Carrier mobilities of (001) cadmium arsenide films
We investigate (001)-oriented films of the topological semimetal cadmium arsenide (Cd3As2) grown by molecular beam epitaxy on lattice-matched III–V AlxIn1−xSb buffer layers. Magnetotransport studies and analysis of thin film microstructures are used to determine the influence of dislocations on thei...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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AIP Publishing LLC
2020-05-01
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| Series: | APL Materials |
| Online Access: | http://dx.doi.org/10.1063/5.0002771 |
| _version_ | 1818148822386212864 |
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| author | Manik Goyal Salva Salmani-Rezaie Tyler N. Pardue Binghao Guo David A. Kealhofer Susanne Stemmer |
| author_facet | Manik Goyal Salva Salmani-Rezaie Tyler N. Pardue Binghao Guo David A. Kealhofer Susanne Stemmer |
| author_sort | Manik Goyal |
| collection | DOAJ |
| description | We investigate (001)-oriented films of the topological semimetal cadmium arsenide (Cd3As2) grown by molecular beam epitaxy on lattice-matched III–V AlxIn1−xSb buffer layers. Magnetotransport studies and analysis of thin film microstructures are used to determine the influence of dislocations on their carrier mobilities. We show that only a minority of the threading dislocations present in the buffer layers extend into the Cd3As2 films. Threading dislocations are shown to reduce the mobilities of carriers residing in the topological surface states, while bulk transport was unaffected by a change in the dislocation density across an order of magnitude. Thick (001) Cd3As2 films exhibit electron mobilities of up to 41 000 cm2 V−1 s−1 at 2 K. The results provide insights into the influence of extended defects on the transport properties of a prototype topological semimetal. |
| first_indexed | 2024-12-11T12:57:15Z |
| format | Article |
| id | doaj.art-91c694bad21b4a77b9a786f8fe822b6c |
| institution | Directory Open Access Journal |
| issn | 2166-532X |
| language | English |
| last_indexed | 2024-12-11T12:57:15Z |
| publishDate | 2020-05-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | APL Materials |
| spelling | doaj.art-91c694bad21b4a77b9a786f8fe822b6c2022-12-22T01:06:32ZengAIP Publishing LLCAPL Materials2166-532X2020-05-0185051106051106-610.1063/5.0002771Carrier mobilities of (001) cadmium arsenide filmsManik Goyal0Salva Salmani-Rezaie1Tyler N. Pardue2Binghao Guo3David A. Kealhofer4Susanne Stemmer5Materials Department, University of California, Santa Barbara, California 93106-5050, USAMaterials Department, University of California, Santa Barbara, California 93106-5050, USAMaterials Department, University of California, Santa Barbara, California 93106-5050, USAMaterials Department, University of California, Santa Barbara, California 93106-5050, USAMaterials Department, University of California, Santa Barbara, California 93106-5050, USAMaterials Department, University of California, Santa Barbara, California 93106-5050, USAWe investigate (001)-oriented films of the topological semimetal cadmium arsenide (Cd3As2) grown by molecular beam epitaxy on lattice-matched III–V AlxIn1−xSb buffer layers. Magnetotransport studies and analysis of thin film microstructures are used to determine the influence of dislocations on their carrier mobilities. We show that only a minority of the threading dislocations present in the buffer layers extend into the Cd3As2 films. Threading dislocations are shown to reduce the mobilities of carriers residing in the topological surface states, while bulk transport was unaffected by a change in the dislocation density across an order of magnitude. Thick (001) Cd3As2 films exhibit electron mobilities of up to 41 000 cm2 V−1 s−1 at 2 K. The results provide insights into the influence of extended defects on the transport properties of a prototype topological semimetal.http://dx.doi.org/10.1063/5.0002771 |
| spellingShingle | Manik Goyal Salva Salmani-Rezaie Tyler N. Pardue Binghao Guo David A. Kealhofer Susanne Stemmer Carrier mobilities of (001) cadmium arsenide films APL Materials |
| title | Carrier mobilities of (001) cadmium arsenide films |
| title_full | Carrier mobilities of (001) cadmium arsenide films |
| title_fullStr | Carrier mobilities of (001) cadmium arsenide films |
| title_full_unstemmed | Carrier mobilities of (001) cadmium arsenide films |
| title_short | Carrier mobilities of (001) cadmium arsenide films |
| title_sort | carrier mobilities of 001 cadmium arsenide films |
| url | http://dx.doi.org/10.1063/5.0002771 |
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