Retraction: Pressure-Induced Superconducting State of Europium Metal at Low Temperatures [Phys. Rev. Lett. 102 , 197002 (2009)]

2021 ◽  
Vol 127 (26) ◽  
Author(s):  
M. Debessai ◽  
T. Matsuoka ◽  
J. J. Hamlin ◽  
J. S. Schilling ◽  
K. Shimizu
Keyword(s):  
Superconducting State ◽  
Low Temperatures

Normal and superconducting state properties of U6Fe at low temperatures and high magnetic fields

Physica B+C ◽  
1985 ◽  
Vol 135 (1-3) ◽  
pp. 81-85 ◽  
Author(s):  
L.E. Delong ◽  
G.W. Crabtree ◽  
L.N. Hall ◽  
H. Kierstead ◽  
H. Aoki ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Superconducting State ◽  
Low Temperatures ◽  
High Magnetic Fields

scholarly journals Pressure-Tuned Superconducting Dome in Chemically-Substituted κ-(BEDT-TTF)2Cu2(CN)3

Crystals ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 817
Author(s):  
Yohei Saito ◽  
Anja Löhle ◽  
Atsushi Kawamoto ◽  
Andrej Pustogow ◽  
Martin Dressel
Keyword(s):  
Superconducting State ◽  
Low Temperatures ◽  
Magnetic Order ◽  
Ambient Pressure ◽  
Mott Insulator ◽  
Quantum Spin ◽  
Spin Liquid ◽  
First Order ◽  
Insulator Metal Transition ◽  
Quantum Spin Liquid

The quantum spin liquid candidate κ-(BEDT-TTF)2Cu2(CN)3 has been established as the prime example of a genuine Mott insulator that can be tuned across the first-order insulator–metal transition either by chemical substitution or by physical pressure. Here, we explore the superconducting state that occurs at low temperatures, when both methods are combined, i.e., when κ-[(BEDT-TTF)1−x(BEDT-STF)x]2Cu2(CN)3 is pressurized. We discovered superconductivity for partial BEDT-STF substitution with x = 0.10–0.12 even at ambient pressure, i.e., a superconducting state is realized in the range between a metal and a Mott insulator without magnetic order. Furthermore, we observed the formation of a superconducting dome by pressurizing the substituted crystals; we assigned this novel behavior to disorder emanating from chemical tuning.

scholarly journals Magnetoresistance of Bi2Se3 Whiskers at Low Temperatures

2017 ◽  
Vol 18 (2) ◽  
pp. 194-197
Author(s):  
N.S. Liakh-Kaguy ◽  
A.A. Druzhinin ◽  
I.P. Ostrovskii ◽  
Yu.N. Khoverko
Keyword(s):  
Magnetic Field ◽  
Superconducting State ◽  
Low Temperatures ◽  
Kondo Effect ◽  
Doping Concentration ◽  
Electron Localization ◽  
Sharp Drop ◽  
Temperature Range ◽  
Pd Doping ◽  
Resistance Minimum

Temperature dependencies of Bi2Se3 whiskers’ resistance with Pd doping concentration of 1´1019 cm-3 where measured in temperature range 4.2 - 300 K. At temperature 5.3 K a sharp drop in the whisker resistance was found. The observed effect is likely connected with contribution of two processes such as the electron localization in the whiskers and transition in superconducting state at temperature 5.3 K, which is likely result from Pd complexes.Transversemagnetoresistance in n-type Bi2Se3 whiskers with Pd doping concentration in the vicinity to themetal-insulator transition (MIT) from metal side of the transition were studied in magnetic field 0 -10 T. For the whiskers a resistance minimum was observed at temperature about 25 K that is connected with Kondo effect.

