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arXiv · 1305.2366

Observation of conduction electron spin resonance in boron doped diamond

Péter Szirmai·Gábor Fábián·János Koltai·Bálint Náfrádi·László Forró·Thomas Pichler·Oliver A. Williams·Soumen Mandal·Christopher Bäuerle·Ferenc Simon
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Abstract

We observe the electron spin resonance of conduction electrons in boron doped (6400 ppm) superconducting diamond (Tc =3.8 K). We clearly identify the benchmarks of conduction electron spin resonance (CESR): the nearly temperature independent ESR signal intensity and its magnitude which is in good agreement with that expected from the density of states through the Pauli spin-susceptibility. The temperature dependent CESR linewidth weakly increases with increasing temperature which can be understood in the framework of the Elliott-Yafet theory of spin-relaxation. An anomalous and yet unexplained relation is observed between the g-factor, CESR linewidth, and the resistivity using the empirical Elliott-Yafet relation.

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Péter Szirmai, Gábor Fábián, János Koltai, Bálint Náfrádi, László Forró, Thomas Pichler, Oliver A. Williams, Soumen Mandal, Christopher Bäuerle, Ferenc Simon. 2013-05-10. Observation of conduction electron spin resonance in boron doped diamond. https://doi.org/10.1103/physrevb.87.195132

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