Mechanism for unconventional superconductivity in the hole-doped Rashba-Hubbard model
| العنوان: | Mechanism for unconventional superconductivity in the hole-doped Rashba-Hubbard model |
|---|---|
| المؤلفون: | Andrés Greco, Andreas P. Schnyder |
| المصدر: | CONICET Digital (CONICET) Consejo Nacional de Investigaciones Científicas y Técnicas instacron:CONICET |
| سنة النشر: | 2017 |
| مصطلحات موضوعية: | Hubbard model, Ciencias Físicas, General Physics and Astronomy, FOS: Physical sciences, 01 natural sciences, 010305 fluids & plasmas, purl.org/becyt/ford/1 [https], Superconductivity (cond-mat.supr-con), Condensed Matter - Strongly Correlated Electrons, ANTIFERROMAGNETISM, PAIRING MECHANISMS, SUPERCONDUCTING ORDER PARAMETER, Condensed Matter::Superconductivity, 0103 physical sciences, Antiferromagnetism, 010306 general physics, TOPOLOGICAL PHASES OF MATTER, Computer Science::Distributed, Parallel, and Cluster Computing, Spin-½, Superconductivity, Physics, Condensed matter physics, Strongly Correlated Electrons (cond-mat.str-el), SUPERCONDUCTIVITY, Condensed Matter - Superconductivity, Spin–orbit interaction, purl.org/becyt/ford/1.3 [https], Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, Square lattice, SPIN-TRIPLET PAIRING, Pairing, SPIN-ORBIT COUPLING, Condensed Matter::Strongly Correlated Electrons, Random phase approximation, CIENCIAS NATURALES Y EXACTAS, Física de los Materiales Condensados |
| الوصف: | Motivated by the recent resurgence of interest in topological superconductivity, we study in this paper superconducting pairing instabilities of the hole-doped Rashba-Hubbard model on the square lattice with first- and second-neighbor hopping. Within a weak-coupling approach based on the random phase approximation, we compute the spin-fluctuation mediated paring interactions as a function of spin-orbit coupling and hole doping. Rashba spin-orbit coupling splits the spin degeneracies of the bands, which leads to two van Hove singularities at two different fillings. We find that for a broad doping region in between these two van Hove fillings the spin fluctuations exhibit a strong ferromagnetic contribution. Because of these ferromagnetic fluctuations, the triplet $f$-wave pairing channel is dominant within this filling region, resulting in a topologically nontrival phase. We discuss possible experimental realizations of this phase in heavy-fermion hybrid structures. 4+ pages, 4 figures |
| وصف الملف: | application/pdf |
| اللغة: | English |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::11182e79b7d25df43986a962ee3dc07c http://arxiv.org/abs/1705.01904 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....11182e79b7d25df43986a962ee3dc07c |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |