Doping experiments in heavy fermion superconductors

by Jung Soo Kim

Written in English
Cover of: Doping experiments in heavy fermion superconductors | Jung Soo Kim
Published: Pages: 172 Downloads: 68
Share This

Edition Notes

Statementby Jung Soo Kim
The Physical Object
Paginationvi, 172 leaves :
Number of Pages172
ID Numbers
Open LibraryOL24592869M
OCLC/WorldCa26581754

  Conceived as the definitive reference in a classic and important field of modern physics, this extensive and comprehensive handbook systematically reviews the basic physics, theory and recent advances in the field of superconductivity. Leading researchers, including Nobel laureate, describe the state of the art in conventional and unconventional superconductors at . Here we use inelastic neutron scattering to demonstrate that the resonance in the heavy fermion superconductor Ce 1−x Yb x CoIn 5 with x=0, and , and T c ≈, and K, respectively (Methods section and Supplementary Fig. 1) 4,12,33, has a dominant ring-like upward dispersion that is robust against Yb-doping and the Cited by: 9. temperature, magnetic field, doping and current orientation with respect to the crystal axes, to investigate the superconducting and normal states of this compound. In particu-lar the aim of this study was to determine the gap symmetry of CeIrIn5, a heavy-fermion superconductor with .   The heavy-fermion metals offer an interesting playground where magnetism and superconductivity can both compete and coexist. In these systems, the hybridized f electrons are not only responsible for long-range magnetic order, but are also involved in by:

An intrinsic brittleness of oxide cuprates, the layered anisotropic structure and the supershort coherence length are the main features of HTS defining their properties. Taking into account these features, the researching of HTS microstructure and properties is presented, and also the possibilities of optimization of the preparation techniques and superconducting compositions .   In high-transition-temperature (T c) superconductivity, charge doping is a natural tuning parameter that takes copper oxides from the antiferromagnet to the superconducting region. In the metallic state above T c, the standard Landau's Fermi-liquid theory of metals as typified by the temperature squared (T 2) dependence of resistivity appears to break down. Cited by:   "This work provides the first evidence that similar processes bring about superconductivity in the canonical heavy-fermion system YRS." Electrons fall within a quantum category called fermions. Superconductivity is the set of physical properties observed in certain materials, wherein electrical resistance vanishes and from which magnetic flux fields are expelled. Any material exhibiting these properties is a an ordinary metallic conductor, whose resistance decreases gradually as its temperature is lowered even down to near absolute zero, a superconductor .

Purchase Heavy-Fermion Systems, Volume 2 - 1st Edition. Print Book & E-Book. ISBN , Considerable attention is devoted to high-Tc superconductivity, novel superconductivity, including triplet pairing in the ruthenates, novel superconductors, such as heavy-Fermion metals and organic materials, and also granular superconductors. What are superconductors used for? Wiki User 'Doping experiments on magnetic heavy fermion superconductors' -- subject(s): Superconductors What is the subplot in the book . Antiferromagnetism in metals: from the cuprate superconductors to the heavy fermion materials Subir Sachdev1, Max A Metlitski2 and Matthias Punk1 1 Department of Physics, Harvard University, Cambridge MA , USA 2 Kavli Institute for Theoretical Physics, University of California, Santa Barbara, CA , USA Abstract. The critical theory of the .

Doping experiments in heavy fermion superconductors by Jung Soo Kim Download PDF EPUB FB2

Title: Doping experiments in heavy fermion superconductors Experimental results are presented on the doping effects both in the normal state and the superconducting state of the heavy fermion superconductors UBe[sub 13], CeCu[sub 2]Si[sub 2], and UPt[sub 3].

Experimental results are presented on the doping effects both in the normal state and the superconducting state of the heavy fermion superconductors UBe _{rm 13}, CeCu_2 Si_2, and UPt_3. The objective has been to understand the origin of heavy fermion nature and the unusual superconductivity in these by: 1.

doping experiments in heavy fermion superconductors by jung soo kim a dissertation presented to the graduate school of the university of florida in partial fulfillment of the requirements for the degree of doctor of philosophy university of florida university of florida ubraries acknowledgments i have been very fortunate in having professor g.r.

