AAU-ETD AAU-ETD
 

Addis Ababa University Libraries Electronic Thesis and Dissertations: AAU-ETD! >
Faculty of Science >
Thesis - Physics >

Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/3650

Title: THE STUDY OF INTERPLAY BETWEEN SPIN DENSITY WAVE AND SUPERCONDUCTIVITY IN FERROPNICTIDES
Authors: WUBISHET, AHMED
Advisors: Prof.P.Singh
Keywords: SUPERCONDUCTIVITY
SPIN DENSITY WAVE
Copyright: Jun-2011
Date Added: 6-Nov-2012
Publisher: AAU
Abstract: This work focuses on the study of interplay between superconductivity and spin density wave in Fe- based superconductors.The e ect of magnetic ordering state on transition temperature(TC) has been investigated in Fe{based superconductors with in the BCS theory,irrespective of the pairing mechanism. The expression for the transition temperatures(Tc and TSDW) as a function of superconducting order parameter( S) and magnetic order parameter( SDW) has been obtained using the model Hamiltonian for the system and Green's function technique and their application have been studied.And their values has been calculated numerically for suitable values of system parameters. The interplay of magnetic ordering state and superconductivity have been found crucial for enhancing TC.It is also found that the presence of magnetic ordering state does not increase TC rather it decreases,but the suppression of this state should increase the superconducting transition temperature(TC). On the other hand,for suitable value of the parameters,we report the magnetic order dependent phase diagrams Which shows the interplay of superconductivity and spin density wave in some Fe based superconductors. The results are in general agreement with experimental observations and theoretical models of ferropnictides. vii
Description: A THESIS PRESENTED TO THE SCHOOL OF GRADUATE STUDIES ADDIS ABABA UNIVERSITY IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF SCIENCE IN PHYSICS
URI: http://hdl.handle.net/123456789/3650
Appears in:Thesis - Physics

Files in This Item:

File Description SizeFormat
Wubshet.pdf1.18 MBAdobe PDFView/Open

Items in the AAUL Digital Library are protected by copyright, with all rights reserved, unless otherwise indicated.

 

  Last updated: May 2010. Copyright © Addis Ababa University Libraries - Feedback