Distinct charge and spin gaps in underdoped YBa2Cu3O7-δ from analysis of NMR, neutron scattering, tunneling, and quasiparticle relaxation experiments

被引：40

作者：

Mihailovic, D ^{[1
]}

Kabanov, VV ^{[1
]}

Zagar, K ^{[1
]}

Demsar, J ^{[1
]}

机构：

[1] Jozef Stefan Inst, Dept Solid State Phys, Ljubljana 1001, Slovenia

来源：

PHYSICAL REVIEW B | 1999年 / 60卷 / 10期

关键词：

D O I：

10.1103/PhysRevB.60.R6995

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A systematic quantitative comparison of "pseudogap" values obtained from the analysis of charge and spin excitation spectroscopies in underdoped YBa2Cu3O7-delta using a temperature-independent gap shows two distinct excitations, one visible in spin-flip spectroscopies like NMR and spin-polarized neutron scattering, and the other in charge excitation spectroscopies like single-particle tunneling and time-resolved quasiparticle relaxation. Both appear to decrease with doping x approximately as 1/x and are T independent, existing above and below T-c. We suggest that the charge excitation can be attributed to a pair-breaking local gap, while the spin excitation can be explained by an intragap local triplet-state. [S0163-1829(99)50634-6].

引用

页码：R6995 / R6997

页数：3

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