scholarly journals Topological RPdBi half-Heusler semimetals: A new family of noncentrosymmetric magnetic superconductors

2015 ◽  
Vol 1 (5) ◽  
pp. e1500242 ◽  
Author(s):  
Yasuyuki Nakajima ◽  
Rongwei Hu ◽  
Kevin Kirshenbaum ◽  
Alex Hughes ◽  
Paul Syers ◽  
...  
Keyword(s):  
Rare Earth ◽  
Normal State ◽  
Magnetic Interaction ◽  
Superconducting Transition ◽  
New Family ◽  
Simultaneous Control ◽  
Band Inversion ◽  
Lattice Density ◽  
Topological Semimetals ◽  
Superconducting Pairing

We report superconductivity and magnetism in a new family of topological semimetals, the ternary half-Heusler compound RPdBi (R: rare earth). In this series, tuning of the rare earth f-electron component allows for simultaneous control of both lattice density via lanthanide contraction and the strength of magnetic interaction via de Gennes scaling, allowing for a unique tuning of the normal-state band inversion strength, superconducting pairing, and magnetically ordered ground states. Antiferromagnetism with ordering vector (½,½,½) occurs below a Néel temperature that scales with de Gennes factor dG, whereas a superconducting transition is simultaneously supressed with increasing dG. With superconductivity appearing in a system with noncentrosymmetric crystallographic symmetry, the possibility of spin-triplet Cooper pairing with nontrivial topology analogous to that predicted for the normal-state electronic structure provides a unique and rich opportunity to realize both predicted and new exotic excitations in topological materials.

scholarly journals Dichotomy in the T -linear resistivity in hole-doped cuprates

2011 ◽  
Vol 369 (1941) ◽  
pp. 1626-1639 ◽  
Author(s):  
N. E. Hussey ◽  
R. A. Cooper ◽  
Xiaofeng Xu ◽  
Y. Wang ◽  
I. Mouzopoulou ◽  
...  
Keyword(s):  
Normal State ◽  
Low Temperatures ◽  
Temperature Limit ◽  
Anomalous Scattering ◽  
Superconducting Transition ◽  
Pairing Mechanism ◽  
Marked Contrast ◽  
Superconducting Pairing ◽  
Loss Of Coherence ◽  
Doping Range

From analysis of the in-plane resistivity ρ ab ( T ) of La 2− x Sr x CuO 4 , we show that normal state transport in overdoped cuprates can be delineated into two regimes in which the electrical resistivity varies approximately linearly with temperature. In the low-temperature limit, the T -linear resistivity extends over a very wide doping range, in marked contrast to expectations from conventional quantum critical scenarios. The coefficient of this T -linear resistivity scales with the superconducting transition temperature T c , implying that the interaction causing this anomalous scattering is also associated with the superconducting pairing mechanism. At high temperatures, the coefficient of the T -linear resistivity is essentially doping independent beyond a critical doping p crit =0.19 at which the ratio of the two coefficients is maximal. Taking our cue from earlier thermodynamic and photoemission measurements, we conclude that the opening of the normal-state pseudogap at p crit is driven by the loss of coherence of anti-nodal quasi-particles at low temperatures.

Electron Irradiation of YBa2Cu3O7 at low Temperatures

1987 ◽  
Vol 99 ◽  
Author(s):  
B. Stritzker ◽  
W. Zander ◽  
F. Dworschak ◽  
U. Poppe ◽  
K. Fischer
Keyword(s):  
Transition Temperature ◽  
Electron Irradiation ◽  
Normal State ◽  
Low Temperatures ◽  
Superconducting Transition Temperature ◽  
Superconducting Transition ◽  
Radiation Induced ◽  
State Resistance ◽  
Normal State Resistance

ABSTRACTBulk samples of YBa2Cu3O7−x have been homogenously irradiated with 3 MeV electrons at temperatures below 20 K. Whereas the superconducting transition temperature, Tc, drops dramatically with increasing dose the width of the transition remains unchanged (Δ Tc ≤ 1.5 K). The normal state resistance at 100 K increases substantially during the electron irradiation. Several irreproducible experiments can be interpreted with a radiation induced, unstable increase of Tc.

