ANOMALIES IN SPECIFIC HEAT: THE INFLUENCE OF SPIN FLUCTUATIONS AND SUPERCONDUCTIVITY IN CUPRATES

被引：3

作者：

Mohanta, K. L. ^{[1
]}

Rout, G. C. ^{[2
]}

机构：

[1] Siksha O Anusandhan Univ, Inst Tech Educ & Res, Dept Phys, Bhubaneswar 751030, Odisha, India

[2] FM Univ, PG Dept Appl Phys & Ballist, Balasore 756019, Odisha, India

来源：

MODERN PHYSICS LETTERS B | 2013年 / 27卷 / 13期

关键词：

Heat capacity; spin fluctuations; high-T-c superconductivity; exchange interaction; HIGH-TEMPERATURE SUPERCONDUCTORS; PAIRING SYMMETRY; DEPENDENCE; ENERGY; WAVE; GAP; PSEUDOGAP;

D O I：

10.1142/S0217984913500899

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report here a microscopic theory of the temperature dependence of specific heat in high-T-c cuprate superconductors. The system is described by a model Hamiltonian consisting the antiferromagnetic spin fluctuations due to the impurity f-electrons as well as the conduction electrons, besides the superconducting interaction due to the itinerant electrons. The Hamiltonian is treated within a mean-field approach. The transverse spin fluctuation parameters and the superconducting gap are calculated by Zubarev's Green's function technique and solved self-consistently. The temperature dependent specific heat is calculated from the free energy in order to study the anomalies appearing at the spin fluctuation and superconducting transition temperatures. The evolutions of these anomalies are studied by varying the model parameters of the systems and results are discussed in reference to experimental observations.

引用

页数：10

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