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Superconductivity in strongly correlated electron systems frequently emerges in proximity to another broken symmetry. In heavy-electron superconductors, the nearby ordered state most commonly is magnetism, and the so-called Ce115…

Superconductivity · Physics 2015-06-11 Tuson Park , Xin Lu , Han-Oh Lee , J. D. Thompson

Polycrystalline Sr1-xNdxFeAsF samples were prepared at various Nd-doping levels using both a stoichiometric mixture of the starting materials and in slight excess amounts of FeAs. Susceptibility and resistivity of the samples were studied…

Superconductivity · Physics 2010-03-31 S. V. Chong , T. Goya , H. Yamaguchi , K. Kadowaki

We report on detailed ac calorimetry measurements under high pressure and magnetic field of CeRhIn5. Under hydrostatic pressure the antiferromagnetic order vanishes near p_c*=2 GPa due to a first order transition. Superconductivity is found…

Strongly Correlated Electrons · Physics 2009-11-11 G. Knebel , D. Aoki , D. Braithwaite , B. Salce , J. Flouquet

We investigated the magnetic structure of the heavy fermion compound CePt$_2$In$_7$ below $T_N~=5.34(2)$ K using magnetic resonant X-ray diffraction at ambient pressure. The magnetic order is characterized by a commensurate propagation…

Strongly Correlated Electrons · Physics 2017-08-16 Nicolas Gauthier , Didier Wermeille , Nicola Casati , Hironori Sakai , Ryan E. Baumbach , Eric D. Bauer , Jonathan S. White

We report the discovery of pressure-induced superconductivity in a semimetallic magnetic material CeTe$_{1.82}$. The superconducting transition temperature $T_{SC}$ = 2.7 K (well below the magnetic ordering temperatures) under pressure ($>$…

Strongly Correlated Electrons · Physics 2009-11-07 M. H. Jung , A. Alsmadi , H. C. Kim , Yunkyu Bang , K. H. Ahn , K. Umeo , A. H. Lacerda , H. Nakotte , H. C. Ri , T. Takabatake

We have performed powder neutron diffraction on the new superconductor, CeNi$_{0.8}$Bi$_2$ with a superconducting transtion temperature $T_\textrm{c} \sim$ 4.2 K. The structural parameters of this compound at room temperature are determined…

Superconductivity · Physics 2015-05-27 K. Kodama , S. Wakimoto , N. Igawa , S. Shamoto , H. Mizoguchi , H. Hosono

The elastic neutron scattering experiments were carried out on the solid solutions CeRh_{1-x}Co_xIn_5 to clarify the nature of the antiferromagnetic (AF) state in the vicinity of the quantum critical point (QCP): x_c ~0.8. The…

Strongly Correlated Electrons · Physics 2008-06-04 M. Yokoyama , N. Oyama , H. Amitsuka , S. Oinuma , I. Kawasaki , K. Tenya , M. Matsuura , K. Hirota , T. J. Sato

The magnetic structure of Ce0.9La0.1RhIn5 is measured using neutron diffraction. It is identical to the incommensurate transverse spiral for CeRhIn5, with a magnetic wave vector q_M=(1/2,1/2,0.297), a staggered moment of 0.38(2)Bohr…

Strongly Correlated Electrons · Physics 2009-11-07 Wei Bao , A. D. Christianson , P. G. Pagliuso , J. L. Sarrao , J. D. Thompson , A. H. Lacerda , J. W. Lynn

The Ce compounds CeCoIn$_5$ and CeRhIn$_5$ are ideal model systems to study the competition of antiferromagnetism (AF) and superconductivity (SC). Here we discuss the pressure--temperature and magnetic field phase diagrams of both…

We investigate the properties of the coexistence phase of itinerant antiferromagnetism and nodal $d$-wave superconductivity (Q-phase) discovered in heavy fermion CeCoIn5 under applied magnetic field. We solve the minimal model that includes…

Superconductivity · Physics 2015-12-18 Johannes. H. J. Martiny , Maria N. Gastiasoro , I. Vekhter , Brian M. Andersen

We present a ^{115}In NMR study of the quasi two-dimensional heavy-fermion superconductor CeCoIn_5 believed to host a Fulde-Ferrel-Larkin-Ovchinnkov (FFLO) state. In the vicinity of the upper critical field and with a magnetic field applied…

