Hole to Electron Crossover in a (Cd,Mn)Te Quantum Well through Surface Metallization
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arXiv
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| Main Authors: | , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866908693798322176 |
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| author | Dydniański, Amadeusz Raczyński, Mateusz Łopion, Aleksandra Kazimierczuk, Tomasz Kasprzak, Jacek Połczyńska, Karolina Ewa Pacuski, Wojciech Kossacki, Piotr |
| author_facet | Dydniański, Amadeusz Raczyński, Mateusz Łopion, Aleksandra Kazimierczuk, Tomasz Kasprzak, Jacek Połczyńska, Karolina Ewa Pacuski, Wojciech Kossacki, Piotr |
| contents | In this work we look into how the contact material influences the local charge properties of a p-type CdTe-based quantum well. We study five metals deposited as 10 nm layers on the sample surface: Au, Ag, Cr, Ni and Ti. We use magneto-spectroscopy to discriminate their charge states through monitoring the Zeeman shifts at singlet-triplet transitions. Most tested metals retain the original p-type of the QW, while gold and nickel coverage flips the local doping to n-type. This is attributed to a robust bonding of these two metals to the semiconductor, efficiently passivating its surface and thus improving electron diffusion from the metal to the quantum well. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_04631 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Hole to Electron Crossover in a (Cd,Mn)Te Quantum Well through Surface Metallization Dydniański, Amadeusz Raczyński, Mateusz Łopion, Aleksandra Kazimierczuk, Tomasz Kasprzak, Jacek Połczyńska, Karolina Ewa Pacuski, Wojciech Kossacki, Piotr Mesoscale and Nanoscale Physics In this work we look into how the contact material influences the local charge properties of a p-type CdTe-based quantum well. We study five metals deposited as 10 nm layers on the sample surface: Au, Ag, Cr, Ni and Ti. We use magneto-spectroscopy to discriminate their charge states through monitoring the Zeeman shifts at singlet-triplet transitions. Most tested metals retain the original p-type of the QW, while gold and nickel coverage flips the local doping to n-type. This is attributed to a robust bonding of these two metals to the semiconductor, efficiently passivating its surface and thus improving electron diffusion from the metal to the quantum well. |
| title | Hole to Electron Crossover in a (Cd,Mn)Te Quantum Well through Surface Metallization |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2512.04631 |