Two-dimensional Dirac fermions in thin films of Cd3As2
| Autor: | Luca Galletti, Omor F. Shoron, Susanne Stemmer, Timo Schumann, David A. Kealhofer, Honggyu Kim, Manik Goyal |
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| Rok vydání: | 2018 |
| Předmět: |
Physics
Condensed matter physics Dirac (software) 02 engineering and technology Electronic structure Landau quantization 021001 nanoscience & nanotechnology 01 natural sciences Semimetal Condensed Matter::Materials Science symbols.namesake Dirac fermion Electric field 0103 physical sciences Density of states State of matter symbols 010306 general physics 0210 nano-technology |
| Zdroj: | Physical Review B. 97 |
| ISSN: | 2469-9969 2469-9950 |
| DOI: | 10.1103/physrevb.97.115132 |
| Popis: | Three-dimensional topological Dirac semimetals are a new state of matter. The authors report on experiments that directly access the electronic structure of two-dimensional states in the prototype topological Dirac semimetal Cd${}_{3}$As${}_{2}$. By modulating the carrier density of very thin, epitaxial Cd${}_{3}$As${}_{2}$ films, using the electric field effect, the authors tune the electronic states through a two-dimensional Dirac point, as evidenced by a minimum in the density of states. Moreover, the linear energy dispersion and the presence of a zero-energy Landau level establish the topological nature of the two-dimensional states in this three-dimensional Dirac semimetal. |
| Databáze: | OpenAIRE |
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