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Magnetic properties of Fe-pnictides superconductors as a function of pressure and doping

Published online by Cambridge University Press:  20 July 2012

Gianni Profeta ,
Nicola Colonna  and
Alessandra Continenza
Gianni Profeta
Affiliation:
Dipartimento di Fisica Universita’ degli Studi dell’Aquila and CNR-Spin – Via Vetoio 10. 67100 L’Aquila (ITALY)
Nicola Colonna
Affiliation:
SISSA, via Bonomea, 265 - 34136 Trieste (ITALY)
Alessandra Continenza
Affiliation:
CNISM -Dipartimento di Fisica Università degli Studi dell’Aquila Via Vetoio 10 - 67100 L’Aquila (ITALY)
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Abstract

We present a first principles study of the electronic and magnetic properties of Fe-based pnicitdes superconductors as a function of pressure and doping. We show that the magnetic phase and a local magnetic moment persists at doping level quite larger than what found in experiments and the pressure phase diagram consists of a paramagnetic, antiferromagnetic and non-magnetic phases.

Although this result calls for the inclusion of long-wavelength or local fluctuations of iron magnetic moment and non-hydrostatic pressure effects, in order to improve the theoretical description of real experimental conditions, recent photoemission experiments[1] reconcile these DFT results, showing a local magnetic moment on Fe site different from zero in the paramagnetic, antiferromagnetic and the superconducting phase.

Keywords

superconductingstructuralmagnetic properties
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1434: Symposium I – Recent Advances in Superconductors, Novel Compounds and High-Tc Materials , 2013 , mrss12-1434-i10-03
Copyright
Copyright © Materials Research Society 2012

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References

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