THEORY OF THE ISOTOPE EFFECT AND SUPERCONDUCTING TRANSITION TEMPERATURE IN HIGH-Tc OXIDES

被引：1

作者：

Bechlaghem, A. ^{[1
]}

Bourbie, D. ^{[1
]}

机构：

[1] Univ Oran, LSMC, Es Senia 31100, Algeria

来源：

MODERN PHYSICS LETTERS B | 2011年 / 25卷 / 26期

关键词：

Superconductivity; isotope coefficient; van Hove singularity; transition temperature; electron-phonon interaction; magnetic excitations; Debye energy; VAN-HOVE SINGULARITY; VANHOVE SINGULARITY; PENETRATION DEPTH; GAP RATIO; MODEL; LA2-XSRXCUO4; COEFFICIENT; SCENARIO; LA2CUO4; LATTICE;

D O I：

10.1142/S0217984911027248

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Analytical expressions for the superconducting transition temperature T-c and the isotope coefficient alpha have been obtained for the case where the Fermi level is close to the van Hove singularity. In this approach, we consider two interactions, the first related to the phonons and the second relevant to the magnetic excitations. Our result shows that the isotope coefficient alpha decreases with the superconducting transition temperature T-c in qualitative agreement with experimental data.

引用

页码：2069 / 2078

页数：10

共 33 条

[1] OXYGEN ISOTOPE EFFECT IN LA-SR-CU-O SYSTEM WITH TC MODIFIED BY NI AND ZN DOPING [J].

BABUSHKINA, N ;

INYUSHKIN, A ;

OZHOGIN, V ;

TALDENKOV, A ;

KOBRIN, I ;

VOROBEVA, T ;

MOLCHANOVA, L ;

DAMYANETS, L ;

UVAROVA, T ;

KUZAKOV, A .

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 1991, 185 (pt 2) :901-902

[2] SUPERCONDUCTIVITY AND CHARGE-DENSITY WAVES [J].

BALSEIRO, CA ;

FALICOV, LM .

PHYSICAL REVIEW B, 1979, 20 (11) :4457-4464

[3] ISOTOPE EFFECT IN THE HIGH-TC SUPERCONDUCTORS BA2YCU3O7 AND BA2EUCU3O7 [J].

BATLOGG, B ;

CAVA, RJ ;

JAYARAMAN, A ;

VANDOVER, RB ;

KOUROUKLIS, GA ;

SUNSHINE, S ;

MURPHY, DW ;

RUPP, LW ;

CHEN, HS ;

WHITE, A ;

SHORT, KT ;

MUJSCE, AM ;

RIETMAN, EA .

PHYSICAL REVIEW LETTERS, 1987, 58 (22) :2333-2336

[4] NONZERO ISOTOPE EFFECT IN LA1.85SR0.15CUO4 [J].

BATLOGG, B ;

KOUROUKLIS, G ;

WEBER, W ;

CAVA, RJ ;

JAYARAMAN, A ;

WHITE, AE ;

SHORT, KT ;

RUPP, LW ;

RIETMAN, EA .

PHYSICAL REVIEW LETTERS, 1987, 59 (08) :912-914

[5] PROPERTIES OF THE SUPERCONDUCTING GAP RATIO IN THE VAN HOVE SCENARIO OF HIGH-Tc OXIDES [J].

Bechlaghem, A. ;

Bourbie, D. .

MODERN PHYSICS LETTERS B, 2010, 24 (23) :2395-2401

[6] Gap energy, isotope effect and coherence length in high Tc-oxides [J].

Bechlaghem, A ;

Mostefa, M ;

Zanoun, Y .

INTERNATIONAL JOURNAL OF MODERN PHYSICS B, 1999, 13 (32) :3915-3925

[7] STATIC AND DYNAMIC SPIN FLUCTUATIONS IN SUPERCONDUCTING LA2-XSRXCUO4 [J].

BIRGENEAU, RJ ;

ENDOH, Y ;

KAKURAI, K ;

HIDAKA, Y ;

MURAKAMI, T ;

KASTNER, MA ;

THURSTON, TR ;

SHIRANE, G ;

YAMADA, K .

PHYSICAL REVIEW B, 1989, 39 (04) :2868-2871

[8] Real and marginal isotope effects in cuprate superconductors [J].

Bishop, A. R. ;

Bussmann-Holder, A. ;

Dolgov, O. V. ;

Furrer, A. ;

Kamimura, H. ;

Keller, H. ;

Khasanov, R. ;

Kremer, R. K. ;

Manske, D. ;

Mueller, K. A. ;

Simon, A. .

JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM, 2007, 20 (05) :393-396

[9] ISOTOPE EFFECT IN YBA2-XLAXCU3OZ - EVIDENCE FOR PHONON-MEDIATED HIGH-TEMPERATURE SUPERCONDUCTIVITY [J].

BORNEMANN, HJ ;

MORRIS, DE .

PHYSICAL REVIEW B, 1991, 44 (10) :5322-5325

[10] Pseudogap and its influence on normal and superconducting states of cuprates [J].

Chaudhuri, I ;

Taraphder, A ;

Ghatak, SK .

PHYSICA C, 2001, 353 (1-2) :49-59

← 1 2 3 4 →