Report
EPR study of nano-structured graphite
| العنوان: | EPR study of nano-structured graphite |
|---|---|
| المؤلفون: | Kausteklis, Jonas, Cevc, Pavel, Arcon, Denis, Nasi, Lucia, Pontiroli, Daniele, Mazzani, Marcello, Ricco, Mauro |
| سنة النشر: | 2011 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Strongly Correlated Electrons |
| الوصف: | We report on a systematic temperature dependent X-band electron paramagnetic resonance (EPR) study of nano-sized graphite particles prepared by ball-milling. In as-prepared samples a very intense and sharp EPR resonance at $g=2.0035$ has been measured. The EPR linewidth shows a Korringa-like linear temperature dependence arising due to the coexistence and strong exchange coupling of itinerant and localized edge states. With a prolonged aging in inert atmosphere changes in the EPR signal suggest gradual structural reconstruction where the localized edge-states dominate the EPR signal. In this case the EPR spin susceptibility shows a maximum at $\approx 23\, {\rm K}$ indicating the development of antiferromagnetic correlations as expected for the graphene lattice with a bipartite symmetry. Comment: 6 pages, 5 figures; accepted in Phys. Rev. B as regular article |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/1108.4259 |
| رقم الانضمام: | edsarx.1108.4259 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |