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In this paper, we report the results of a high pressure study of the itinerant 5f-electron ferromagnet UCoGa. The work is focused on probing the expected ferromagnet-to-paramagnet quantum phase transition induced by high pressure and on the…

Our single crystal study reveals that PrTr2Al20 (Tr = Ti and V) provides the first examples of a cubic {\Gamma}3 nonmagnetic ground doublet system that shows the Kondo effect including a -ln T dependent resistivity. The {\Gamma}3…

Strongly Correlated Electrons · Physics 2015-03-19 Akito Sakai , Satoru Nakatsuji

The electronic property and magnetic susceptibility of Ce$_3$Pd$_3$Bi$_4$ were systemically investigated from 18 K to 290 K for varying values of cell-volume using dynamic mean-field theory coupled with density functional theory. By…

Strongly Correlated Electrons · Physics 2022-02-08 Chenchao Xu , Chao Cao , Jian-Xin Zhu

A magnetic Weyl semimetal presents the intriguing possibility of controlling topological properties through magnetic order. The kagome compound \CoSnS~has emerged as one of the most thoroughly characterized magnetic Weyl semimetals, yet the…

Strongly Correlated Electrons · Physics 2025-01-10 Irek Mukhamedshin , Pawel Wzietek , Fabrice Bert , Philippe Mendels , Anne Forget , Dorothée Colson , Véronique Brouet

Quantum phase transitions in quantum matter occur at zero temperature between distinct ground states by tuning a nonthermal control parameter. Often, they can be accurately described within the Landau theory of phase transitions, similarly…

We compute the transition temperature $T_c$ and the Ginzburg temperature $T_{\rm G}$ above $T_c$ near a quantum critical point at the boundary of an ordered phase with a broken discrete symmetry in a two-dimensional metallic electron…

Strongly Correlated Electrons · Physics 2011-08-18 J. Bauer , P. Jakubczyk , W. Metzner

Chiral topological semimetals hosting multifold fermions and exotic surface states represent a frontier in topological materials research. Among them, noncentrosymmetric cubic B20 compounds-notably transition-metal silicides and…

Strongly Correlated Electrons · Physics 2026-02-09 Shangjie Tian , Xiangjiang Dong , Bowen Zhang , Zhijun Tu , Runze Yu , Hechang Lei , Shouguo Wang

The quest for fascinating quantum states arising from the interplay between correlation, frustration, and topology is at the forefront of condensed-matter physics. Recently discovered nonmagnetic kagome metals $A$V${_3}$Sb${_5}$ ($A=$ K,…

We report $^{17}$O NMR measurements in single crystals of overdoped Bi$_2$Sr$_2$CaCu$_2$O$_{8+\delta}$ with $T_c=82$ K. We measure the full anisotropy of the planar oxygen Knight shift, electric field gradient, and spin lattice relaxation…

Strongly Correlated Electrons · Physics 2015-05-30 J. Crocker , A. P. Dioguardi , N. apRoberts-Warren , A. C. Shockley , H. -J. Grafe , Z. Xu , J. Wen , G. Gu , N. J. Curro

We report on a zero-field 63Cu nuclear quadrupole resonance (NQR) study of nonmagnetic Mg impurity substituted Cu1-xMgxGeO3 (single crystals; the spin-Peierls transition temperature Tsp~14, 13.5, and 11 K for x=0, 0.0043, and 0.020) in a…

Strongly Correlated Electrons · Physics 2009-11-07 Y. Itoh , T. Machi , N. Koshizuka , T. Masuda , K. Uchinokura

We report $^{73}$Ge nuclear quadrupole resonance (NQR) and magnetic resonance (NMR) spectroscopy in the heavy-fermion quantum-critical ferromagnet CeRh$_6$Ge$_4$. NQR and NMR spectral measurements at the two non-equivalent Ge sites reveal…

The magnetostructural transitions and magnetoelectric effects reported in TbMn2O5 are described theoretically and shown to correspond to two essentially different mechanisms for the induced ferroelectricity. The incommensurate and…

Materials Science · Physics 2010-01-22 P. Toledano , W. Schranz , G. Krexner

A large anomalous Hall effect (AHE) has recently been observed in the intercalated transition metal dichalcogenide (TMDC) Co$_{1/3}$NbS$_{2}$ below a known magnetic phase transition at $T_N$ = 29 K. The spins in this material are widely…

The tetragonal compound YbRu$_{2}$Ge$_{2}$ exhibits a non-magnetic transition at $T_0$=10.2K and a magnetic transition at $T_1$=6.5K in zero magnetic field. We present a model for this material based on a quasi-quartet of Yb$^{3+}$…

Strongly Correlated Electrons · Physics 2009-11-13 Tetsuya Takimoto , Peter Thalmeier

We have investigated the underlying magnetism in newly discovered single crystal Kondo lattices CeXAl4Si2, where X = Rh, Ir. We show that the compound undergoes an incommensurate-to-commensurate magnetic transition at Tc = 9.19 K (10.75 K…

Strongly Correlated Electrons · Physics 2016-10-31 J. Gunasekera , L. Harriger , A. Dahal , A. Maurya , T. Heitmann , S. Disseler , A. Thamizhavel , S. Dhar , D. K. Singh

We report $^{59}$Co nuclear quadrupole resonance (NQR) measurements on the Nd-based compound NdCo$_2$Zn$_{18}$Ga$_2$, which undergoes an antiferromagnetic transition at $T_{\rm N} = 1.5$ K. Although the NQR spectra show no detectable change…

Strongly Correlated Electrons · Physics 2026-04-21 Tetsuro Kubo , Atsushi Sasaki , Keita Murooka , Hisashi Kotegawa , Rikako Yamamoto , Takahiro Onimaru , Hideki Tou

We have investigated the critical phenomenon associated with the magnetic phase transition in the half-metallic full-Heusler Co$_2$TiGe. The compound undergoes a continuous ferromagnetic to paramagnetic phase transition at the Curie…

Materials Science · Physics 2019-06-11 Shubhankar Roy , Nazir Khan , Ratnadwip Singha , Arnab Pariari , Prabhat Mandal

The layered {\beta}-NaMnO2, a promising Na-ion energy-storage material has been investigated for its triangular lattice capability to promote complex magnetic configurations that may release symmetry restrictions for the coexistence of…

We give a quantitative analysis of the previously published nuclear magnetic resonance (NMR) experiments in the k-(ET)2X family of organic charge transfer salts by using the phenomenological spin fluctuation model of Moriya, and Millis,…

Strongly Correlated Electrons · Physics 2009-11-13 Eddy Yusuf , B. J. Powell , Ross H. McKenzie

Synchrotron X-ray diffraction investigations of two single crystals of Na_xCoO_2 from different batches with composition x = 0.525-0.530 reveal homogeneous incommensurate sodium ordering with propagation vector (0.53 0.53 0) at…

Strongly Correlated Electrons · Physics 2010-07-16 R. Feyerherm , E. Dudzik , S. Valencia , A. U. B. Wolter , C. J. Milne , S. Landsgesell , D. Alber , D. N. Argyriou