Magnetically Stabilized Luminescent Excitations in Hexagonal Boron Nitride

Details Magnetically Stabilized Luminescent Excitations in Hexagonal Boron Nitride Magnetically Stabilized Luminescent Excitations in Hexagonal Boron Nitride

2001-03-13

arxiv.org/abs/cond-mat/0103281v1

Physics

Condensed Matter

11 pages, 7 figures, to appear in the Journal of Luminescence

Scientific paper

10.1016/S0022-2313(01)00166-1

Magnetically stabilized luminescence is observed in hexagonal boron nitride. The luminescence is induced by absorption of cold neutrons and is in the visible region. In the absence of a magnetic field, the photon emission level is observed to decay over several hundred seconds. A fraction of this luminescence can be suppressed if the temperature is T <~ 0.6 K and the magnetic field is B >~ 1.0 T. Subsequent to irradiation and suppression, luminescence can be induced by an increase in T or lowering of B. Possible explanations include stabilization of triplet states or the localization and stabilization of excitons.

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