Pairing in cuprates from high-energy electronic states

被引：107

作者：

Santander-Syro, AF

Lobo, RPSM

Bontemps, N

Konstantinovic, Z

Li, ZZ

Raffy, H

机构：

[1] Ecole Super Phys & Chim Ind Ville Paris, Lab Phys Solide, CNRS, UPR 5, F-75231 Paris 5, France

[2] Univ Paris 11, Phys Solides Lab, CNRS, UMR 8502, F-91405 Orsay, France

来源：

EUROPHYSICS LETTERS | 2003年 / 62卷 / 04期

关键词：

D O I：

10.1209/epl/i2003-00388-9

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The in-plane optical conductivity of Bi2Sr2CaCu2O8+delta films with small carrier density (underdoped) up to large carrier density (overdoped) is derived from accurate reflectivity data. Integrating the conductivity up to increasingly higher frequencies yields the energy scale involved in the formation of the condensate. At least in the underdoped sample, states extending up to 2 eV contribute to the superfluid. This anomalously large energy scale may be assigned to a change of in-plane kinetic energy at the superconducting transition, and is compatible with an electronic pairing mechanism.

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收藏

页码：568 / 574

页数：7

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共 30 条

[11] TEMPERATURE-VARIATIONS OF THE ENERGY-SPECTRUM OF HIGH-TEMPERATURE SUPERCONDUCTORS NEAR THE FERMI-LEVEL SEEN BY OPTICAL-ABSORPTION [J].

FUGOL, I ;

SAMOVAROV, V ;

RATNER, A ;

ZHURAVLEV, V ;

SAEMANNISCHENKO, G ;

HOLZAPFEL, B ;

MEYER, O .

SOLID STATE COMMUNICATIONS, 1993, 86 (06) :385-391

[12] SUPERCONDUCTORS THAT CHANGE COLOR WHEN THEY BECOME SUPERCONDUCTING [J].

HIRSCH, JE .

PHYSICA C, 1992, 201 (3-4) :347-361

[13] Superconductivity from undressing [J].

Hirsch, JE .

PHYSICAL REVIEW B, 2000, 62 (21) :14487-14497

[14] Optical sum rule violation, superfluid weight, and condensation energy in the cuprates [J].

Hirsch, JE ;

Marsiglio, F .

PHYSICAL REVIEW B, 2000, 62 (22) :15131-15150

[15] OPTICAL EVIDENCE OF AN ELECTRONIC CONTRIBUTION TO THE PAIRING INTERACTION IN SUPERCONDUCTING TL2BA2CA2CU3O10 [J].

HOLCOMB, MJ ;

COLLMAN, JP ;

LITTLE, WA .

PHYSICAL REVIEW LETTERS, 1994, 73 (17) :2360-2363

[16] Interlayer conductivity in the superconductor Tl2Ba2CuO6+δ:: Energetics and energy scales [J].

Katz, AS ;

Woods, SI ;

Singley, EJ ;

Li, TW ;

Xu, M ;

Hinks, DG ;

Dynes, RC ;

Basov, DN .

PHYSICAL REVIEW B, 2000, 61 (09) :5930-5933

[17] Normal state magnetoresistance in Bi2Sr2CaCu2O8+δ thin films with different oxygen contents [J].

Konstantinovic, Z ;

Laborde, O ;

Monceau, P ;

Li, ZZ ;

Raffy, H .

PHYSICA B-CONDENSED MATTER, 1999, 259-61 :569-570

[18] The condensation energy and pseudogap energy scale of Bi:2212 from the electronic specific heat [J].

Loram, JW ;

Luo, JL ;

Cooper, JR ;

Liang, WY ;

Tallon, JL .

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2000, 341 :831-834

[19] Comparative analysis of the optical spectra of YBa2Cu3O7 [J].

Maksimov, EG ;

Kaufmann, HJ ;

Salje, EKH ;

De Wilde, Y ;

Bontemps, N ;

Contour, JP .

SOLID STATE COMMUNICATIONS, 1999, 112 (08) :449-454

[20] Superconductivity-induced transfer of in-plane spectral weight in Bi2Sr2Ca2O8+δ [J].

Molegraaf, HJA ;

Presura, C ;

van der Marel, D ;

Kes, PH ;

Li, M .

SCIENCE, 2002, 295 (5563) :2239-2241