Magnetic impurities make superconductivity in 3D Dirac semi-metal triplet
1 Electrophysics Department, National Chiao Tung University - Hsinchu 30050, Taiwan, R.O.C.
2 Physics Department, Ariel University - Ariel 40700, Territories Administered by Israel
3 Physics Department, Bar-Ilan University - 52900 Ramat-Gan, Israel
4 School of Physics, Peking University - Beijing 100871, China
5 Collaborative Innovation Center of Quantum Matter - Beijing, China
Received: 26 August 2014
Accepted: 19 March 2015
Conventional electron-phonon coupling induces either odd (triplet) or even (singlet) pairing states in a time reversal and inversion invariant Dirac semi-metal. It was shown that the energy of the singlet channel, always lower, prevails over the triplet. The role of both magnetic and non-magnetic spatial disorder was discovered. It is predicted that the magnetic part of scattering establishes a triplet ground state suppressing the singlet phase. On the other hand, the non-magnetic impurities slightly affecting the singlet phase may significantly suppress the triplet state.
PACS: 74.20.Fg – BCS theory and its development / 74.90.+n – Other topics in superconductivity (restricted to new topics in section 74) / 74.20.Rp – Pairing symmetries (other than s-wave)
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