%0 Journal Article %1 noauthororeditor %A Hibino, Ruo %A Yanagisawa, Tatsuya %A Mikami, Yoshito %A Hidaka, Hiroyuki %A Amitsuka, Hiroshi %A Zherlitsyn, Sergei %A Wosnitza, Joachim %A Yamane, Yu %A Onimaru, Takahiro %D 2023 %I Journal of the Physical Society of Japan %J JPS Conf. Proc. %K b %P 011089 %R 10.7566/JPSCP.38.011089 %T Change in the ground state of Y$_1-x$Pr$_x$Ir$_2$Zn$_20$ due to a quadrupolar Kondo effect with Pr concentration $x$ %U https://journals.jps.jp/doi/10.7566/JPSCP.38.011089 %V 38 %X We measured the elastic constants (C11 − C12)/2 and C44 of the non-Kramers system Y0.92Pr0.08Ir2Zn20 (Pr-8% system) by means of ultrasound to check how the single-site quadrupolar Kondo effect is modulated by increasing the Pr concentration. In the Pr-8% system, a temperature dependence proportional to √T is observed in (C11 − C12) /2 below ∼ 0.5 K. This behavior rather corresponds to the theoretical prediction of the quadrupolar Kondo virtual “lattice” model, unlike that of a Pr-3.4% system, which shows a logarithmic temperature dependence based on the “single-site” quadrupolar Kondo theory. Such temperature dependence proportional to √T is also observed in a Pr-37% system below 0.15 K, which suggests that a crossover of the quantum ground state from the “single-site” model to the “lattice” model occurs as the localized quadrupolar interaction cannot be ignored with increasing Pr concentration.

@article{noauthororeditor, abstract = {We measured the elastic constants (C11 − C12)/2 and C44 of the non-Kramers system Y0.92Pr0.08Ir2Zn20 (Pr-8% system) by means of ultrasound to check how the single-site quadrupolar Kondo effect is modulated by increasing the Pr concentration. In the Pr-8% system, a temperature dependence proportional to √T is observed in (C11 − C12) /2 below ∼ 0.5 K. This behavior rather corresponds to the theoretical prediction of the quadrupolar Kondo virtual “lattice” model, unlike that of a Pr-3.4% system, which shows a logarithmic temperature dependence based on the “single-site” quadrupolar Kondo theory. Such temperature dependence proportional to √T is also observed in a Pr-37% system below 0.15 K, which suggests that a crossover of the quantum ground state from the “single-site” model to the “lattice” model occurs as the localized quadrupolar interaction cannot be ignored with increasing Pr concentration.}, added-at = {2023-06-07T12:58:59.000+0200}, author = {Hibino, Ruo and Yanagisawa, Tatsuya and Mikami, Yoshito and Hidaka, Hiroyuki and Amitsuka, Hiroshi and Zherlitsyn, Sergei and Wosnitza, Joachim and Yamane, Yu and Onimaru, Takahiro}, biburl = {https://www.bibsonomy.org/bibtex/2b60212d345acf2370ec04102a0e3203c/ctqmat}, day = 22, description = {Change in the ground state of Y1−xPrxIr2Zn20 due to a quadrupolar Kondo effect with Pr concentration x }, doi = {10.7566/JPSCP.38.011089}, interhash = {ed2a23f1710c1c5b9a50833356ec2e54}, intrahash = {b60212d345acf2370ec04102a0e3203c}, journal = {JPS Conf. Proc.}, keywords = {b}, month = {05}, pages = 011089, publisher = {Journal of the Physical Society of Japan}, timestamp = {2023-10-19T13:54:03.000+0200}, title = {Change in the ground state of Y$_{\mathbf{1-x}}$Pr$_{\mathbf{x}}$Ir$_{\mathbf{2}}$Zn$_{\mathbf{20}}$ due to a quadrupolar Kondo effect with Pr concentration $\mathbf{x}$}, url = {https://journals.jps.jp/doi/10.7566/JPSCP.38.011089}, volume = 38, year = 2023 }