Volume 84, Number 2, October 2008
|Number of page(s)||5|
|Published online||14 October 2008|
Ultra long spin coherence time for Fe3+ in ZnO: A new spin qubit
Hahn-Meitner-Institut Berlin, Abt. Silizium-Photovoltaik - Kekuléstr. 5, 12489 Berlin, Germany, EU
Corresponding author: firstname.lastname@example.org
Accepted: 8 September 2008
We show by means of two pulse electron spin echo experiments on Fe3+ transition metal ions in natural ZnO that their spins S = have a spin coherence time limited at T = 6 K first by instantaneous diffusion (≈ 150 μs), then by nuclear spectral diffusion (≈ 450 μs) and ultimately by spin-lattice processes (≈ 1.4 ms). We predict a spin coherence time in the millisecond range for such a spin qubit in isotopically and chemically purified ZnO. The spin state of a single Fe3+ spin qubit could be readout by optical methods and it could be coherently manipulated using pulsed electron spin resonance (ESR) methods. A free carrier electrically gated between two nearby Fe3+ ions could efficiently couple two Fe3+ spin qubits. All those elements suggest the high potential of the Fe3+ spin qubits in ZnO for the implementation of a scalable ESR quantum computer.
PACS: 03.67.Lx – Quantum computation architectures and implementations / 76.30.-v – Electron paramagnetic resonance and relaxation / 76.30.Fc – Iron group (3d) ions and impurities (Ti-Cu)
© EPLA, 2008
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