CaB6: A new semiconducting material for spin electronics

H.J. Tromp; P. van Gelderen; Paul J. Kelly; G. Brocks; Peter A. Bobbert

doi:10.1103/PhysRevLett.87.016401

CaB6: A new semiconducting material for spin electronics

H.J. Tromp, P. van Gelderen, Paul J. Kelly, G. Brocks, Peter A. Bobbert

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Abstract

Ferromagnetism was recently observed at unexpectedly high temperatures in La-doped CaB6. The starting point of all theoretical proposals to explain this observation is a semimetallic electronic structure calculated for CaB6 within the local density approximation. Here we report the results of parameter-free quasiparticle calculations of the single-particle excitation spectrum which show that CaB6 is not a semimetal but a semiconductor with a band gap of 0.8±0.1 eV. Magnetism in LaxCa1-xB6 occurs just on the metallic side of a Mott transition in the La-induced impurity band.

Original language	English
Article number	016401
Pages (from-to)	-
Number of pages	4
Journal	Physical review letters
Volume	87
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevLett.87.016401
Publication status	Published - 2001

Keywords

METIS-128760
IR-61276

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1103/PhysRevLett.87.016401

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AU - Tromp, H.J.

AU - van Gelderen, P.

AU - Kelly, Paul J.

AU - Brocks, G.

AU - Bobbert, Peter A.

PY - 2001

Y1 - 2001

N2 - Ferromagnetism was recently observed at unexpectedly high temperatures in La-doped CaB6. The starting point of all theoretical proposals to explain this observation is a semimetallic electronic structure calculated for CaB6 within the local density approximation. Here we report the results of parameter-free quasiparticle calculations of the single-particle excitation spectrum which show that CaB6 is not a semimetal but a semiconductor with a band gap of 0.8±0.1 eV. Magnetism in LaxCa1-xB6 occurs just on the metallic side of a Mott transition in the La-induced impurity band.

AB - Ferromagnetism was recently observed at unexpectedly high temperatures in La-doped CaB6. The starting point of all theoretical proposals to explain this observation is a semimetallic electronic structure calculated for CaB6 within the local density approximation. Here we report the results of parameter-free quasiparticle calculations of the single-particle excitation spectrum which show that CaB6 is not a semimetal but a semiconductor with a band gap of 0.8±0.1 eV. Magnetism in LaxCa1-xB6 occurs just on the metallic side of a Mott transition in the La-induced impurity band.

KW - METIS-128760

KW - IR-61276

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SP - -

JO - Physical review letters

JF - Physical review letters

IS - 1

M1 - 016401

ER -

CaB6: A new semiconducting material for spin electronics

Abstract

Keywords

UN SDGs

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