Superconductivity in Heavy Fermion Compounds

Thalmeier, Peter; Zwicknagl, Gertrud; Stockert, O.; Sparn, G.; Steglich, F.

doi:10.1007/3-540-27294-1_3

Cited by 30 publications

(44 citation statements)

References 172 publications

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“…In CeCu 2 Si 2 , elastic magnetic scattering intensity reaches a maximum at T c below which it drops to zero, an indication that superconductivity expels magnetic order such that they do not coexist well below T c . 55) On the other hand, elastic magnetic intensity in BaFe 1:92 Co 0:08 As 2 decreases only by about 6% below T c , which is more similar to what is found in CeCo(In 0:9925 Cd 0:0075 ) 5 . In this sample of Co-doped BaFe 2 As 2 , the ''missing'' elastic intensity reappears as an inelastic spin resonance.…”

Section: Cecoinsupporting

confidence: 70%

Progress in Heavy-Fermion Superconductivity: Ce115 and Related Materials

2012

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Ce115 and related Ce compounds are particularly suited to detailed studies of the interplay of antiferromagnetic order, unconventional superconductivity and quantum criticality due to their availability as high quality single crystals and their tunability by chemistry, pressure and magnetic field. Neutron-scattering, NMR and angle-resolved thermodynamic measurements have deepened the understanding of this interplay. Very low temperature experiments in pure and lightly doped CeCoIn 5 have elaborated the FFLO-like magnetic state near the field-induced quantum-critical point. New, related superconducting materials have broadened the phase space for discovering underlying principles of heavy-fermion superconductivity and its relationship to nearby states.

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Section: Cecoinsupporting

confidence: 70%

Progress in Heavy-Fermion Superconductivity: Ce115 and Related Materials

2012

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“…Quantum fluctuations and competing interactions in quantum many body systems lead to unusual and exciting properties of strongly correlated materials such as quantum magnetism [3], high temperature superconductivity [4], heavy fermion behavior [5], and topological quantum order [6]. The same strong interactions make accurate analytical treatments hard and direct numerical simulations are essential to increase our understanding of the unusual properties of these systems.…”

Section: Introductionmentioning

confidence: 99%

The ALPS project release 1.3: Open-source software for strongly correlated systems

Albuquerque

Alet

Corboz

et al. 2007

Journal of Magnetism and Magnetic Materials

664

436

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We present release 1.3 of the ALPS (Algorithms and Libraries for Physics Simulations) project, an international open source software project to develop libraries and application programs for the simulation of strongly correlated quantum lattice models such as quantum magnets, lattice bosons, and strongly correlated fermion systems. Development is centered on common XML and binary data formats, on libraries to simplify and speed up code development, and on full-featured simulation programs. The programs enable non-experts to start carrying out numerical simulations by providing basic implementations of the important algorithms for quantum lattice models: classical and quantum Monte Carlo (QMC) using non-local updates, extended ensemble simulations, exact and full diagonalization (ED), as well as the density matrix renormalization group (DMRG). Changes in the new release include a DMRG program for interacting models, support for translation symmetries in the diagonalization programs, the ability to define custom measurement operators, and support for inhomogeneous systems, such as lattice models with traps. The software is available from our web server at http://alps.comp-phys.org/.

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“…In the undoped state, three-dimensional (3D) long range ordering occurs below a Néel temperature T N of about several hundreds Kelvin [1,2], due to a small additional magnetic exchange J ′ between the layers. At the magnetic quantum phase transition of some heavy-fermion systems, the appearance of superconductivity is believed to arise from an enhancement of the magnetic fluctuations [3,4]. Hence, a better understanding of the magnetic properties of the high-T C cuprates could be of primary importance to elucidate why superconductivity develops in these systems [5].…”

Section: Introductionmentioning

confidence: 99%

Heat capacity and magnetic phase diagram of the low-dimensional antiferromagnet Y₂BaCuO₅

Knafo

Meingast

Inaba

et al. 2008

J. Phys.: Condens. Matter

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Abstract.A study by specific heat of a polycrystalline sample of the low-dimensional magnetic system Y 2 BaCuO 5 is presented. Magnetic fields up to 14 T are applied and permit to extract the (T ,H) phase diagram. Below µ 0 H * ≃ 2 T, the Néel temperature, associated with a three-dimensional antiferromagnetic long-range ordering, is constant and equals T N = 15.6 K. Above H * , T N increases linearly with H and a field-induced increase of the entropy at T N is related to the presence of an isosbestic point at T X ≃ 20 K, where all the specific heat curves cross. A comparison is made between Y 2 BaCuO 5 and the quasi-two-dimensional magnetic systems BaNi 2 V 2 O 8 , Sr 2 CuO 2 Cl 2 , and Pr 2 CuO 4 , for which very similar phase diagrams have been reported. An effective field-induced magnetic anisotropy is proposed to explain these phase diagrams.

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Superconductivity in Heavy Fermion Compounds

Cited by 30 publications

References 172 publications

Progress in Heavy-Fermion Superconductivity: Ce115 and Related Materials

Progress in Heavy-Fermion Superconductivity: Ce115 and Related Materials

The ALPS project release 1.3: Open-source software for strongly correlated systems

Heat capacity and magnetic phase diagram of the low-dimensional antiferromagnet Y₂BaCuO₅

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Superconductivity in Heavy Fermion Compounds

Cited by 30 publications

References 172 publications

Progress in Heavy-Fermion Superconductivity: Ce115 and Related Materials

Progress in Heavy-Fermion Superconductivity: Ce115 and Related Materials

The ALPS project release 1.3: Open-source software for strongly correlated systems

Heat capacity and magnetic phase diagram of the low-dimensional antiferromagnet Y2BaCuO5

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Heat capacity and magnetic phase diagram of the low-dimensional antiferromagnet Y₂BaCuO₅