تقرير
Vernier Spectrum and Isospin State Control in Carbon Nanotube Quantum Dots
| العنوان: | Vernier Spectrum and Isospin State Control in Carbon Nanotube Quantum Dots |
|---|---|
| المؤلفون: | Berg, Jameson, Lotfizadeh, Neda, Nichols, Dublin, Senger, Mitchell J., De Gottardi, Wade, Minot, Ethan D., Deshpande, Vikram V. |
| سنة النشر: | 2023 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Mesoscale and Nanoscale Physics |
| الوصف: | Commensurability phenomena abound in nature and are typically associated with mismatched lengths, as can occur in quasiperiodic systems. However, not all commensuration effects are spatial in nature. In finite-sized Dirac systems, an intriguing example arises in tilted or warped Dirac cones wherein the degeneracy in the speed of right- and left-moving electrons within a given Dirac cone or valley is lifted. Bound states can be purely fast-moving or purely slow-moving, giving rise to incommensurate energy level spacings and a vernier spectrum. In this work, we present evidence for this vernier spectrum in Coulomb blockade measurements of ultraclean suspended carbon nanotube quantum dots. The addition-energy spectrum of the quantum dots reveals an energy-level structure that oscillates between aligned and misaligned energy levels. Our data suggest that the fast- and slow-moving bound states hybridize at certain gate voltages. Thus, gate-voltage tuning can select states with varying degrees of hybridization, suggesting numerous applications based on accessing this isospin-like degree of freedom. Comment: 14 pages including 3 figures |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2311.12332 |
| رقم الأكسشن: | edsarx.2311.12332 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |