Hyperfine-induced hysteretic funnel structure in spin blockaded tunneling current of coupled vertical quantum dots at low magnetic field

Autor:	G. Yu, C. Payette, Michael Hilke, W. A. Coish, James A. Gupta, A. Wicha, Benjamin Harack, A. Leary, D. G. Austing
Rok vydání:	2013
Předmět:	Physics Condensed matter physics Biasing Electron Polarization (waves) Quantum dot devices Leakage currents High voltage Magnetic field Tunnel effect Direct current transmission Quantum dot Magnetic fields Polarization Electric potential Hyperfine structure
Zdroj:	AIP Conference Proceedings.
ISSN:	0094-243X
DOI:	10.1063/1.4848357
Popis:	We outline the properties of the hyperfine-induced funnel structure observed in the two-electron spin blockade region of a weakly coupled vertical double quantum dot device. Hysteretic steps in the leakage current occur due to dynamic nuclear polarization when either the bias voltage or the magnetic field is swept up and down. When the bias voltage is swept, an intriguing ∼3 mT wide cusp near 0 T appears in the down-sweep position, and when the magnetic field is swept, the current at 0 T can be switched from "low" to "high" as the bias is increased. 31st International Conference on the Physics of Semiconductors 2012, 29 July–3 August 2012, Zurich, Switzerland
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b730273b611921013f740568e99be739 https://doi.org/10.1063/1.4848357 Zobrazit plný text záznamu