Pressure-Induced Superconducting State of Europium Metal at Low Temperatures

2009 ◽  
Vol 102 (19) ◽  
Author(s):  
M. Debessai ◽  
T. Matsuoka ◽  
J. J. Hamlin ◽  
J. S. Schilling ◽  
K. Shimizu
Keyword(s):  
Superconducting State ◽  
Low Temperatures

scholarly journals TIME REVERSAL BREAKING SUPERCONDUCTING STATE IN THE PHASE DIAGRAM OF THE CUPRATES

2003 ◽  
Vol 17 (04n06) ◽  
pp. 614-620 ◽  
Author(s):  
G. SANGIOVANNI ◽  
M. CAPONE ◽  
S. CAPRARA
Keyword(s):  
Phase Transition ◽  
Phase Diagram ◽  
Order Phase Transition ◽  
Superconducting State ◽  
Time Reversal ◽  
Low Temperatures ◽  
Order Parameter ◽  
Andreev Reflection ◽  
Previous Analysis ◽  
Second Order Phase Transition

We review and extend a previous study1 on the symmetry of the superconducting state, stimulated by recent tunneling and Andreev reflection measurements giving robust evidences for the existence of a dx2-y2 + idxy order parameter in the overdoped regime of two different cuprates. Looking for a possible second-order phase transition from a standard dx2-y2 to a mixed and time reversal breaking state, we confirm the results of our previous analysis on La 2-x Sr x CuO 4. In the case of Y 1-y Ca y Ba 2 Cu 3 O 7-x as well, among all the allowed symmetries, the dx2 - y2 + idxy is the most favored one and the unconventional state is likely to occur in a small dome of the phase diagram located in the optimal-overdoped region and at very low temperatures.

Superconducting State in a Gallium-Doped Germanium Layer at Low Temperatures

2009 ◽  
Vol 102 (21) ◽  
Author(s):  
T. Herrmannsdörfer ◽  
V. Heera ◽  
O. Ignatchik ◽  
M. Uhlarz ◽  
A. Mücklich ◽  
...  
Keyword(s):  
Superconducting State ◽  
Low Temperatures ◽  
Germanium Layer

THE PROBLEM OF THE ELECTRICAL CONDUCTIVITY OF METALS

1931 ◽  
Vol 5 (1) ◽  
pp. 79-86 ◽  
Author(s):  
C. D. Niven
Keyword(s):  
Electrical Conductivity ◽  
Electrical Conduction ◽  
Superconducting State ◽  
Low Temperatures ◽  
Electron Configuration ◽  
Metallic Atom ◽  
The Right

It is pointed out that mathematicians in their attempts to form theories of electrical conduction, do not lay emphasis on the fact that at low temperatures resistance, as a rule, does not vanish. In those cases in which it does, it vanishes suddenly. In view of this, the question arises as to whether the right model for conductivity in a metal is visualized. It is suggested that fundamentally a metallic atom is one in which the electron configuration is incomplete.Ordinary conduction consists of a process whereby an electron jumps from one atom to another and remains with the atom it jumps to until it is in a sort of equilibrium with the motions of the electrons already on that atom. In the superconducting state, the electronic orbits of different atoms become synchronized so that when an electron leaves one atom, another electron automatically comes on to the atom to take its place. A study of the resistance-temperature curves as well as other points emphasizes the importance of structure in conductivity.

The thermal conductivity of lead at low temperatures

1958 ◽  
Vol 244 (1236) ◽  
pp. 85-100 ◽  
Keyword(s):  
Thermal Conductivity ◽  
Plastic Deformation ◽  
Single Crystals ◽  
Superconducting State ◽  
Low Temperatures ◽  
Conductivity Measurements ◽  
Conduction Electrons ◽  
Lattice Waves ◽  
Normal States ◽  
Theory Of Superconductivity

Thermal conductivity measurements have been made upon a series of lead specimens between 1 and 4° K, in the superconducting and in the normal states. Both single crystals and polycrystals were studied, and also specimens containing various added impurities. The results in the superconducting state confirm the hypothesis that below about 1·4° K the thermal current is carried entirely by lattice waves, and that these are not scattered by conduction electrons. This conclusion is based upon three pieces of evidence: (1) the thermal conductivity K s is insensitive to the amount and species of impurity; (2) it depends upon the geometry of the specimen for sufficiently thin specimens; (3) it is sensitive to plastic deformation, which can be explained if the lattice waves are scattered by dislocations. A brief discussion is given of the possible significance of these results in the theory of superconductivity.

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