic and charge order and find that they are energetically favored in a large doping region as compared to the uniform solution. We also study the spatial form of the density and the superconducting and magnetic order parameters at different doping values.

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“…Scientists all over the world, however, have never stopped researches on superconductivity since the Dutch physicist Heike Kamerlingh Onnes first found the superconducting phenomenon in 1911. After the discovery of the first high-temperature superconductor (HTS) LaBaCuO by J. G. Bednorz and K. A. Mueller [1], scientists of IBM in Zurich, in 1986, the increase of superconducting critical temperatures has brought the researches a big step forwardly and triggered its unprecedented applications. Superconductivity has wide prospect of applications in the areas of mass transportation, optoelectronics, military, aviation and aerospace, etc.…”

Section: Introductionmentioning

confidence: 99%

Learning an Application of Superconductivity in Modern Mass Transportation

Jin¹,

Liu²,

Li³

2012

International Journal of Railway

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Applications of superconducting technology in transportation is more straightforward than others, such as magnetic levitation (maglev) trains. A maglev train is of high speed & low power-consumption, environmental friendly and safe, accompanied by some drawbacks. This article will introduce the application of superconducting technology in the urban mass transport system, and the bottleneck of this application.

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Possible High T c Superconductivity in the Ba — La — Cu — O System

Cited by 441 publications

References 14 publications

Chemical potential oscillations from nodal Fermi surface pocket in the underdoped high-temperature superconductor YBa2Cu3O6+x

Chemical potential oscillations from nodal Fermi surface pocket in the underdoped high-temperature superconductor YBa2Cu3O6+x

Dynamical mean-field theory study of stripe order and d -wave superconductivity in the two-dimensional Hubbard model

Learning an Application of Superconductivity in Modern Mass Transportation

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