TY - JOUR
T1 - Line node positions of the superconducting gap function of UPd2 Al3
AU - Thalmeier, Peter
AU - Parker, David
PY - 2009/4/1
Y1 - 2009/4/1
N2 - The field-angular oscillation of the magnetothermal conductivity is a powerful method for clarifying the gap symmetry of unconventional superconductors. It has been used successfully in Sr2 RuO4, CeCoIn5, and the cuprates, and has been applied to the heavy-fermion superconductor UPd2 Al3. Despite this last application, however, there is still a controversy regarding the gap symmetry of UPd2 Al3, with separate proposals for Δ (k) = Δ0 cos kz and Δ (k) = Δ0 cos2 kz in the literature from analyzing the same thermal-conductivity data. In this paper we systematically study this important issue and show conclusively from all available experimental evidence that, consistent with theoretical grounds, Δ0 cos kz is the actual gap function of UPd2 Al3.
AB - The field-angular oscillation of the magnetothermal conductivity is a powerful method for clarifying the gap symmetry of unconventional superconductors. It has been used successfully in Sr2 RuO4, CeCoIn5, and the cuprates, and has been applied to the heavy-fermion superconductor UPd2 Al3. Despite this last application, however, there is still a controversy regarding the gap symmetry of UPd2 Al3, with separate proposals for Δ (k) = Δ0 cos kz and Δ (k) = Δ0 cos2 kz in the literature from analyzing the same thermal-conductivity data. In this paper we systematically study this important issue and show conclusively from all available experimental evidence that, consistent with theoretical grounds, Δ0 cos kz is the actual gap function of UPd2 Al3.
UR - http://www.scopus.com/inward/record.url?scp=65649091686&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.79.134514
DO - 10.1103/PhysRevB.79.134514
M3 - Article
AN - SCOPUS:65649091686
SN - 1098-0121
VL - 79
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 13
M1 - 134514
ER -