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Event
- Title:
- Sergio Caprara Lecture (part III)
- When:
-
22.11.2011 - 22.11.2011 16.00 h - 18.00 h
- Where:
-
Sala Touschek -
Roma
- Category:
-
Seminars
Description
Spin-polarized half-metallic state of a ferromagnetic delta layer embedded in a semiconducting matrix
I discuss a model to describe the occurrence of a spin-polarized half-metallic state around a delta layer of magnetic transition metal atoms embedded into a non-magnetic semiconducting matrix. The intrinsic physical properties of a single delta
layer are responsible for ferromagnetic order in this system. The relevant physical ingredients of the model are the hybridization of the d electron states of the transition metal with the (s,p) electron states of the semiconductor, the charge redistribution around the delta layer, and the electron-electron correlation on the d orbitals of the transition metal atoms, which is the driving
force of ferromagnetism. The seminar is preceded by a tutorial introduction to the formalism of second quantization for Fermi systems.
Venue
- Venue:
-
Sala Touschek
-
Website
- Street:
-
Piazzale Aldo Moro, 2
- ZIP:
-
00185
- City:
-
Roma
- State:
-
Italy
- Country:
-
Description
Università La Sapienza. Edificio Marconi, 2nd floor
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