Volume 113, Number 3, February 2016
|Number of page(s)||5|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||25 February 2016|
Revisitation of superconductivity in K2Cr3As3 based on the six-band model
1 School of Physics, Beijing Institute of Technology - Beijing 100081, China
2 Institute of Physics, Chinese Academy of Sciences - Beijing 100190, China
3 Collaborative Innovation Center of Quantum Matter - Beijing, China
4 Department of Physics, Purdue University - West Lafayette, IN 47907, USA
Received: 7 December 2015
Accepted: 8 February 2016
We investigate the pairing symmetry of the newly synthesized quasi–one-dimension K2Cr3As3 superconductor based on the six-band model. We adopt standard random phase approximation to study the Hubbard-Hund model of the system. Our results confirm the conclusions obtained from our previous three-band model: the triplet pz- and -wave pairings serve as the leading pairing symmetries in the weak and strong Hund's rule coupling regimes, respectively. For physically realistic parameters, the triplet pz-wave pairing driven by ferromagnetic fluctuations is the leading pairing symmetry of the system. The consistency between the results of these two models suggests that the obtained pz-wave pairing symmetry is physical and model independent.
PACS: 74.20.Rp – Pairing symmetries (other than s-wave) / 74.20.Pq – Electronic structure calculations / 74.20.Mn – Nonconventional mechanisms
© EPLA, 2016
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