Evolution of an Unconventional Superconducting State inside the Antiferromagnetic Phase of CeNiGe$ 3$ under Pressure: a $^{73}$Ge-Nuclear-Quadrupole-Resonance Study - Condensed Matter > Strongly Correlated ElectronsReport as inadecuate




Evolution of an Unconventional Superconducting State inside the Antiferromagnetic Phase of CeNiGe$ 3$ under Pressure: a $^{73}$Ge-Nuclear-Quadrupole-Resonance Study - Condensed Matter > Strongly Correlated Electrons - Download this document for free, or read online. Document in PDF available to download.

Abstract: We report a $^{73}$Ge nuclear-quadrupole-resonance NQR study on novelevolution of unconventional superconductivity in antiferromagnetic AFMCeNiGe$ 3$. The measurements of the $^{73}$Ge-NQR spectrum and the nuclearspin-lattice relaxation rate $1-T 1$ have revealed that the unconventionalsuperconductivity evolves inside a commensurate AFM phase around the pressure$P$ where N\-{e}el temperature $T { m N}$ exhibits its maximum at 8.5 K. Thesuperconducting transition temperature $T { m SC}$ has been found to beenhanced with increasing $T { m N}$, before reaching the quantum criticalpoint at which the AFM order collapses. Above $T { m SC}$, the AFM structuretransits from an incommensurate spin-density-wave order to a commensurate AFMorder at $T\sim 2$ K, accompanied by a longitudinal spin-density fluctuation.With regard to heavy-fermion compounds, these novel phenomena have hithertonever been reported in the $P$-$T$ phase diagram.



Author: A. Harada, H. Mukuda, Y. Kitaoka, A. Thamizhavel, Y. Okuda, R. Settai, Y. Onuki, K. M. Itoh, E. E. Haller, H. Harima

Source: https://arxiv.org/







Related documents