| Download | - View final version: Spin-orbit enabled quantum transport channels in a two-hole double quantum dot (PDF, 5.6 MiB)
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| DOI | Resolve DOI: https://doi.org/10.1103/PhysRevB.103.235310 |
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| Author | Search for: Bogan, Alex1; Search for: Studenikin, Sergei1; Search for: Korkusinski, Marek1ORCID identifier: https://orcid.org/0000-0002-2238-336X; Search for: Gaudreau, Louis1; Search for: Phoenix, Jason1; Search for: Zawadzki, Piotr1; Search for: Sachrajda, Andy1; Search for: Tracy, Lisa; Search for: Reno, John; Search for: Hargett, Terry |
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| Affiliation | - National Research Council of Canada. Security and Disruptive Technologies
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| Funder | Search for: Natural Sciences and Engineering Research Council of Canada; Search for: U.S. Department of Energy; Search for: Basic Energy Sciences |
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| Format | Text, Article |
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| Subject | magnetotransport; quantum transport; double quantum dots; III-V semiconductors; Hubbard model; Luttinger-Kohn model; quantum master equation; resistivity measurements |
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| Abstract | We analyze experimentally and theoretically the transport spectra of a gated lateral GaAs double quantum dot containing two holes. The strong spin-orbit interaction present in the hole subband lifts the Pauli spin blockade and allows to map out the complete spectra of the two-hole system. By performing measurements in both source-drain voltage directions, at different detunings and magnetic fields, we carry out quantitative fitting to a Hubbard two-site model accounting for the tunnel coupling to the leads and the spin-flip relaxation process. We extract the singlet-triplet gap and the magnetic field corresponding to the singlet-triplet transition in the double-hole ground state. Additionally, at the singlet-triplet transition we find a resonant enhancement (in the blockaded direction) and suppression of current (in the conduction direction). The current enhancement stems from the multiple resonance of two-hole levels, opening several conduction channels at once. The current suppression arises from the quantum interference of spin-conserving and spin-flipping tunneling processes. |
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| Publication date | 2021-06-14 |
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| Publisher | American Physical Society (APS) |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 1456a840-bdb5-4538-ba4e-7754ab50d0da |
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| Record created | 2022-04-06 |
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| Record modified | 2022-04-06 |
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