Pseudogap and quantum-transition phenomenology in HTS cuprates

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dc.creatorTallon, J. L.
dc.creatorLoram, J. W.
dc.creatorPanagopoulos, C.
dc.date2002-11-04
dc.date2002-11-14
dc.date.accessioned2026-07-07T02:48:03Z
dc.date.available2026-07-07T02:48:03Z
dc.descriptionThe low-energy excitation spectrum of HTS cuprates is examined in the light of thermodynamic, transport, quasiparticle and spin properties. Changes in the thermodynamic spectrum associated with the normal-state pseudogap disappear abruptly at a critical doping state, $p_{crit}$ = 0.19 holes per Cu. Moreover, ARPES data at 100K show that heavily damped quasiparticles (QP) near ($π$,0) suddenly recover long lifetimes at $p_{crit}$, reflecting an abrupt loss of scattering from AF spin fluctuations. This picture is confirmed by $μ$SR zero-field relaxation measurements which indicate the presence of a novel quantum glass transition at $p_{crit}$. Consistent with this picture resistivity studies on thin films of Y$_{0.7}$Ca$_{0.3}$Ba$_2$Cu$_3$O$_{7-δ}$ reveal linear behavior confined to a V-shaped domain focussed on $p_{crit}$ at $T$=0. The generic phase behavior of the cuprates may be governed by quantum critical fluctuations above $p_{crit}$ and the pseudogap appears to be caused by short-range AF correlations.
dc.descriptionMOS2002 oral paper, 8 pages, 3 colour figures. Paper in press J. Low Temp. Phys Replacement adds reference 19
dc.identifierhttps://arxiv.org/abs/cond-mat/0211048
dc.identifierhttp://arxiv.org/abs/cond-mat/0211048
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/20249
dc.subjectSuperconductivity
dc.titlePseudogap and quantum-transition phenomenology in HTS cuprates
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