2013/11/04 by Jing-Rong Wang, Wang, Jing-Rong, Guo-Zhu Liu +1
Physics and Astronomy · #Physics of Superconductivity and Magnetism #Advanced Condensed Matter Physics #Quantum and electron transport phenomena
paper · pdf · doi:10.48550/arxiv.1311.0561
In recent years, there have been increasing experimental evidence suggesting the existence of an electronic nematic state in a number of unconventional d-wave superconductors. Interestingly, it is expected that the long-range nematic order can coexist with d-wave superconductivity. We analyze the in-plane upper critical field Hc2 after taking the influence of nematic state into account, and find that the four-fold oscillation of angle-dependent Hc2 in a pure d-wave superconducting state is turned into a novel two-fold oscillation pattern by a weak nematic order. Moreover, such effect is much more significant at higher temperatures. These behaviors are measurable and may be used to probe the predicted coexisting nematic order in d-wave superconductors. In addition, we show that the concrete angular dependence of Hc2 and the positions of its maximum can be strongly affected by several parameters, including temperature and Tc.