Pairing Symmetry, Spin Gap, and More in HTSC Cuprates

Dayan, Moshe

doi:10.1007/s10948-014-2549-5

Cited by 2 publications

(2 citation statements)

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“…The first suggestion that comes to mind is Eq. (18a) has actually been used, for the approximation of k  at low energies throughout my former works [2,12,14]. However, here we suggest that when the wavevector k is to be specifically expressed, Eq.…”

Section: F Qk mentioning

confidence: 90%

“…At the Fermi level |k| = k = k F and when one of them tends to zero, the other one tends to √ 2k F . Equation (18a) has actually been used for the approximation of εk at low energies throughout my former works [2,12,14]. However, here, we suggest that when the wave vectork is to be specifically expressed, (17) should be replaced by (18b) and not only as a low-energy approximation.…”

Section: The Low-energy Inward Dispersionmentioning

confidence: 90%

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The Inward Dispersion of the Neutron Scattering Experiments in HTSC Cuprates

Dayan¹

2016

J Supercond Nov Magn

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The theory of the high-temperature superconducting cuprates, which is based on the condensation of holes into strings in checkerboard geometry, was successful to explain the elastically scattered neutrons by spin waves. Here, it is extended to analyze the inward dispersion curve of its inelastic counterpart, up to the resonance energy (E res ). This extension is done by applying the perturbation theory of the linear response to the condensed strings. The approximated susceptibility is derived by means of the ring diagram. The dispersion relation is obtained from the dispersion of the poles of the susceptibility integral. It is found that the particle-anti-particle pair that yields the susceptibility is the time reversal pair where the particle momentum is k in phase A and the anti-particle momentum is −k in phase B. The dispersion is found to be in agreement with experiment, subject to some suggested corrections. The weak intensity by the resonance energy, as well as the dispersion, is speculated to be modified due to interference with spin waves that are caused by direct spin flip, as in the undoped mother materials.

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Section: F Qk mentioning

confidence: 90%