Valley polarization braiding in strained graphene
| Autor: | Nancy Sandler, Daiara Faria, Andrea Latge, Leandro R. F. Lima, Carlos León |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Physics
Local density of states Condensed Matter - Mesoscale and Nanoscale Physics Condensed matter physics Graphene FOS: Physical sciences 02 engineering and technology Quantum Hall effect Condensed Matter::Mesoscopic Systems and Quantum Hall Effect 021001 nanoscience & nanotechnology Polarization (waves) 01 natural sciences law.invention law Mesoscale and Nanoscale Physics (cond-mat.mes-hall) 0103 physical sciences Braid 010306 general physics 0210 nano-technology |
| Zdroj: | Physical Review B. 101 |
| ISSN: | 2469-9969 2469-9950 |
| DOI: | 10.1103/physrevb.101.081410 |
| Popis: | Previous works on deformed graphene predict the existence of valley-polarized states, however, optimal conditions for their detection remain challenging. We show that in the quantum Hall regime, edgelike states in strained regions can be isolated in energy within Landau gaps. We identify precise conditions for conducting edgelike states to be valley polarized. By the appropriate design of strain profiles these states can be positioned at chosen locations in the sample. A map of the local density of states as a function of energy and position reveals a unique braid pattern that serves as a fingerprint to identify valley polarization. |
| Databáze: | OpenAIRE |
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