Bulletin of the American Physical Society
APS March Meeting 2023
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session D27: Superconductivity:Low Dimensional-I
3:00 PM–5:48 PM,
Monday, March 6, 2023
Room: Room 219
Sponsoring
Unit:
DCMP
Chair: Yafis Barlas, University of Nevada, Reno
Abstract: D27.00009 : d-wave helical superconducting state in tricolor Kondo superlattices revealed by nonreciprocal transport
4:36 PM–4:48 PM
Presenter:
Yuichi Kasahara
(Kyoto University)
Authors:
Yuichi Kasahara
(Kyoto University)
Hiroto Asaeda
(Kyoto University)
Yuuki Kosuge
(Kyoto University)
Toshiki Kiyosue
(Kyoto University)
Shota Suetsugu
(Kyoto University)
Masahiro Naristuka
(RIKEN)
Takahito Terashima
(Kyoto University)
Tomoya Asaba
(Kyoto University)
Yuji Matsuda
(Kyoto University)
Here, we report nonreciprocal transport properties of tricolor Kondo superlattices, in which global inversion symmetry breaking is introduced into d-wave superconductor CeCoIn5 with atomic thickness by an asymmetric sequence YbCoIn5/CeCoIn5/YbRhIn5, where YbCoIn5 and YbRhIn5 are nonmagnetic metals. We measured the second harmonic resistance R2ω under parallel magnetic fields applied perpendicular to the injected electrical current within the 2D plane. At high temperatures near Tc, R2ω first increases, then peaks at intermediate field regime, and finally vanishes at Hc2. Similar behavior has been reported in previous results on superconductors with s-wave symmetry. On the other hand, at sufficiently low temeratures, strong suppression of R2ω is observed at H*, showing a double-peak structure. The transition line determined from H* separates low- and high-field superconducting phases, suggesting the emergence of d-wave helical superconducting state in the tricolor Kondo superlattices.
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