Pauli-Spin-Blockade Transport through a Silicon Double Quantum Dot

Details Pauli-Spin-Blockade Transport through a Silicon Double Quantum Dot Pauli-Spin-Blockade Transport through a Silicon Double Quantum Dot

2007-07-24

arxiv.org/abs/0707.3513v2

Phys.Rev.B 77, 073310 (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

10 pages,3 figures

Scientific paper

10.1103/PhysRevB.77.073310

We present measurements of resonant tunneling through discrete energy levels of a silicon double quantum dot formed in a thin silicon-on-insulator layer. In the absence of piezoelectric phonon coupling, spontaneous phonon emission with deformation-potential coupling accounts for inelastic tunneling through the ground states of the two dots. Such transport measurements enable us to observe a Pauli spin blockade due to effective two-electron spin-triplet correlations, evident in a distinct bias-polarity dependence of resonant tunneling through the ground states. The blockade is lifted by the excited-state resonance by virtue of efficient phonon emission between the ground states. Our experiment demonstrates considerable potential for investigating silicon-based spin dynamics and spin-based quantum information processing.

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