Non-s-wave unconventional superconductivity near nonmagnetic Mott insulating states in organic triangular-lattice systems
Absence of spin susceptibility decrease in a bulk organic superconductor with triangular lattice
We study a bulk organic triangular-lattice system in which superconductivity emerges near a nonmagnetic nonmagnetic mott insulating phase.
We demonstrate, by using low-power nuclear magnetic resonance (nmr) measurements, that the spin susceptibility of the superconducting state retains the normal state value even deep in the superconducting state.
This result indicates the possibility that the material exhibits spin-triplet superconductivity.
Our finding will bring insights also into understanding the 2d materials with triangular moire superlattices that are considered also to show unconventional superconductivities near a nonmagnetic nonmagnetic insulating phase.
Y. Saitou, N. Ichikawa, R. Yamamoto, D. Kitamata, M. Suzuki, Y. Yanagita, T. Namaizawa, S. Komuro, T. Furukawa, R. Kato, T. Itou