تقرير
Anomalous Seebeck effect and counter-propagating ballistic currents in graphene
| العنوان: | Anomalous Seebeck effect and counter-propagating ballistic currents in graphene |
|---|---|
| المؤلفون: | Kavokin, A. V., Kavokina, S. V., Varlamov, A. A., Yerin, Yuriy |
| سنة النشر: | 2024 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Mesoscale and Nanoscale Physics, Condensed Matter - Strongly Correlated Electrons |
| الوصف: | The Seebeck effect consists in the induction of a voltage drop due to the temperature difference in a conductor. In the middle of XIXth century, Lord Kelvin has proposed a relation between the Seebeck coefficient and the derivative of the chemical potential over temperature in the broken circuit regime. This relation appears to be nearly universal as it equally well applies to metals, semimetals and semiconductors. We show that it may fail, however, in graphene, due to the non-locality effects in the ballistic electronic transport regime. The correction to the Kelvin's formula emerges due to the coexistence of counter-propagating non-dissipative currents of cold and hot electrons. The external magnetic field normal to the graphene sample allows separating hot and cold currents in real space. The developed formalism may help interpreting the recent experimental data on ballistic edge currents in graphene bi-layers in the quantum Hall regime [1]. Comment: 6 pages, 3 figures. Any comments are welcome |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2405.10807 |
| رقم الأكسشن: | edsarx.2405.10807 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |