TY - JOUR
T1 - Microscopic observation of heavy quasiparticle formation in the intermediate valence compound EuNi2P2
T2 - 31PNMR study
AU - Higa, Nonoka
AU - Yogi, Mamoru
AU - Kuroshima, Hiroko
AU - Toji, Tatsuki
AU - Niki, Haruo
AU - Hiranaka, Yuichi
AU - Nakamura, Ai
AU - Nakama, Takao
AU - Hedo, Masato
AU - Ōnuki, Yoshichika
N1 - Funding Information:
We would like to thank K. Magishi, Y. Tokunaga, and K. Ishida for useful comments and discussion. This work was supported by JSPS KAKENHI Grant Numbers JP20102002, JP23540418, JP16K05453, JP17K05547 and JGC-S SCHOLARSHIP FOUNDATION.
Funding Information:
Acknowledgments We would like to thank K. Magishi, Y. Tokunaga, and K. Ishida for useful comments and discussion. This work was supported by JSPS KAKENHI Grant Numbers JP20102002, JP23540418, JP16K05453, JP17K05547 and JGC-S SCHOLARSHIP FOUNDATION.
Publisher Copyright:
© 2018 The Physical Society of Japan.
PY - 2018
Y1 - 2018
N2 - We report 31P NMR measurements under various magnetic fields up to 7 T for the intermediate valence compound EuNi2P2, which shows heavy electronic states at low temperatures. In the high-temperature region above 40 K, the Knight shift followed the Curie-Weiss law reflecting localized 4 f states. In addition, the behavior corresponding to the temperature variation of the average valence of Eu was observed in the nuclear spin-lattice relaxation rate 1=T1. With the occurrence of the Kondo effect, 1=T1 was clearly reduced below 40 K, and the Knight shift becomes almost constant at low temperatures. From these results, the formation of heavy quasiparticles by the hybridization of Eu 4 f electrons and conduction electrons was clarified from microscopic viewpoints.
AB - We report 31P NMR measurements under various magnetic fields up to 7 T for the intermediate valence compound EuNi2P2, which shows heavy electronic states at low temperatures. In the high-temperature region above 40 K, the Knight shift followed the Curie-Weiss law reflecting localized 4 f states. In addition, the behavior corresponding to the temperature variation of the average valence of Eu was observed in the nuclear spin-lattice relaxation rate 1=T1. With the occurrence of the Kondo effect, 1=T1 was clearly reduced below 40 K, and the Knight shift becomes almost constant at low temperatures. From these results, the formation of heavy quasiparticles by the hybridization of Eu 4 f electrons and conduction electrons was clarified from microscopic viewpoints.
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U2 - 10.7566/JPSJ.87.094708
DO - 10.7566/JPSJ.87.094708
M3 - Article
AN - SCOPUS:85053680911
SN - 0031-9015
VL - 87
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
IS - 9
M1 - 094708
ER -