Epitaxial Growth of Rare Earths on Rare Earth Fluorides and Rare Earth Fluorides on Rare Earths: Two New Epitaxial Systems Accessed by MBE

1987 ◽  
Vol 103 ◽  
Author(s):  
R. F. C. Farrow ◽  
S. S. P. Parkin ◽  
M. Lang ◽  
K. P. Roche
Keyword(s):  
Rare Earth ◽  
Rare Earths ◽  
Rare Earth Metal ◽  
Basal Plane ◽  
Earth Metal ◽  
Magnetic Ordering ◽  
Metal Films ◽  
Squid Magnetometry ◽  
New Family ◽  
Rare Earth Fluorides

ABSTRACTWe report two new epitaxial systems, prepared by MBE: basal plane epitaxy of the rare earth metal Dy onto LaF3 films and vice versa. SQUID magnetometry studies indicate that buried epitaxial Dy films, of ∼300Å thick, order ferromagnetically at similar temperatures to bulk Dy crystals.These epitaxial systems are one member of a new family of epitaxial systems of basal plane epitaxy of rare earth metals on rare earth fluorides and vice versa. Such systems may be used to probe the effects of strain and dimensionality on magnetic ordering in rare earth metal films and multilayers.

scholarly journals Magnetic Interaction between Surface-Engineered Rare-Earth Atomic Spins

2012 ◽  
Vol 2 (2) ◽  
Author(s):  
Chiung-Yuan Lin ◽  
Jheng-Lian Li ◽  
Yao-Hsien Hsieh ◽  
Keng-Liang Ou ◽  
B. A. Jones
Keyword(s):  
Rare Earth ◽  
Magnetic Interaction ◽  
Atomic Spins

Improving the Cd2+ detection capability of a new anionic rare earth metal–organic framework based on a [RE6(μ3-OH)8]10+ secondary building unit: an ion-exchange approach towards more efficient sensors

2020 ◽  
Vol 5 (6) ◽  
pp. 1077-1087 ◽  
Author(s):  
Nikos Panagiotou ◽  
Kasiani Evangelou ◽  
Athanasia Psalti ◽  
Nektaria Varnava ◽  
Giasemi K. Angeli ◽  
...  
Keyword(s):  
Rare Earth ◽  
Ion Exchange ◽  
Metal Ion ◽  
Metal Organic Framework ◽  
Earth Metal ◽  
Secondary Building Unit ◽  
Exchange Method ◽  
Building Unit ◽  
Ion Sensing ◽  
New Family

A new family of microporous anionic rare earth (RE) MOFs based on a hexanuclear (RE)6 secondary building unit along with a post-synthetic ion-exchange method to enhance the metal ion sensing capability of anionic MOFs are reported.

UNCONVENTIONAL SUPERCONDUCTIVITY IN UPt3: FREQUENCY DEPENDENT AC SUSCEPTIBILITY

1993 ◽  
Vol 07 (01n03) ◽  
pp. 18-21
Author(s):  
Z. KOZIOL ◽  
J. J. M. FRANSE ◽  
A. A. MENOVSKY
Keyword(s):  
Normal State ◽  
Surface Resistance ◽  
Skin Effect ◽  
Ac Susceptibility ◽  
Response Characteristic ◽  
Complex Conductivity ◽  
Unconventional Superconductivity ◽  
Superconducting Transition ◽  
Good Qualitative Agreement ◽  
Unconventional Superconductor

A method has been developed for measuring and analysing the complex ac susceptibility of a metal undergoing a superconducting transition, in case there exists an interplay between the normal-state skin-effect and the response characteristic for the superconducting state. For the unconventional superconductor UPt 3, the study of the temperature and frequency dependence of the complex conductivity close to T c has resulted in predictions for the surface resistance and the radio-frequency susceptibility which are in a good qualitative agreement with published experimental results.

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