Multiband superconductivity in high Tc cuprates and diborides

被引：19

作者：

Bianconi, A ^{[1
]}

机构：

[1] Univ Roma La Sapienza, Dept Phys, I-00185 Rome, Italy

来源：

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2006年 / 67卷 / 1-3期

关键词：

D O I：

10.1016/j.jpcs.2005.10.160

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The normal state of magnesium diboride, the simplest metallic system showing the macroscopic quantum coherence at high temperature (high T. superconductivity HTcS), shows some features that are common with the cuprates, shedding light on the pairing mechanism for T-c amplification in HTcS: (1) the system is made of two or more electronic components associated with multiple Fermi surface portions; (2) the chemical potential is tuned where the Fermi level in one Fermi surface portion is near the crossing of an electronic topological transition (ETT) where the Fermi surface changes its topology; and (3) an optical phonon branch shows softening due to an extended Khon anomaly (EKA) over a large wave vector range. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：567 / 570

页数：4

共 30 条

[1] Extreme electron-phonon coupling in boron-based layered superconductors [J].

An, JM ;

Savrasov, SY ;

Rosner, H ;

Pickett, WE .

PHYSICAL REVIEW B, 2002, 66 (22) :1-4

[2] Signature of optimal doping in Hall-effect measurements on a high-temperature superconductor [J].

Balakirev, FF ;

Betts, JB ;

Migliori, A ;

Ono, S ;

Ando, Y ;

Boebinger, GS .

NATURE, 2003, 424 (6951) :912-915

[3] Scaling of the critical temperature with the Fermi temperature in diborides [J].

Bianconi, A ;

Agrestini, S ;

Di Castro, D ;

Campi, G ;

Zangari, G ;

Saini, NL ;

Saccone, A ;

De Negri, S ;

Giovannini, M ;

Profeta, G ;

Continenza, A ;

Satta, G ;

Massidda, S ;

Cassetta, A ;

Pifferi, A ;

Colapietro, M .

PHYSICAL REVIEW B, 2002, 65 (17) :1745151-1745155

[4] Phonon dispersion and electron-phonon coupling in MgB2 and AlB2 [J].

Bohnen, KP ;

Heid, R ;

Renker, B .

PHYSICAL REVIEW LETTERS, 2001, 86 (25) :5771-5774

[5] Determination of the Fermi surface of MgB2 by the de Haas-van Alphen effect -: art. no. 037003 [J].

Carrington, A ;

Meeson, PJ ;

Cooper, JR ;

Balicas, L ;

Hussey, NE ;

Yelland, EA ;

Lee, S ;

Yamamoto, A ;

Tajima, S ;

Kazakov, SM ;

Karpinski, J .

PHYSICAL REVIEW LETTERS, 2003, 91 (03)

[6] In-plane anisotropy and temperature dependence of oxygen phonon modes in YBa2Cu3O6.95 -: art. no. 014517 [J].

Chung, JH ;

Egami, T ;

McQueeney, RJ ;

Yethiraj, M ;

Arai, M ;

Yokoo, T ;

Petrov, Y ;

Mook, HA ;

Endoh, Y ;

Tajima, S ;

Frost, C ;

Dogan, F .

PHYSICAL REVIEW B, 2003, 67 (01)

[7] Nanometer scale mapping of the density of states in an inhomogeneous superconductor [J].

Cren, T ;

Roditchev, D ;

Sacks, W ;

Klein, J .

EUROPHYSICS LETTERS, 2001, 54 (01) :84-90

[8] Anomalous dispersion of longitudinal optical phonons in Nd1.86Ce0.14CuO4+δ determined by inelastic x-ray scattering -: art. no. 167002 [J].

d'Astuto, M ;

Mang, PK ;

Giura, P ;

Shukla, A ;

Ghigna, P ;

Mirone, A ;

Braden, M ;

Greven, M ;

Krisch, M ;

Sette, F .

PHYSICAL REVIEW LETTERS, 2002, 88 (16) :4

[9] Nanoscale one-dimensional scattering resonances in the CuO chains of YBa2Cu3O6+x -: art. no. 097002 [J].

Derro, DJ ;

Hudson, EW ;

Lang, KM ;

Pan, SH ;

Davis, JC ;

Markert, JT ;

de Lozanne, AL .

PHYSICAL REVIEW LETTERS, 2002, 88 (09) :4-970024

[10]

Di Castro D, 2002, EUROPHYS LETT, V58, P278, DOI 10.1209/epl/i2002-00634-2

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