DOPING EXPERIMENTS ON MAGNETIC HEAVY FERMION SUPERCONDUCTORS By WEONWOO KIM A DISSERTATION PRESENTED TO THE GRADUATE SCHOOL OF THE UNIVERSITY OF FLORIDA IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF DOCTOR OF PHILOSOPHY ACKNOWLEDGMENTS I wish to express my.

Further, point-contact and tunnelling spectroscopy and Josephson experiments are addressed. Current understanding is reviewed from the experimental point of view. With an appendix offering five tables with Doping experiments in heavy fermion superconductors book references that summarize the present results from ambient pressure heavy-fermion and noncopper-oxide superconductors, the.

Here we use inelastic neutron scattering to demonstrate that the resonance in the heavy fermion superconductor Ce 1−xYb xCoIn 5 with x = 0, and T c ≈K, respectively [Methods section and Supplementary Figure 1] [4, 12, 33] has a dominant ring-like upward dispersion that is robust against Yb-doping and the concomitantCited by: 9.

Routes to heavy-fermion superconductivity F Steglich 1, O Stockert, S Wirth, C Geibel 1, H Q Yuan 2, S Kirchner 1,3 and Q Si 4 1Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Str. 40, Dresden, Germany 2Department of Physics and Center for Correlated Matter, Zhejiang University, Hangzhou, ZhejiangChina 3Max Planck Institute for.

Antiferromagnetic order and spin dynamics in iron-based superconductors Doping experiments in heavy fermion superconductors book oxide and heavy fermion superconductors and the common features of spin excitations in experiments designed to study the doping evolution of spin excitations were carried out only on the La2−xSr.

doping. The family of so-called Ce heavy-fermion materials, CeRhIn 5, CeCoIn 5 and CeIrIn 5,[14] are additionally similar to the curpates and iron arsenides in that they crystallize in a tetragonal structure, which is built from a magnetic layer of CeIn 3 units analogous to the CuO 2 planes in cuprates and Fe-As planes in the arsenides.

heavy-fermion compounds, including superconductors, anti-ferromagnets (AFMs), and insulators have been discovered.

can be tuned through a quantum phase transition into a heavy-fermion state by pressure, magnetic fields, or chemical doping (von L¨ohneysen et al., including books on the Kondo effect and heavy fermions (Hewson, ; Cox. superconductors, but the AFM nFL FL regimes surrounding the SC phase are quite similar.

The heavy fermion superconductors, with maximum Tc yet another order of magnitude lower, also show phase diagrams with considerable similarities, although the phase diagrams for various of the systems differ in their details.

Additionally, magnetism and superconductivity interplay strongly in heavy fermion superconductors. The understanding of anisotropic superconductivity and magnetism is a challenging problem in solid state and condensed matter physics. This book will tackle all these topics and more. Sample Chapter(s).

It is widely believed that spin fluctuations in the vicinity of an antiferromagnetic QCP are important for superconductivity in many heavy-fermion, organic, and pnictide superconductors (2, 6), leading to the ubiquitous phenomenon of a superconducting dome surrounding a by:   In actinide or rare-earth heavy-fermion materials, this interaction yields itinerant electrons having an effective mass about times (or more) the bare electron mass.

Moreover, the itinerant electrons in UPd 2 Al 3 are found to be superconducting well below the magnetic ordering temperature 1,2 of this compound, Cited by: Doping experiments in heavy fermion superconductors Miscellaneous Kim, J. Experimental results are presented on the doping effects both in the normal state and the superconducting state of the heavy fermion superconductors UBe[sub.

In spite of progress, the heavy-fermion problem and heavy-fermion superconductivity in particular remain challenges to experiment and theory. Though heavy-fermion behavior has been found in several structure types, it appears that, like conventional BCS superconductivity, heavy-fermion superconductivity may be favored by particular crystallographic structures.

Historical overview. Heavy fermion behavior was discovered by K. Andres, J.E. Graebner and H.R. Ott inwho observed enormous magnitudes of the linear specific heat capacity in CeAl While investigations on doped superconductors led to the conclusion that the existence of localized magnetic moments and superconductivity in one material was incompatible, the.

scattering to demonstrate that the resonance in the heavy fermion superconductor Ce 1 xYb xCoIn 5 with x¼0, and has a ring-like upward dispersion that is robust against Yb-doping. By comparing our experimental data with a random phase approximation calculation using the electronic structure and the momentum dependence of the d x2 y2-wave.

