Published February 2004 | Version v1
Journal article Metadata-only

On the two-parametric theory of superconductivity

Creators

  • 1. Rossijskij Nauchnyj Tsentr Kurchatovskij Inst., Moscow (Russian Federation)

Description

The closed system of equations for the superconducting parameter of the Δ order and spin susceptibility is obtained on the basis of the notion on the availability of the spin fluctuations in the Hubbard model. The threshold cases for the low temperatures and for the temperature, close to the temperature of the superconducting transition, are considered. The temperature dependence of the Δ parameter and the Knight shift value are obtained. The conditions, whereby the II-order phase transition is replaced by the I-order phase transition, are identified

Abstract (Russian)

На основе представления о наличии спиновых флуктуаций в модели Хаббарда получена замкнутая система уравнений для сверхпроводящего параметра порядка Δ и спиновой восприимчивости. Рассмотрены предельные случаи низких температур и температуры, близкой к температуре сверхпроводящего перехода. Получена температурная зависимость параметра Δ и величины найтовского сдвига. Установлены условия, при которых фазовый переход II-го рода сменяется фазовым переходом I-го рода

Additional details

Additional titles

Original title (Russian)
К двухпараметрической теории сверхпроводимости

Publishing Information

Journal Title
Pis'ma v Zhurnal Ehksperimental'noj i Teoreticheskoj Fiziki
Journal Volume
79
Journal Issue
3-4
Journal Page Range
p. 143-147
ISSN
0370-274X
CODEN
PZETAB

INIS

Country of Publication
Russian Federation
Country of Input or Organization
Russian Federation
INIS RN
36037677
Subject category
S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
Descriptors DEI
ELECTRON DENSITY; KNIGHT SHIFT; MAGNETIC SUSCEPTIBILITY; ORDER PARAMETERS; PARAMETRIC ANALYSIS; PHASE TRANSFORMATIONS; SPIN; SUPERCONDUCTIVITY; TEMPERATURE DEPENDENCE; TRANSITION TEMPERATURE
Descriptors DEC
ANGULAR MOMENTUM; ELECTRIC CONDUCTIVITY; ELECTRICAL PROPERTIES; MAGNETIC PROPERTIES; PARTICLE PROPERTIES; PHYSICAL PROPERTIES; THERMODYNAMIC PROPERTIES

Optional Information

Notes
6 refs., 5 figs.