Piezoelectric rotator for studying quantum effects in semiconductor nanostructures at high magnetic fields and low temperatures.
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 >100° 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.
School of Physics, University of New South Wales, Sydney, New South Wales 2052, Australia.
L A
LA
Yeoh
A
A
Srinivasan
T P
TP
Martin
O
O
Klochan
A P
AP
Micolich
A R
AR
Hamilton