Normal state specific heat in the cuprates La$_{2-x}$Sr$_x$CuO$_4$ and Bi$_{2+y}$Sr$_{2-x-y}$La$_x$CuO$_{6+δ}$ near the critical point of the pseudogap phase

no code implementations • 22 Jan 2021 • C. Girod, D. LeBoeuf, A. Demuer, G. Seyfarth, S. Imajo, K. Kindo, Y. Kohama, M. Lizaire, A. Legros, A. Gourgout, H. Takagi, T. Kurosawa, M. Oda, N. Momono, J. Chang, S. Ono, G. -q. Zheng, C. Marcenat, L. Taillefer, T. Klein

In La$_{2-x}$Sr$_x$CuO$_4$ at $x=p = 0. 22$, $0. 24$ and $0. 25$, $C_e / T = 15-16~{\rm mJmol}^{-1}{\rm K}^{-2}$ at $T = 2~{\rm K}$, values that are twice as large as those measured at higher doping ($p > 0. 3$) and lower doping ($p < 0. 15$).

Superconductivity Strongly Correlated Electrons

Intriguing magnetism of the topological kagome magnet TbMn_6Sn_6

no code implementations • 14 Jan 2021 • C. Mielke III, Wenlong Ma, V. Pomjakushin, O. Zaharko, X. Liu, J. -X. Yin, S. S. Tsirkin, T. A. Cochran, M. Medarde, V. Poree, D. Das, C. N. Wang, J. Chang, T. Neupert, A. Amato, S. Jia, M. Z. Hasan, H. Luetkens, Z. Guguchia

These fluctuations exhibit a slowing down below $T_{\rm C1}^{*}$~${\simeq}$~120~K, and we see the formation of static patches with ideal out-of-plane order below $T_{\rm C1}$~${\simeq}$~20~K which grow in a volume with decreasing temperature.

Strongly Correlated Electrons Materials Science Other Condensed Matter

Strong coupling nature of kagome superconductivity in LaRu$_3$Si$_2$

no code implementations • 31 Dec 2020 • C. Mielke III, Y. Qin, J. -X. Yin, H. Nakamura, D. Das, K. Guo, R. Khasanov, J. Chang, Z. Q. Wang, S. Jia, S. Nakatsuji, A. Amato, H. Luetkens, G. Xu, Z. M. Hasan, Z. Guguchia

We report muon spin rotation (${\mu}$SR) experiments together with first-principles calculations on microscopic properties of superconductivity in the kagome superconductor LaRu$_3$Si$_2$ with $T_{\rm c}$ ${\simeq}$ 7K.

Superconductivity