知り合いのフランスの物理研究室でポスドクを募集しています。
場所：パリ１１大学。
分野：固体物理、ナノ・メゾスコピック物理、実験。
期間：１年。
フランス語は話せなくても英語で勤務可能なら大丈夫です。専門分野での知識、特にクリーン・ルームでのテクニカルなノウハウをすでにお持ちの方を探しています。興味のある方は下記のBouchiat教授にじかにコンタクトを取られるか、私にメッセージを送って下さい。
Probing coherent transport in suspended carbon-based molecules.
Proximity induced superconductivity constitutes a powerful tool for the investigation of coherent transport through a normal conductor connected to
superconducting electrodes. The conversion of Cooper pairs into Andreev pairs in the normal region is a very sensitive probe of phase breaking events such as spin flip or electron phonon scattering. Experiments are
developed along these lines in our mesoscopic physics team in Orsay on various systems such as carbon nanotubes, metallo fullerenes and more recently on graphene. By exploring transport through metallo-fullerenes trapped between suspended superconducting electrodes, we have shown that coherent transfer of Cooper pairs can reveal the magnetic state of the molecules. For long molecules proximity induced superconductivity appears when both thermal length and phase coherence length are of the order of the length of
the molecules. In the case of carbon nanotubes suspended between superconducting contacts, it is possible to detect vibration bending modes with very high quality factor from the measurement of the Josephson current. We plan to continue these experiments on suspended nanotubes which combine a high Josephson supercurrent and an electrostatic gate. It is also planned to perform current phase relations on these devices. We also work on transport measurements on graphene foils connected to superconducting electrodes either on substrate either suspended: The low temperature differential resistance presents peaks at sub-multiple values of double the superconducting gap of the tungsten electrodes, a signature of multiple
Andreev reflections in the S/Graphene/S junction. On suspended graphene we expect to observe signatures of the phonon modes.
The candidate is expected to have skills in nanofabrication techniques as well as low temperature physics (dilution refrigerator).
Applications should be sent by email to:
Hélène Bouchiat and Richard Deblock
Hélène Bouchiat
Laboratoire de physique des solides
Bat 510
91405 Orsay
France
Tel 33169155314
FAX 6086
email bouchiat@lps.u-psud.fr
場所：パリ１１大学。
分野：固体物理、ナノ・メゾスコピック物理、実験。
期間：１年。
フランス語は話せなくても英語で勤務可能なら大丈夫です。専門分野での知識、特にクリーン・ルームでのテクニカルなノウハウをすでにお持ちの方を探しています。興味のある方は下記のBouchiat教授にじかにコンタクトを取られるか、私にメッセージを送って下さい。
Probing coherent transport in suspended carbon-based molecules.
Proximity induced superconductivity constitutes a powerful tool for the investigation of coherent transport through a normal conductor connected to
superconducting electrodes. The conversion of Cooper pairs into Andreev pairs in the normal region is a very sensitive probe of phase breaking events such as spin flip or electron phonon scattering. Experiments are
developed along these lines in our mesoscopic physics team in Orsay on various systems such as carbon nanotubes, metallo fullerenes and more recently on graphene. By exploring transport through metallo-fullerenes trapped between suspended superconducting electrodes, we have shown that coherent transfer of Cooper pairs can reveal the magnetic state of the molecules. For long molecules proximity induced superconductivity appears when both thermal length and phase coherence length are of the order of the length of
the molecules. In the case of carbon nanotubes suspended between superconducting contacts, it is possible to detect vibration bending modes with very high quality factor from the measurement of the Josephson current. We plan to continue these experiments on suspended nanotubes which combine a high Josephson supercurrent and an electrostatic gate. It is also planned to perform current phase relations on these devices. We also work on transport measurements on graphene foils connected to superconducting electrodes either on substrate either suspended: The low temperature differential resistance presents peaks at sub-multiple values of double the superconducting gap of the tungsten electrodes, a signature of multiple
Andreev reflections in the S/Graphene/S junction. On suspended graphene we expect to observe signatures of the phonon modes.
The candidate is expected to have skills in nanofabrication techniques as well as low temperature physics (dilution refrigerator).
Applications should be sent by email to:
Hélène Bouchiat and Richard Deblock
Hélène Bouchiat
Laboratoire de physique des solides
Bat 510
91405 Orsay
France
Tel 33169155314
FAX 6086
email bouchiat@lps.u-psud.fr
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