Au - Ge Alloys for Wide-Range Low-Temperature On-Chip Thermometry
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Peer-reviewed
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Authors
Dann, James https://orcid.org/0000-0002-1668-4385
Verpoort, Philipp https://orcid.org/0000-0003-1319-5006
Ferreira De Oliveira, J
Rowley, Stephen
Datta, A
Abstract
We present results for a Au
Ge alloy that is useful as a resistance-based thermometer from room temperature down to at least 0.2 K. Over a wide range, the electrical resistivity of the alloy shows a logarithmic temperature dependence, which simultaneously retains the sensitivity required for practical thermometry while also maintaining a relatively modest and easily measurable value of resistivity. We characterize the sensitivity of the alloy as a possible thermometer and show that it compares favorably with commercially available temperature sensors. We experimentally identify that the characteristic logarithmic temperature dependence of the alloy stems from Kondo-like behavior induced by the specific heat treatment it undergoes.
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Journal Title
Physical Review Applied
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Journal ISSN
2331-7019
2331-7019
2331-7019
Volume Title
12
Publisher
APS Physics
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All rights reserved
Sponsorship
Royal Society (IMF130944)
Royal Society (uf130122)
Royal Society (RGF/EA/180034)
European Commission (639526)
EPSRC (EP/K503757/1)
EPSRC (1641845)
Royal Society (uf130122)
Royal Society (RGF/EA/180034)
European Commission (639526)
EPSRC (EP/K503757/1)
EPSRC (1641845)
J.R.A.D., P.C.V., G.J.C., and V.N. acknowledge funding from the Engineering and Physical Sciences Research
Council, United Kingdom. G.J.C. and S.E.R. acknowledge funding from the Royal Society, United Kingdom.
J.F.O. thanks the Brazilian Agency CNPq. A.D. and
S.K-N. acknowledge financial support through a European
Research Council Starting Grant (Grant No. ERC-2014-
STG-639526, NANOGEN).