2026-09-22T09:44:13Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/80684 2023-07-11 col_2142_5131 col_2142_8859 com_2142_5130 com_2142_8858 com_2142_234

Van Harlingen, Dale J. Yanoff, Brian David 2015-09-25T20:03:37Z 2015-09-25T20:03:37Z 10000-01-01 2000 2000 We have constructed a high resolution tunnel-diode oscillator based measurement system suitable for measuring the temperature dependence of the magnetic penetration depth of superconductors, lambda(T), at very low temperatures. I report on measurements of lambda(T) in high quality single crystals of the perovskite superconductor Sr2RuO4 down to 0.04 K. We observe quadratic temperature dependence at low temperatures. There is no sign of the crossover or second phase transition predicted for a multi-band superconductor. We argue that power law behavior is consistent with an energy gap with nodes, and discuss how the observed quadratic dependence can arise from several possible mechanisms. We propose that non-local effects may be more important in determining the temperature dependence than impurity scattering, and are sufficient to explain the deviation from the linear behavior expected for local superconductors with line nodes. These results are inconsistent with the candidate p-wave states predicted by leading theories. Made available in DSpace on 2015-09-25T20:03:37Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 9971229.pdf: 4461335 bytes, checksum: d8989abe741eaeac8955a1b32b8e50cc (MD5) Previous issue date: 2000 Embargo set by: Seth Robbins for item 81966 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs U of I Only 104 p. Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2000. http://hdl.handle.net/2142/80684 (MiAaPQ)AAI9971229 eng Physics, Condensed Matter Temperature Dependence of the Penetration Depth in the Unconventional Superconductor Strontium Ruthenate text Physics Physics University of Illinois at Urbana-Champaign Dissertation Ph.D.