Paper Highlighted in PRB
On November 21st, Physical Review B published our paper, Measurement of statistical nuclear spin polarization in a nanoscale GaAs sample. The publication was selected as an Editors’ Suggestion and appears in the Semiconductors II: surfaces, interfaces, microstructures, and related topics section of the journal. Editors’ Suggestions are described as a small number of papers “that the editors and referees find of particular interest, importance, or clarity”.
Joachim Nagel Visits
On Thursday and Friday November 10th and 11th Joachim Nagel visited our group. Joachim is a Ph.D. student in the solid-state physics group led by Prof. Reinhold Kleiner and Prof. Dieter Kölle at the Universität Tübingen. With his visit, we intend to start planning for an experimental collaboration between our two groups. On our side, the project will be led by Ph.D. student Arne Buchter. Joachim also gave a short talk to our group on his recent work.
First Swiss MRFM Gathering
On Friday November 4th the group participated in the first informal gathering of research groups working on magnetic resonance force microscopy (MRFM) here in Switzerland. The meeting was held at ETH Zürich and organized by Prof. Christian Degen. Prof. Degen, Prof. Poggio, Prof. Beat Meier, most members of Prof. Degen’s and Prof. Poggio’s groups, and the two members of Prof. Beat Meier’s group working on MRFM were in attendance. The proceedings included several talks on the latest developments, lab tours, and dinner. We look forward to collaborating with our colleages and to future events. Special thanks to Prof. Degen for organizing an excellent event.
Statistical Polarization in GaAs
A pre-print of our paper, Measurement of statistical nuclear spin polarization in a nanoscale GaAs sample, is now available on the arXiv. The report describes measurements of statistical polarizations of the quadrupolar nuclear spins contained in a sub-micrometer particle of GaAs. Measurements are carried out on ensembles containing less than 5 x 108 nuclear spins and occupying a volume of around (300 nm)3 with reduced volumes possible in future experiments. We discuss how further reduction of this detection volume will bring the quadrupolar spin ensemble into a regime where random spin fluctuations, rather than Botlzmann polarization, dominate its dynamics. The detection of statistical polarization in GaAs by magnetic resonance force microscopy (MRFM) represents an important first step toward 3D magnetic resonance imaging of III-V materials on the nanometer-scale. The paper will appear in Physical Review B.