Regensburg 2013 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 12: Poster Session Superconductivity
TT 12.23: Poster
Montag, 11. März 2013, 15:00–19:00, Poster D
In-plane upper critical field of d-wave superconductors — •Wang Jing-Rong1,2, Liu Guo-Zhu1, Ribeiro Pedro2, and Kirchner Stefan2,3 — 1Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China — 2Max Planck Institute for the Physics of Complex Systems, 01187 Dresden, Germany — 3Max Planck Institute for Chemical Physics of Solids, 01187 Dresden, Germany
Determining the full gap symmetry of unconventional superconductors is an important but difficult task. One experimental method to determine the gap symmetry is to measure the angular dependence of the in-plane upper critical field. Due to their large effective mass, heavy fermion superconductors are usually Pauli limited but also orbital coupling contributes to Hc2. Recent experiments on CeCu2Si2 indicate that the in-plane upper critical field exhibits a number of interesting behaviors. Motivated by these experiments, we systematically study the angular independence of the upper critical field including both orbital coupling and Zeeman coupling. We compare our theoretical results with the relevant experiments[1].
[1] H. Vieyra et al. PRL 106, 207001 (2011).