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At ambient temperatures, CeRuSn exhibits an extraordinary structure with a coexistence of two types of Ce ions in a metallic environment, namely trivalent Ce3+ and intermediate valent Ce(4-x)+. Charge ordering produces a doubling of the…

Strongly Correlated Electrons · Physics 2012-02-24 R. Feyerherm , E. Dudzik , S. Valencia , J. A. Mydosh , Y. -K. Huang , W. Hermes , R. Pöttgen

Recent discovery of topologically non-trivial behavior in Co3Sn2S2 stimulated a notable interest in this itinerant ferromagnet (Tc = 174 K). The exact magnetic state remains ambiguous, with several reports indicating the existence of a…

Strongly Correlated Electrons · Physics 2022-11-30 Ivica Zivkovic , Ravi Yadav , Jian-Rui Soh , ChangJiang Yi , YouGuo Shi , Oleg V. Yazyev , Henrik M. Ronnow

Studied 100-atm O2-annealed RuSr2Gd1.5Ce0.5Cu2O10 (Ru-1222) compound crystallized in a tetragonal I4/mmm space group crystal structure. Thermo-gravemetric (TG) analysis of the compound showed the release of oxygen and breaking to metallic…

Superconductivity · Physics 2009-11-07 V. P. S. Awana , E. Takayama-Muromachi , M. Karppinen , H. Yamauchi

The results of magnetic susceptibility, electrical resistivity (rho), and heat capacity measurements as a function of temperature are reported for the alloys, Ce2Rh(1-x)Co(x)Si3, crystallizing in an AlB2-derived hexagonal strcture. Ce2RhSi3…

Strongly Correlated Electrons · Physics 2008-03-06 Swapnil Patil , Kartik K Iyer , K. Maiti , E. V. Sampathkumaran

Unconventional superconductivity in Ce-based Kondo-lattice materials emerges almost exclusively in the vicinity of weak dipolar magnetic orders, while higher multipolar orders are only known to occur in a few Pr-based unconventional…

We investigated the magnetic field dependence of the superconducting phase transition in heavy fermion CeCoIn_5 (T_c = 2.3 K) using specific heat, magneto-caloric effect, and thermal expansion measurements. The superconducting transition…

Single crystals of the new compound CeCu0.18Al0.24Si1.58 have been grown by high-temperature solution growth method using a eutectic Al-Si mixture as flux. This compound is derived from the binary CeSi2 (tetragonal ThSi2-type, Pearson…

Strongly Correlated Electrons · Physics 2017-01-04 A. Maurya , A. Thamizhavel , S. K. Dhar , A. Provino , M. Pani , G. A. Costa

Kagome materials provide a powerful platform for exploring how flat electronic bands promote symmetry-breaking quantum states, yet studies have so far focused mainly on kagome-derived $d$-electron flat bands. In this paper, we introduce…

CeRh2As2 is rare among superconductors, in that magnetic field tunes it between two distinct superconducting phases. Combined with a lack of local inversion symmetry and an upper critical field exceeding the Pauli paramagnetic limit, this…

The thermopower, S, of CexR1-xB6 (R=La, Pr, Nd) was investigated. S with a positive sign shows a typical behavior observed in the Ce Kondo system, an increase with decreasing temperature at high temperatures and a maximum at low…

Strongly Correlated Electrons · Physics 2009-11-11 M. S. Kim , Y. Nakai , H. Tou , M. Sera , F. Iga , T. Takabatake , S. Kunii

Nuclear magnetic resonance measurements were performed on CeCu$_{2}$Si$_{2}$ in the presence of a magnetic field close to the upper critical field $\mu_{0} H_{\rm c2}$ in order to investigate its superconducting (SC) properties near…

Superconductivity · Physics 2018-10-16 Shunsaku Kitagawa , Genki Nakamine , Kenji Ishida , H. S. Jeevan , C. Geibel , F. Steglich

We examined the magnetic properties of the square-lattice antiferromagnets CeMnAsO and LaMnAsO and their solid solutions La1-xCexMnAsO by resistivity, magnetic susceptibility, and heat capacity measurements below room temperature. A…

Strongly Correlated Electrons · Physics 2015-05-30 Yuto Tsukamoto , Yoshihiko Okamoto , Kazuyuki Matsuhira , Myung-Hwan Whangbo , Zenji Hiroi

Nuclear quadrupole resonance (NQR) measurements were performed on the heavy fermion superconductor Ce3PtIn11 with Tc = 0.32 K. The temperature dependence of both spin-lattice relaxation rate 1/T1 and NQR spectra evidences the occurrence of…

Strongly Correlated Electrons · Physics 2020-10-19 H. Fukazawa , K. Kumeda , N. Shioda , YS Lee , Y. Kohori , K. Sugimoto , D. Das , J. Blawat , D. Kaczorowski

The recent discovery of topological Kondo insulating behaviour in strongly correlated electron systems has generated considerable interest in Kondo insulators both experimentally and theoretically. The Kondo semiconductors CeT2Al10 (T=Fe,…

Strongly Correlated Electrons · Physics 2016-12-01 D. T. Adroja , Y. Muro , T. Takabatake , M. D. Le , H. C. Walker , K. A. McEwen , A. T. Boothroyd

A technique for measuring the electrical resistivity and absolute thermopower is presented for pressures up to 30 GPa, temperatures down to 25 mK and magnetic fields up to 10 T. With the examples of CeCu2Ge2 and CeCu2Si2 we focus on the…

Strongly Correlated Electrons · Physics 2007-05-23 D. Jaccard , E. Vargoz , K. Alami-Yadri , H. Wilhelm

We report the synthesis and the magnetic properties of single crystalline CeRhAl$_4$Si$_2$ and CeIrAl$_4$Si$_2$ and their non magnetic La-analogs. The single crystals of these quaternary compounds were grown using Al-Si binary eutectic as…

Strongly Correlated Electrons · Physics 2016-03-23 Arvind Maurya , R. Kulkarni , A. Thamizhavel , D. Paudyal , S. K. Dhar

Neutron and synchrotron resonant X-ray magnetic scattering (RXMS) complemented by heat capacity and resistivity measurements reveal the evolution of the magnetic structures of Fe and Ce sublattices in single crystal CeFeAsO. The RXMS of…

We have measured the electrical resistivity of cerium monochalcogenices, CeS, CeSe, and CeTe, under high pressures up to 8 GPa. Pressure dependences of the antiferromagnetic ordering temperature $T_{N}$, crystal field splitting, and the…

Strongly Correlated Electrons · Physics 2016-12-09 Y. Hayashi , S. Takai , T. Matsumura , H. Tanida , M. Sera , K. Matsubayashi , Y. Uwatoko , A. Ochiai

We have carried out neutron diffraction, muon spin relaxation (muSR) and inelastic neutron scattering investigations on a polycrystalline sample of CeOs2Al10 to investigate the nature of the phase transition observed near 29 K in the…

Strongly Correlated Electrons · Physics 2010-08-23 D. T. Adroja , A. D. Hillier , P. P. Deen , A. M. Strydom , Y. Muro , J. Kajino , W. A. Kockelmann , T. Takabatake , V. K. Anand , J. R. Stewart , J. Taylor

We measured the pressure dependence of in-plane resistivity $\rho_{ab}$ in the recently-discovered iron-based superconductor Ca$_{10}$(Ir$_{4}$As$_{8}$)(Fe$_{2-x}$Ir$_{x}$As$_{2}$)$_{5}$, which shows a unique structural phase transition in…

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