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Single crystals of the compound LaFePO were prepared using a flux growth technique at high temperatures. Electrical resistivity measurements reveal metallic behavior and a resistive transition to the superconducting state at a critical…

Superconductivity · Physics 2008-09-10 J. J. Hamlin , R. E. Baumbach , D. A. Zocco , T. A. Sayles , M. B. Maple

The discovery of superconductivity in the heavy-fermion paramagnet UTe$_2$ has attracted a lot of attention, particularly due to the reinforcement of superconductivity near pressure- and magnetic-field-induced magnetic quantum phase…

Superconductivity · Physics 2022-01-05 M. Vališka , W. Knafo , G. Knebel , G. Lapertot , D. Aoki , D. Braithwaite

We studied the anisotropy of the superconducting upper critical field $H_{\rm c2}$ in the heavy-fermion superconductor UTe$_2$ under hydrostatic pressure by magnetoresistivity measurements. In agreement with previous experiments we confirm…

75As-zero-field nuclear magnetic resonance (NMR) and nuclear quadrupole resonance (NQR) measurements are performed on CaFe2As2 under pressure. At P = 4.7 and 10.8 kbar, the temperature dependences of nuclear-spin-lattice relaxation rate…

Superconductivity · Physics 2015-05-18 S. Kawasaki , T. Tabuchi , X. F. Wang , X. H. Chen , Guo-qing Zheng

CaFe$_2$As$_2$ has been found to be exceptionally sensitive to the application of hydrostatic pressure and superconductivity has been found to exist in a narrow pressure region that appears to be at the interface between two different phase…

Superconductivity · Physics 2009-11-13 Milton S. Torikachvili , Sergey L. Bud'ko , Ni Ni , Paul C. Canfield

We present measurements of the superconducting and charge density wave critical temperatures (Tc and TCDW) as a function of pressure in the transition metal dichalchogenides 2H-TaSe2 and 2H-TaS2. Resistance and susceptibility measurements…

To explore the origin of the unusual non-bulk superconductivity with a Tc up to 49 K reported in the rare-earth-doped CaFe2As2 , the chemical composition, magnetization, specific heat, resistivity, and annealing effect are systematically…

Superconductivity · Physics 2016-03-02 L. Z. Deng , B. Lv , K. Zhao , F. Y. Wei , Y. Y. Xue , Z. Wu , C. W. Chu

We report local probe ($\mu$SR) measurements on the recently discovered tetragonal FeS superconductor which has been predicted to be electronically very similar to superconducting FeSe. Most remarkably, we find that low moment…

Uniaxial pressure applied in the b crystallographic direction perpendicular to spontaneous magnetization in heavy fermion ferromagnet URhGe strongly stimulates superconductivity in this compound. The phenomenological approach allows point…

Superconductivity · Physics 2017-09-06 V. P. Mineev

In this letter, we report that the superconductivity transition temperature in beta-Fe1.01Se increases from 8.5 to 36.7 K under applied pressure of 8.9 GPa. It then decreases at higher pressure. A dramatic change in volume is observed at…

The emergence of high transition temperature ($T_c$) superconductivity in bulk FeSe under pressure is associated with the tuning of nematicity and magnetism. However, sorting out the relative contributions from magnetic and nematic…

The effects of pressure generated in a liquid medium, clamp, pressure cell on the in-plane and c-axis resistance, temperature-dependent Hall coefficient and low temperature, magnetoresistance in CaFe2As2 are presented. The T - P phase…

Superconductivity · Physics 2009-07-28 M. S. Torikachvili , S. L. Bud'ko , N. Ni , P. C. Canfield , S. T. Hannahs

We report the discovery of pressure-induced superconductivity, with T_c=2 K, in the heavy-fermion antiferromagnet Ce_2RhIn_8, where superconductivity and magnetic order coexist over an extended pressure interval. A T-linear resistivity in…

Strongly Correlated Electrons · Physics 2007-08-07 M. Nicklas , V. A. Sidorov , H. A. Borges , P. G. Pagliuso , C. Petrovic , Z. Fisk , J. L. Sarrao , J. D. Thompson

The pressure dependencies of the magnetic and superconducting transitions, as well as that of the superconducting upper critical field are reported for single crystalline EuRbFe$_4$As$_4$. Resistance measurements were performed under…

High pressure electrical resistance and x-ray diffraction measurements have been performed on ruthenium-doped Ba(Fe0.9Ru0.1)2As2, up to pressures of 32 GPa and down to temperatures of 10 K, using designer diamond anvils under…

Superconductivity · Physics 2014-04-15 Walter Uhoya , Georgiy M. Tsoi , Yogesh K. Vohra , Athena S. Sefat , Samuel T. Weir

The local electronic and magnetic properties of superconducting FeSe have been investigated by K$\beta$ x-ray emission (XES) and simultaneous x-ray absorption spectroscopy (XAS) at the Fe K-edge at high pressure and low temperature. Our…

Superconductivity · Physics 2018-05-09 B. W. Lebert , V. Balédent , P. Toulemonde , J. M. Ablett , J. -P. Rueff

Prior to the superconducting transition at Tc = 2.3 K, Mo3Sb7 undergoes a symmetry-lowering, cubic-to-tetragonal structural transition at Ts = 53 K. We have monitored the pressure dependence of these two transitions by measuring the…

Recently, phenyl molecules have been reported to exhibit Meissner effect mainly from magnetization measurements. Realizing zero-resistivity state in these materials seems a challenge due to many practical difficulties but is required to…

Superconductivity · Physics 2018-04-10 Liu-Cheng Chen , Ren-Shu Wang , Jia Cheng , Xiao-Lin Wu , Yun Gao , Zhong-Bing Huang , Xiao-Jia Chen

We have reported the effect of pressure on the magnetization, and transport properties in the nominal composition Pr$_{2}$Ba$_{4}$Cu$_{7}$O$_{15-\delta}$ synthesized by a sol-gel technique. A reduction treatment of the as-sintered sample in…

The nature of unconventional superconductivity associated with charge density wave order in transition metal dichalcogenides is currently a debated issue. Starting from a normal state elec- tronic structure followed by a charge ordered…

Strongly Correlated Electrons · Physics 2017-01-02 S Koley