The nematicity induced d -symmetry charge density wave in electron-doped iron-pnictide superconductors
| Autor: | Chung Pin Chou, C. S. Ting, Hong Yi Chen |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Superconductivity
Physics Local density of states Condensed matter physics Energy Engineering and Power Technology Charge density Fermi surface Condensed Matter Physics 01 natural sciences 010305 fluids & plasmas Electronic Optical and Magnetic Materials Liquid crystal Condensed Matter::Superconductivity Phase (matter) 0103 physical sciences Condensed Matter::Strongly Correlated Electrons Electrical and Electronic Engineering 010306 general physics Charge density wave Phase diagram |
| Zdroj: | Physica C: Superconductivity and its Applications. 546:61-67 |
| ISSN: | 0921-4534 |
| DOI: | 10.1016/j.physc.2017.12.009 |
| Popis: | The interplay among the nematicity, the stripe spin-density-wave (SDW) order and superconductivity in iron-pnictides is studied in a self-consistent Bogoliubov-de Gennes equations. Our calculations have shown that the nematic-order breaks the degeneracy of dxz and dyz orbitals and causes the elliptic Fermi surface near the Γ point in the normal state. In addition, the appearance of the orthorhombic magnetic fluctuations generates two uneven pairs of peaks at ( ± π, 0) and (0, ± π) in its Fourier transformation. All these are comparing favorably with experimental measurements. In the nematic phase, our results indicate that the charge density and its spatial image in the local density of states exhibit a d x 2 − y 2 -like symmetry. Finally, the complete phase diagram is obtained and the nematic phase is found to be in a narrow region close to the SDW transition in the electron-doped iron-pnictide superconductors. |
| Databáze: | OpenAIRE |
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