Cadmium doping the heavy-fermion superconductor CeCoIn 5 at the percent level acts as an electronic tuning agent, sensitively shifting the balance between superconductivity and antiferromagnetism and opening new ambient-pressure phase space in the study of heavy-fermion ground states.

DOI: /PhysRevLett PACS numbers: +a. In the cuprates, iron pnictides, and heavy fermion superconductors, the change in magnetic exchange energy in the superconducting state due to the resonance mode is sufficient to account for the superconductivity condensation energy [71,75,76].

Here we present scanning tunnelling microscopy studies of the recently discovered heavy-fermion superconductor UTe2, which has a.

In the present article, the use of slave-boson mean-field theory of the extended Anderson lattice model has been generalized to the Nambu space. The Green's functions of heavy fermion superconductors (HFS) have been obtained.

The high sensitivity of the d-wave pairing HFS to the nonmagnetic impurities has been studied. The obtained results are in good agreement with the recent experiments Author: Shi Daning, Shi Daning, Li Zhengzhong.

Among the body centered tetragonal systems, K 2 NiF 4 - and ThCr 2 Si 2 -type structures have been widely investigated. The former type of structures are found for many 3 d compounds which form quasi-two-dimensional magnetic systems, whereas the latter type of structure is common for heavy fermion superconductors.

Recent trends in heavy-fermion physics Applications to heavy-fermion superconductors and to the new high-T/sub c/ materials are discussed. which makes it an ideal candidate for doping. Even though the T c of heavy fermion superconductors is usually much lower than cuprate or iron-based superconductors, the ratio is much higher than BCS superconductors.

This is because the effective Fermi temperature T F is much smaller, on the order of the coherence temperature, compared to ~10 4 K in simple by: During the Koln meeting (August), Irdia was chosen as the venue for the next International Conference on Valence Fluctuations.

lhis was in recognition ard appreciation of the work done, both experimental ard theoretical, by the Irdian scientists in.

Quantum phase transitions in heavy-fermion metals. (A) Suppression of antiferromagnetic order through pressure in CePd 2Si 2. T N is the Néel transition temperature, and the corresponding antiferromagnetic order is illustrated in the inset.

At the boundary of the antiferromagnetism, a phase of unconventional superconductivity by: Pairing symmetry and two-fluid behavior in the heavy fermion superconductor CeCoIn5 Stephanie Law (Dated: Decem ) CeCoIn5 has recently been the subject of much controversy regarding the symme- try of its order parameter as well as the possibility of multi-band superconductivity.

The Editor, Nobel Laureate J. Robert Schrieffer, and Associate Editor James S. Brooks, have produced a unified, coherent work providing a global view of high-temperature superconductivity covering the materials, the relationships with heavy-fermion and organic systems, and the many formidable challenges that remain.

scattering to demonstrate that the resonance in the heavy fermion superconductor Ce 1 xYb xCoIn 5 with x¼0, and has a ring-like upward dispersion that is robust against Yb-doping. By comparing our experimental data with a random phase approximation calculation using the electronic structure and the momentum dependence of the d x2 y2-waveCited by: 1.

from book Magnetism and Superconductivity in carried out on the Heavy Fermion Superconductor, URu2Si2. the transition temperature with oxygen doping. The experiments have revealed the.Heavy fermion superconductors are a type of unconventional superconductor.

The first heavy fermion superconductor, CeCu 2 Si 2, was discovered by Frank Steglich in Since then over 30 heavy fermion superconductors were found (in materials based on Ce, U), with a critical temperature up to K (in CeCoIn 5).thousands of times larger in heavy-fermions than in simple metals.

The recent discovery of heavy-fermion behavior in CeMIn 5, where M = Co, Ir, and Rh, has stimulated research on these compounds.

CeCoIn 5 and CeIrIn 5 have been characterized as low-temperature superconductors with large, easily definable Sommerfeld coefficient [].