We demonstrate that a consistent breakdown of the standard even-odd filling scheme in the Coulomb blockade regime can be easily obtained in a quantum dot containing two wells strongly coupled by a very transparent barrier. By exploiting a multi-gate configuration, we prove that a partial filling of nearly degenerate orbitals can be controlled electrostatically. Singlet-triplet spin transitions are demonstrated by low-temperature magneto-transport measurements.
Electrostatic spin control in multi-barrier nanowires
Rossella Francesco;Ercolani Daniele;Sorba Lucia;Beltram Fabio;Roddaro Stefano
2014
Abstract
We demonstrate that a consistent breakdown of the standard even-odd filling scheme in the Coulomb blockade regime can be easily obtained in a quantum dot containing two wells strongly coupled by a very transparent barrier. By exploiting a multi-gate configuration, we prove that a partial filling of nearly degenerate orbitals can be controlled electrostatically. Singlet-triplet spin transitions are demonstrated by low-temperature magneto-transport measurements.File in questo prodotto:
Non ci sono file associati a questo prodotto.
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.