PROPERTIES OF VORTEX STATES IN HIGH TEMPERATURE SUPERCONDUCTORS

Year 2010, Issue: 023, 11 - 22, 15.12.2010

Seniye Karakaya , Mustafa Akarsu Senem Aydoğu Ömer Özbaş

Abstract

This
paper reviews vortex behavior and formation of vortex liquid due to vortex
lattice melting in high temperature superconductors (HTSC). The microscopic
theory of superconductivity and the basic concepts needed to understand the
magnetic properties of  type I and type
II superconductors are discussed briefly. Magnetic states of superconductors
are described and magnetic phase diagrams are presented. The transition from
the vortex solid to the vortex liquid phase for HTSC is described. Effects of
the point, columnar disorders and strong thermal fluctuations on the character
of the transition between these two phases are studied. The effects on the
vortex solid to liquid transition of high magnetic fields applied parallel to
the superconducting layers are also studied.

Keywords

Superconductivity, Vortex state, Vortex liquid, Abrikosov vortex

YÜKSEK SICAKLIK SÜPERİLETKENLERİNDE VORTEX BÖLGESİNİN ÖZELLİKLERİ

Abstract

Bu çalışma, yüksek sıcaklık
süperiletkenlerindeki vortex örgü erimesi sebebiyle vortex sıvının oluşumunu ve
davranışını özetler. Süperiletkenliğin mikroskobik teorisi ve I.
tip ve II. tip süperiletkenlerin manyetik özelliklerinin anlaşılması için
gerekli temel kavramlar kısaca tartışıldı. Süperiletkenlerin  manyetik durumları ifade edildi ve manyetik
faz diyagramları gösterildi. Yüksek sıcaklık süperiletkenleri için vortex katıdan
vortex sıvı faza geçiş ifade edilmektedir. Bu iki faz arasındaki geçişin
özelliği olan vortexlerin vortex sütunlarındaki bozulma, güçlü termal
dalgalanmalar ve nokta kusurlar araştırıldı. Aynı zamanda , süperiletken
tabakalara paralel olarak  uygulanan
yüksek manyetik alanların vortex katı-sıvı geçişi üzerine etkileri tartışıldı.

Keywords

Süperiletkenlik, Vortex durum, Vortex sıvı, Abrikosov vortex

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