Piezoelectric rotator for studying quantum effects in semiconductor nanostructures at high magnetic fields and low temperatures

摘要

We report the design and development of a piezoelectric sample rotationsystem, and its integration into an Oxford Instruments Kelvinox 100 dilutionrefrigerator, for orientation-dependent studies of quantum transport insemiconductor nanodevices at millikelvin temperatures in magnetic fields up to10T. Our apparatus allows for continuous in situ rotation of a device through>100deg in two possible configurations. The first enables rotation of the fieldwithin the plane of the device, and the second allows the field to be rotatedfrom in-plane to perpendicular to the device plane. An integrated angle sensorcoupled with a closed-loop feedback system allows the device orientation to beknown to within +/-0.03deg whilst maintaining the sample temperature below100mK.