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Addis Ababa University Libraries Electronic Thesis and Dissertations: AAU-ETD! >
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http://hdl.handle.net/123456789/4224
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| Title: | IRON PNICTIDE SUPERCONDUCTORS |
| Authors: | SHEWANGIZAW, HAMELO |
| Advisors: | Prof.P.Singh |
| Keywords: | superconductor LaFeAsOixFx
crystal structur |
| Copyright: | Jun-2011 |
| Date Added: | 8-Dec-2012 |
| Publisher: | AAU |
| Abstract: | The discovery of new superconductor LaFeAsOixFx with a superconducting critical
temprature, Tc of 26K in 2008 has quickly renewed interest in the exploration of iron-
based superconductors. More new superconductors have been discovered with the highest
Tc of up to 55K being observed in the SmFeAsO1xFx compound. High Tc have previosly
only been observed in cuprates, these new iron based superconductors have been added
as second member of high Tc family. The crystal structur of these compound contains an
almoost 2D Fe-As layer formed by FeAS4 tetrahedrons,which can be separeted an ionic
layer that provides an extra electron to Fe-As layer superconductivity can be induced by
carrier doping,which destroy the antifrromagnetic ground state. The pairing mechanisim
has been clari ed as unconventional and antiferromagnetic(AF) spin
uctuations (SFs)
seem to play an important role in making these pairs. In this paper superconducting
crystal structur, physical properties of parent compounds, pressure e ects, the electronic
state of the compounds will be presented. |
| Description: | A Thesis Submitted to the School of Graduate Studies Addis Ababa University in Partial Ful_llment of the Requirement for the Degree of Master of Science in Physics |
| URI: | http://hdl.handle.net/123456789/4224 |
| Appears in: | Thesis - Physics
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