As vacancies as magnetic defects in iron pnictide superconductors

Speaker
Konstantin Kikoin, TAU
Date
10/01/2013 - 15:30 - 14:00Add to Calendar 2013-01-10 14:00:00 2013-01-10 15:30:00 As vacancies as magnetic defects in iron pnictide superconductors Unusual magnetic response of As-deficient iron pnictide LaOFeAs is   discussed. It is shown that As vacancies being nominally non-magnetic   defects induce strong enhancement of paramagnetic response of   nonstoichiometric 1111 iron pnictides. This strong magnetic response   however is not detrimental for superconductivity. The microscopic   theory explaining unconventional properties of defects in Fe-As planes is based on a generalized Anderson - Wolff   impurity model adapted for multivalley semimetals. Resnick bld, seminar room המחלקה לפיזיקה physics.dept@mail.biu.ac.il Asia/Jerusalem public
Place
Resnick bld, seminar room
Abstract

Unusual magnetic response of As-deficient iron pnictide LaOFeAs is  
discussed. It is shown that As vacancies being nominally non-magnetic  
defects induce strong enhancement of paramagnetic response of  
nonstoichiometric 1111 iron pnictides. This strong magnetic response  
however is not detrimental for superconductivity. The microscopic  
theory explaining unconventional properties
of defects in Fe-As planes is based on a generalized Anderson - Wolff  
impurity model adapted for multivalley semimetals.

תאריך עדכון אחרון : 02/01/2013