THEORETICAL INVESTIGATION OF THE COEXISTENCE OF SUPERCONDUCTIVITY AND ANTIFERROMAGNETISM IN CeP t and CeRhIn 5 SUPERCONDUCTORS 2 In 7

Tamiru, Negussie

dc.contributor.author	Tamiru, Negussie
dc.date.accessioned	2018-07-18T09:33:04Z
dc.date.available	2018-07-18T09:33:04Z
dc.date.issued	2018-07-18
dc.identifier.uri	http://hdl.handle.net/123456789/8895
dc.description.abstract	This work focuses on the theoretical investigation of the coexistence of Superconductivity and Antiferromagnetism in CeP t 2 In 7 and CeRhIn superconductors . By developing a model Hamiltonian for the systems and using double time temperature dependent Green 0 5 s function formalism, we obtained expressions for superconducting transition temperature (T ), superconducting order parameter(∆) and magnetic order parameter(η). By using some plausible values of the parameters, superconducting transition temperature (T c c ) versus magnetic order parameter(η) and Neel temperature (T )versus magnetic order parameter(η) phase diagrams are plotted which show the coexistence of superconductivity and antiferromagnetism in CeP t 2 In 7 and CeRhIn . The results we obtained are in agreement with experimental observations. Besides, by using the Ginzburg-Landau (GL) phenomenological equation, we found the direct relationship between the GL coherence length (ξ GL ) and penetration depth (λ ) with temperature. From the GL equations and the results obtained for the GL coherence length, the expressions for the upper critical magnetic ﬁelds (H c 2 GL )are obtained for the superconductors CeP t 2 In 7 and CeRhIn . The results are plotted as a function of temperature. The phase diagrams show the linear dependence of upper critical magnetic ﬁelds (H c 2 5 ) with temperature. Our ﬁndings are in agreement with experimental 5 N observations.	en_US
dc.language.iso	en_US	en_US
dc.subject	physics (PHD)	en_US
dc.title	THEORETICAL INVESTIGATION OF THE COEXISTENCE OF SUPERCONDUCTIVITY AND ANTIFERROMAGNETISM IN CeP t and CeRhIn 5 SUPERCONDUCTORS 2 In 7	en_US
dc.type	Thesis	en_US