TY  - JOUR
AU  - Wang, Jinghui
AU  - Ran, Kejing
AU  - Li, Shichao
AU  - Ma, Zhen
AU  - Bao, Song
AU  - Cai, Zhengwei
AU  - Zhang, Youtian
AU  - Nakajima, Kenji
AU  - Ohira-Kawamura, Seiko
AU  - Čermák, P.
AU  - Schneidewind, A.
AU  - Savrasov, Sergey Y.
AU  - Wan, Xiangang
AU  - Wen, Jinsheng
TI  - Evidence for singular-phonon-induced nematic superconductivity in a topological superconductor candidate Sr0.1Bi2Se3
JO  - Nature Communications
VL  - 10
IS  - 1
SN  - 2041-1723
CY  - [London]
PB  - Nature Publishing Group UK
M1  - FZJ-2019-03606
SP  - 2802
PY  - 2019
AB  - Superconductivity mediated by phonons is typically conventional, exhibiting a momentumindependents-wave pairing function, due to the isotropic interactions between electrons andphonons along different crystalline directions. Here, by performing inelastic neutron scattering measurements on a superconducting single crystal of Sr0.1Bi2Se3, a prime candidate forrealizing topological superconductivity by doping the topological insulator Bi2Se3, we find thatthere exist highly anisotropic phonons, with the linewidths of the acoustic phonons increasingsubstantially at long wavelengths, but only for those along the [001] direction. This observationindicates a large and singular electron-phonon coupling at small momenta, which wepropose to give rise to the exotic p-wave nematic superconducting pairing in the MxBi2Se3(M = Cu, Sr, Nb) superconductor family. Therefore, we show these superconductors to beexample systems where electron-phonon interaction can induce more exotic superconductingpairing than the s-wave, consistent with the topological superconductivity.https://doi.org/10.1038/s41467-019-10942-2 OPEN
LB  - PUB:(DE-HGF)16
C6  - pmid:31243284
UR  - <Go to ISI:>//WOS:000472840400017
DO  - DOI:10.1038/s41467-019-10942-2
UR  - https://juser.fz-juelich.de/record/863567
ER  -