Experimental Investigation of the Competing Orders and Quantum Criticality in Hole- and Electron-Doped Cuprate Superconductors

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dc.creatorYeh, N. -C.
dc.creatorChen, C. -T.
dc.creatorZapf, V. S.
dc.creatorBeyer, A. D.
dc.creatorHughes, C. R.
dc.creatorPark, M. -S.
dc.creatorKim, K. -H.
dc.creatorLee, S. -I.
dc.date2004-08-04
dc.date.accessioned2026-07-07T06:31:42Z
dc.date.available2026-07-07T06:31:42Z
dc.descriptionWe investigate the issues of competing orders and quantum criticality in cuprate superconductors via experimental studies of the high-field thermodynamic phase diagrams and the quasiparticle tunneling spectroscopy. Our results suggest substantial field-induced quantum fluctuations in all cuprates investigated, and their correlation with quasiparticle spectra implies that both electron- (n-type) and hole-doped (p-type) cuprate superconductors are in close proximity to a quantum critical point that separates a pure superconducting (SC) phase from a phase consisting of coexisting SC and a competing order. We further suggests that the relevant competing order is likely a spin-density wave (SDW) or a charge density wave (CDW), which can couple to an in-plane Cu-O bond stretching longitudinal optical (LO) phonon mode in the p-type cuprates but not in the n-type cuprates. This cooperative interaction may account for the pseudogap phenomenon above Tc only in the p-type cuprate superconductors.
dc.description10 pages, 4 figures. Invited paper for the 2004 Taiwan International Conference on Superconductors
dc.identifierhttps://arxiv.org/abs/cond-mat/0408105
dc.identifierhttp://arxiv.org/abs/cond-mat/0408105
dc.identifierChinese Journal of Physics 43, Suppl.2, 505 (2005)
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/98684
dc.subjectSuperconductivity
dc.titleExperimental Investigation of the Competing Orders and Quantum Criticality in Hole- and Electron-Doped Cuprate Superconductors
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