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【资源】《Science》2009年08月28日出品
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《Science》2009年08月28日出品 Spectroscopic Fingerprint of Phase-Incoherent Superconductivity in the Underdoped Bi2Sr2CaCu2O8+d Jhinhwan Lee,1 K. Fujita, 1,2 A. R. Schmidt,1 Chung Koo Kim,1 H. Eisaki,3 S. Uchida,2 J. C. Davis1,4* A possible explanation for the existence of the cuprate “pseudogap” stateisthatitisad-wave superconductor without quantum phase rigidity. Transport and thermodynamic studies provide compelling evidence that supports this proposal, but few spectroscopic explorations of it have been made. One spectroscopic signature of d-wave superconductivity is the particle-hole symmetric “octet” of dispersive Bogoliubov quasiparticle interference modulations. Here we report on this octet’sevolution from low temperatures to well into the underdoped pseudogap regime. No pronounced changes occur in the octet phenomenology at the superconductor’s critical temperature Tc, and it survives up to at least temperature T ~1.5 Tc. In this pseudogap regime, we observe the detailed phenomenology that was theoretically predicted for quasiparticle interference in a phase-incoherent d-wave superconductor. Thus, our results not only provide spectroscopic evidence to confirm and extend the transport and thermodynamics studies, but they also open the way for spectroscopic explorations of phase fluctuation rates, their effects on the Fermi arc, and the fundamental source of the phase fluctuations that suppress superconductivity in underdoped cuprates. 下载地址： http://d.namipan.com/d/6818850e1 ... 12633701029351ca400 http://d.namipan.com/d/6818850e1 ... 12633701029351ca400 下载测试正常，祝大家工作顺利。 http://d.namipan.com/d/6818850e17d4ebffb722878a63f3a12633701029351ca400 |
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沙发? 2楼2009-08-29 09:49:17
3楼2009-08-29 13:32:00
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