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Article overview
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Design and construction of a point-contact spectroscopy rig with lateral scanning capability | | M. Tortello
; W. K. Park
; C. O. Ascencio
; P. Saraf
; L. H. Greene
; | | Date: |
13 Jun 2016 | | Abstract: | The design and realization of a cryogenic rig for point-contact spectroscopy
measurements in the needle-anvil configuration is presented. Thanks to the use
of two piezoelectric nano-positioners, the tip can move along the vertical
($z$) and horizontal ($x$) direction and thus the rig is suitable to probe
different regions of a sample extit{in situ}. Moreover, it can also form
double point-contacts on different facets of a single crystal for achieving,
e.g., an interferometer configuration for phase-sensitive measurements. For the
latter purpose, the sample holder can also host a Helmholtz coil for applying a
small transverse magnetic field to the junction. A semi-rigid coaxial cable can
be easily added for studying the behavior of Josephson junctions under
microwave irradiation. The rig can be detached from the probe and thus used
with different cryostats. The performance of this new probe has been tested in
a Quantum Design PPMS system by conducting point-contact Andreev reflection
measurements on Nb thin films over large areas as a function of temperature and
magnetic field. | | Source: | arXiv, 1606.4024 | | Services: | Forum | Review | PDF | Favorites | |
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