We report the design and development of a piezoelectric sample rotation system, and its integration into an Oxford Instruments Kelvinox 100 dilution refrigerator, for orientation-dependent studies of quantum transport in semiconductor nanodevices at millikelvin temperatures in magnetic fields up to 10 T. Our apparatus allows for continuous in situ rotation of a device through in two possible configurations. The first enables rotation of the field within the plane of the device, and the second allows the field to be rotated from in-plane to perpendicular to the device plane. An integrated angle sensor coupled with a closed-loop feedback system allows the device orientation to be known to within ±0.03° while maintaining the sample temperature below 100 mK.
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The LCC20 packages were ordered from Spectrum Semiconductor Materials, Inc. The part number is LCC02034 and the manufacturer’s drawing number is IRK20F1-5856B.
25.
Attocube Systems AG, rotator type: ANRv51/LT/UHV/RES.
26.
See http://www.marylandplasticprdts.com/castepoxy.html for MPC 4264 amber, an unfilled, anhydride cured, cast epoxy resin made by Maryland Plastic Products.
27.
Two separate pieces were ordered from Cambridge Magnetic Refrigeration: CMR mP-body 12CU-LF24, part no. 02-26-029 without the copper loom, and CMR mP-clamp, part no. 02-26-027 and assembled to form the whole sample holder.
28.
Ordered from the CMRdirect
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LEMO S.A., Nonmetallic connector part numbers used are EGG.1B.308.ZLL and FGG.1B.308.ZLA.
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Lake Shore Cryotronics, Inc., Cryogenic Cable Type: CryoCable™ Type: CYRC (
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33.
These 2DEG devices were fabricated from the A2899 wafer grown by Cambridge.
© 2010 American Institute of Physics.
2010
American Institute of Physics
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