Superconductivity · Physics 2009-11-10 K. Kakuyanagi , M. Saito , K. Kumagai , S. Takashina , M. Nohara , H. Takagi , Y. Matsuda

The work presents experimental results of precision magnetoresistance dr(H,T) measurements obtained for canonical heavy fermion compounds CeAl2, CeAl3, CeCu6 and substitutional solid solutions CeCu6-xAux (x=0.1 and 0.2) and Ce(Al0.95M0.05)2…

Strongly Correlated Electrons · Physics 2007-05-23 N E Sluchanko , A V Bogach , V V Glushkov , S V Demishev , N A Samarin , G S Burhanov , O D Chistiakov , D N Sluchanko

Magnetic susceptibility, electrical resistivity and heat capacity data for single crystals of Ce(Rh,Ir)1-x(Co,Ir)xIn5 (0 < x < 1) have allowed us to construct a detailed phase diagram for this new family of heavy-fermion…

Strongly Correlated Electrons · Physics 2007-05-23 P. G. Pagliuso , R. Movshovich , A. D. Bianchi , M. Nicklas , N. O. Moreno , J. D. Thompson , M. F. Hundley , J. L. Sarrao , Z. Fisk

We report the results of de-Haas-van-Alphen (dHvA) measurements in Cd doped CeCoIn$_5$ and LaCoIn$_5$. Cd doping is known to induce an antiferromagnetic order in the heavy fermion superconductor CeCoIn$_5$, whose effect can be reversed with…

Strongly Correlated Electrons · Physics 2015-05-18 C. Capan , Y-J. Jo , L. Balicas , R. G. Goodrich , J. F. DiTusa , I. Vekhter , T. P. Murphy , A. D. Bianchi , L. D. Pham , J. Y. Cho , J. Y. Chan , D. P. Young , Z. Fisk

We report neutron diffraction experiments performed in the tetragonal antiferromagnetic heavy fermion system CeRhIn$_{5-x}$Sn$_{x}$ in its ($x$, $T$) phase diagram up to the vicinity of the critical concentration $x_c$ $\approx$ 0.40, where…

Strongly Correlated Electrons · Physics 2015-06-19 S. Raymond , J. Buhot , E. Ressouche , F. Bourdarot , G. Knebel , G. Lapertot

The CeTIn5 superconductors (T=Co, Rh, or Ir) have generated great interest due to their relatively Tc's, NFL behavior, and their proximity to AF order and quantum critical points. In contrast to small changes with the T-species, electron…

Strongly Correlated Electrons · Physics 2015-05-13 C. H. Booth , E. D. Bauer , A. D. Bianchi , F. Ronning , J. D. Thompson , J. L. Sarrao , Jung Young Cho , Julia Y. Chan , C. Capan , Z. Fisk

We report a new family of Ce-based heavy-fermion compounds whose electronic specific heat coefficients range from about 400 to over 700 mJ/mole Ce-K2. Crystal in this family form as CenTmIn3n+2m, where T=Rh or Ir, n=1 or 2, and m=1, with a…

In four classes of materials, the layered copper-oxides, organics, iron-pnictides and heavy-fermion compounds, an unconventional superconducting state emerges as a magnetic transition is tuned toward absolute zero temperature, that is,…

Superconductivity · Physics 2014-07-01 S. Seo , Xin Lu , J. -X. Zhu , R. R. Urbano , N. Curro , E. D. Bauer , V. A. Sidorov , L. D. Pham , Tuson Park , Z. Fisk , J. D. Thompson

We report our results on two new ternary intermetallic compounds Pr$_{2}$Pd$_{3}$Ge$_{5}$ and Pr$_{2}$Rh$_{3}$Ge$_{5}$ based on magnetic susceptibility, magnetization, specific heat, resistivity and magnetoresistance data. These compounds…

Strongly Correlated Electrons · Physics 2009-11-13 V. K. Anand , Z. Hossain , C. Geibel

We present NMR data in the normal and superconducting states of CeCoIn$_5$ for fields close to $H_{\rm c2}(0)=11.8$ T in the $ab$ plane. Recent experiments identified a first-order transition from the normal to superconducting state for $H>…

Strongly Correlated Electrons · Physics 2013-05-29 B. -L. Young , R. R. Urbano , N. J. Curro , J. D. Thompson , J. L. Sarrao , A. B. Vorontsov , M. J. Graf