Evolution of the spin gap upon doping a 2-leg ladder

被引：23

作者：

Poilblanc, D ^{[1
]}

Chiappa, O

Riera, J

White, SR

Scalapino, DJ

机构：

[1] Univ Toulouse 3, Phys Quant Lab, F-31062 Toulouse, France

[2] Univ Toulouse 3, UMR CNRS 5626, F-31062 Toulouse, France

[3] Univ Nacl Rosario, Consejo Nacl Invest Cient & Tecn, Inst Fis Rosario, RA-2000 Rosario, Santa Fe, Argentina

[4] Univ Nacl Rosario, Dept Fis, RA-2000 Rosario, Santa Fe, Argentina

[5] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA

[6] Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA

来源：

PHYSICAL REVIEW B | 2000年 / 62卷 / 22期

关键词：

D O I：

10.1103/PhysRevB.62.R14633

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The evolution of the spin gap of a 2-leg ladder upon doping depends upon the nature of the lowest triplet excitations in a ladder with two holes, Here we study this evolution using various numerical techniques for a t-t'-J ladder as the next-near-neighbor hopping t' is varied. We find that depending on the value of t', the spin gap can evolve continuously or discontinuously and the lowest triplet state can correspond to a magnon, a bound magnon-hole-pair, or two separate quasiparticles. previous experimental results on the superconducting two-leg ladder Sr14-xCaxCu24O41 are discussed.

引用

页码：14633 / 14636

页数：4

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