Microwave band on-chip coil technique for single electron spin resonance in a quantum dot

Obata, T.; Pioro‐Ladrière, Michel; Kubo, T.; Yoshida, Kazushi; Tokura, Y.; Tarucha, Seigo

doi:10.1063/1.2799735

Cited by 18 publications

(15 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Using this result, we estimate B a.c. to be 1 mT at the onset of saturation. Remarkably, such a magnitude is obtained for microwave power 500 times smaller than for magnetically driven ESR with an on-chip coil 5,12 . By operating deeper in the Coulomb-blockade region of the stability diagram, fields as strong as 10 mT are possible because stronger PAT is required to lift the spin blockade, yielding a spin-flip time as fast as 20 ns.…”

mentioning

confidence: 95%

“…However, producing strong and localized oscillating magnetic fields, which is a necessary step for addressing individual spins, is technically demanding. It involves on-chip coils 5,12 , relatively bulky to couple with a single spin, dissipating a significant amount of heat close to the electrons, whose temperature must not exceed a few decikelvins. In comparison, strong and local electric fields can be generated by simply exciting a tiny gate electrode nearby the target spin with low-level voltages.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Electrically driven single-electron spin resonance in a slanting Zeeman field

et al. 2008

View full text Add to dashboard Cite

The rapid rise of spintronics and quantum information science has led to a strong interest in developing the ability to coherently manipulate electron spins 1 . Electron spin resonance 2 is a powerful technique for manipulating spins that is commonly achieved by applying an oscillating magnetic field. However, the technique has proven very challenging when addressing individual spins 3-5 . In contrast, by mixing the spin and charge degrees of freedom in a controlled way through engineered non-uniform magnetic fields, electron spin can be manipulated electrically without the need of high-frequency magnetic fields 6,7 . Here we report experiments in which electrically driven addressable spin rotations on two individual electrons were realized by integrating a micrometre-size ferromagnet into a double-quantum-dot device. We find that it is the stray magnetic field of the micromagnet that enables the electrical control and spin selectivity. The results suggest that our approach can be tailored to multidot architecture and therefore could open an avenue towards manipulating electron spins electrically in a scalable way.Magnetic resonance was recently used to coherently manipulate the spin of a single electron 5 in a semiconductor structure, called a quantum dot 8,9 , whose tally of electrons can be tuned one by one, down to a single charge 10,11 . However, producing strong and localized oscillating magnetic fields, which is a necessary step for addressing individual spins, is technically demanding. It involves on-chip coils 5,12 , relatively bulky to couple with a single spin, dissipating a significant amount of heat close to the electrons, whose temperature must not exceed a few decikelvins. In comparison, strong and local electric fields can be generated by simply exciting a tiny gate electrode nearby the target spin with low-level voltages. For scalability purposes, it is therefore highly desirable to manipulate electron spins with electric fields instead of magnetic fields.To benefit from the advantages of electrical excitation, a mediating mechanism must be in place to couple the electric field to the electron spin, which usually responds only to magnetic fields. Spin-orbit coupling 13,14 , hyperfine interaction 15 and g-factor modulation 16 work as the mediating mechanism, which attract interest for their physical origins but necessitate refinement in terms of both manipulation speed and scalability. Instead, we controllably mix the spin and charge degrees of freedom in a magnetic-field gradient 6 , very much like the Stern-Gerlach effect 17 . This allows for greater flexibility, because the method is applicable to any semiconductor material. In addition, the magnetic field profile can be engineered to enable the selective manipulation of several spins using a single electrode.Thereby, we demonstrate addressable voltage-driven singlespin electron spin resonance (ESR) in a magnetic-field gradient. Two electrons are confined and spatially separated from each other in a gate-defined double quantum dot 18 (Fig. 1a)...

show abstract

mentioning

confidence: 95%

mentioning

confidence: 99%

Electrically driven single-electron spin resonance in a slanting Zeeman field

et al. 2008

View full text Add to dashboard Cite

show abstract

“…1,2 The conversion efficiency further improves if the microcoils are tuned and matched to the impedance of the feed line. [3][4][5][6] At higher frequencies ͑Q to W band͒, loop-gap resonators with a loop size of a few hundred micrometers are better suited. [7][8][9] The above mentioned noncavity structures have been found useful in single spin experiments if they are combined with alternative detection techniques, such as magnetic resonance force microscopy, 10 optical detection, 11 or electrical detection of the tunneling current.…”

Section: Scaling Of Sensitivity and Efficiency In Planar Microresonatmentioning

confidence: 99%

Scaling of sensitivity and efficiency in planar microresonators for electron spin resonance

Narkowicz

Suter

Niemeyer

2008

Review of Scientific Instruments

View full text Add to dashboard Cite

Electron spin resonance (ESR) of volume-limited samples or nanostructured materials can be made significantly more efficient by using microresonators whose size matches that of the structures under investigation. We describe a series of planar microresonators that show large improvements over conventional ESR resonators in terms of microwave conversion efficiency (microwave field strength for a given input power) and sensitivity (minimum number of detectable spins). We explore the dependence of these parameters on the size of the resonator and find that both scale almost linearly with the inverse of the resonator size. Scaling down the loops of the planar microresonators from 500 down to 20 mum improves the microwave efficiency and the sensitivity of these structures by more than an order of magnitude and reduces the microwave power requirements by more than two orders of magnitude.

show abstract

“…Investigation and control of microwave irradiated nanostructures should lead to an improvement of nanodevices architecture. 15 Here we report on two major effects involving the coupling of a microwave field with * Author to whom correspondence should be addressed. a nanostructure connected to an external dc source by metal leads.…”

Section: Introductionmentioning

confidence: 99%

Microwave Effects in Silicon Low Dimensional Nanostructures

Prati¹,

Latempa²,

Fanciulli³

2010

J. Nanosci. Nanotech.

View full text Add to dashboard Cite

We review the effects of microwave irradiation on low dimensional electron systems in Silicon nanostructures. Depending on the temperature and the energy scales involved, different effects may be observed on the transition probabilities of elastic and inelastic processes. In particular two cases of 0 dimensional confinement are analyzed, i.e., the trapping of a single electron in point defects close to a two dimensional electron system, and in single donor atoms trapped in the channel of a nanoMOSFET. Microwave dependent capture and emission phenomena and photon assisted tunneling are described in such kind of systems. Consequences on the single spin resonance detection and on the spin manipulation are discussed.

show abstract

Microwave band on-chip coil technique for single electron spin resonance in a quantum dot

Cited by 18 publications

References 23 publications

Electrically driven single-electron spin resonance in a slanting Zeeman field

Electrically driven single-electron spin resonance in a slanting Zeeman field

Scaling of sensitivity and efficiency in planar microresonators for electron spin resonance

Microwave Effects in Silicon Low Dimensional Nanostructures

Contact Info

Product

Resources

About