Výsledky vyhledávání - "van der Caspar Wal"

Stabilizing nuclear spins around semiconductor electrons via the interplay of optical coherent population trapping and dynamic nuclear polarization

Autor: Danny O'Shea, Dirk Reuter, A. R. Onur, Andreas D. Wieck, van der Caspar Wal, de Jakko Jong

Publikováno v: Physical Review. B: Condensed Matter and Materials Physics, 93(16):161204. AMER PHYSICAL SOC

We experimentally demonstrate how coherent population trapping (CPT) for donor-bound electron spins in GaAs results in autonomous feedback that prepares stabilized states for the spin polarization of nuclei around the electrons. CPT was realized by e

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3556daa040e6c6151fadc712905c4b37
https://doi.org/10.1103/physrevb.93.161204

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Odd and even Kondo effects from emergent localization in quantum point contacts

Autor: E. J. Koop, van der Caspar Wal, Dirk Reuter, J. B. Dekker, Yigal Meir, Ramón Aguado, van der Jasper Velde, Roi Levy, J. P. de Jong, Andreas D. Wieck, Muhammad Javaid Iqbal

Publikováno v: Digital.CSIC. Repositorio Institucional del CSIC
instname
Nature, 501(7465), 79-+. Nature Publishing Group

El pdf del artículo es la versión pre-print: arXiv:1307.7167.-- et al.
A quantum point contact (QPC) is a basic nanometre-scale electronic device: a short and narrow transport channel between two electron reservoirs. In clean channels, electro

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c399ebaf2a66227093803ed8fe890409
http://hdl.handle.net/10261/95155

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Electromagnetically induced transparency with an ensemble of donor-bound electron spins in a semiconductor

Autor: Dirk Reuter, M. Sladkov, Morten P. Bakker, A. R. Onur, van der Caspar Wal, Andreas D. Wieck, A. U. Chaubal

Publikováno v: Physical Review. B: Condensed Matter and Materials Physics, 82(12):121308. AMER PHYSICAL SOC

We present measurements of electromagnetically induced transparency with an ensemble of donor- bound electrons in low-doped n-GaAs. We used optical transitions from the Zeeman-split electron spin states to a bound trion state in samples with optical

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c95613b94e230c3df430067b5de8f289
https://research.rug.nl/en/publications/4ef726cc-5ca4-4502-880d-3b818dac3f5a

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Electrical detection of spin pumping: dc voltage generated by ferromagnetic resonance at ferromagnet/nonmagnet contact

Autor: van der Caspar Wal, van Bart Wees, S. M. Watts, Marius V. Costache

Publikováno v: Physical Review. B: Condensed Matter and Materials Physics, 78(6):064423. AMER PHYSICAL SOC

We describe electrical detection of spin pumping in metallic nanostructures. In the spin pumping effect, a precessing ferromagnet attached to a normal-metal acts as a pump of spin-polarized current, giving rise to a spin accumulation. The resulting s

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f073101ea5dcc96878af07bb90a061c4
https://doi.org/10.1103/physrevb.78.064423

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Spin accumulation and spin relaxation in a large open quantum dot

Autor: Dirk Reuter, E. J. Koop, Andreas D. Wieck, van der Caspar Wal, van Bart Wees

Publikováno v: Physical Review Letters, 101(5):056602. AMER PHYSICAL SOC

We report electronic control and measurement of an imbalance between spin-up and spin-down electrons in micron-scale open quantum dots. Spin injection and detection was achieved with quantum point contacts tuned to have spin-selective transport, with

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::43bc18c0b11405af1c5645cc72e2e5eb
https://research.rug.nl/en/publications/ac8e7923-e34e-4b50-8e40-50bdb5ce697b

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Electrical Detection of Spin Pumping due to the Precessing Magnetization of a Single Ferromagnet

Autor: S. M. Watts, M. Sladkov, Marius V. Costache, van der Caspar Wal, van Bart Wees

Publikováno v: Physical Review Letters, 97(21):216603, art.-216603. AMER PHYSICAL SOC

We report direct electrical detection of spin pumping, using a lateral normal-metal/ferromagnet/normal-metal device, where a single ferromagnet in ferromagnetic resonance pumps spin-polarized electrons into the normal metal, resulting in spin accumul

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d1fe6f4a15191e9413f6f282231c40f0
https://doi.org/10.1103/physrevlett.97.216603

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Quantum superposition of charge states on capacitively coupled superconducting islands

Autor: C. P. Heij, D.C. Dixon, van der Caspar Wal, Peter Hadley, J. E. Mooij

Publikováno v: Physical Review B, 67(14). AMER PHYSICAL SOC
TU Graz
Physical Review B-Condensed Matter and Materials Physics, 67
Scopus-Elsevier

We investigate the ground state properties of a system containing two superconducting islands coupled capacitively by a wire. The ground state is a macroscopic superposition of charge states, even though the islands cannot exchange charge carriers. T

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::23ce2a41d0d7c5ba17f69d6ed49fb2e1
https://research.rug.nl/en/publications/13b505f4-50c5-4ff3-9b89-f4eabf494d8e

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Engineering decoherence in Josephson persistent-current qubits

Autor: Frank K. Wilhelm, J.E. Mooij, van der Caspar Wal, C.J.P.M. Harmans

Publikováno v: University of Groningen

We discuss the relaxation and dephasing rates that result from the control and the measurement setup itself in experiments on Josephson persistent-current qubits. For control and measurement of the qubit state, the qubit is inductively coupled to ele

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1a9474e632ba2b599fc23c5676235f97
https://research.rug.nl/en/publications/7acade7c-259f-43c3-9dc7-9ad2f17b0df7

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