Unit:
Κατεύθυνση Φυσική των Υλικών (ΒΑΣΙΚΗ ΦΥΣΙΚΗ)Library of the School of Science
Author:
Χατζηαποστόλου Αντώνιος
Supervisors info:
Ευστράτιος Μανουσάκης Καθηγητής (επιβλέπων),Γεώργιος Τριμπέρης Καθηγητής, Νικόλαος Στεφάνου Καθηγητής
Original Title:
Μελέτη της συνάρτησης Green μίας οπής σε αντισιδηρομαγνήτες με τάξη μορφής στήλης
Translated title:
Study of the single-hole Green's function in antiferromagnets with columnar order
Summary:
We study the Green's function of one hole in antiferromagnets with columnar
order for the t-J1-J2 model. The t-J1-J2 model is only a first step for further
investigation of electrons and holes dynamics in iron-pnictides FeAs. We use
linear spin-wave approximation (LSW) for the part of effective Hamiltonian
which describes spin interactions and slave-fernion method for the hole hopping
part. We calculate Dyson equation of one hole propagator using non-crossing
approximation (NCA). With NCA the effect of self-energy diagrams with magnon
propagators crossings is negligible.
Keywords:
Antiferromagnets, Iron-pnictides, Hole, Magnons, Self-energy
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