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The upper critical field is a fundamental measure of the strength of superconductivity in a material. It is also a cornerstone for the realization of superconducting magnet applications. The critical field arises because of the Copper pair…

The synthesis and detailed characterization of the noncentrosymmetric superconductor Re$_{6}$Hf using powder x-ray diffraction (XRD), magnetization, transport and thermodynamic measurements are reported. XRD confirms the crystal structure…

Superconductivity · Physics 2016-08-31 D. Singh , A. D. Hillier , A. Thamizhavel , R. P. Singh

The symmetry of the superconducting order parameter in Bechgaard salts is still unknown, though the triplet pairing is well stablished by NMR data and large upper critical field. Here we examine the upper critical field of a few candidate…

Superconductivity · Physics 2007-05-23 A. Dominguez Folgueras , K. Maki

We calculate the upper critical field in superconductors without inversion symmetry at arbitrary temperatures, in the presence of scalar impurities. Both orbital and spin (paramagnetic) mechanisms of pair breaking are considered. The…

Superconductivity · Physics 2009-11-13 K. V. Samokhin

We determine the upper critical field $\mu_0 H_{c2}(T_c)$ of non-centrosymmetric superconductor $Y_2 C_3$ using two distinct methods: the bulk magnetization M(T) and the tunnel-diode oscillator (TDO) based impedance measurements. It is…

Superconductivity · Physics 2015-03-17 H. Q. Yuan , J. Chen , J. Singleton , S. Akutagawa , J. Akimitsu

Recent measurements have shown oscillations in the upper critical field of simply connected mesoscopic superconductors. A quantitative theory of these effects is given here on the basis of a Ginzburg-Landau description. For small fields,…

Superconductivity · Physics 2009-10-28 Robert Benoist , Wilhelm Zwerger

The upper critical field $H_{c2}$ of polycrystalline samples of $Ln$O$_{0.5}$F$_{0.5}$BiS$_{2}$ ($Ln$ = La, Nd) at ambient pressure (tetragonal structure) and high pressure (HP) (monoclinic structure) have been investigated via electrical…

Superconductivity · Physics 2017-10-11 Y. Fang , C. T. Wolowiec , A. J. Breindel , D. Yazici , P. -C. Ho , M. B. Maple

We report synthesis of non-centrosymmetric BiPd single crystal by self flux method. The BiPd single crystal is crystallized in monoclinic structure with the P21 space group. Detailed SEM (Scanning Electron Microscopy) results show that the…

Superconductivity · Physics 2016-01-20 Rajveer Jha , Reena Goyal , P. Neha , V. Maurya , A. Srivastava , Anurag Gupta , S. Patnaik , V. P. S. Awana

We report the upper critical field (Bc2) in the BiCh2-based superconductors CeOBiS1.7Se0.3 and PrO0.5F0.5BiS2-xSex (x = 0, 0.3). Single crystals of CeOBiS1.7Se0.3 and PrO0.5F0.5BiS2-xSex (x = 0, 0.3) were grown using the flux method.…

Superconductivity · Physics 2022-09-22 Ryosuke Kiyama , Kazuhisa Hoshi , Yosuke Goto , Masanori Nagao , Yoshikazu Mizuguchi

Temperature variation of the lower critical field in the noncentrosymmetric superconductor $\alpha$-BiPd was probed by local magnetization measurements using Hall micromagnetometry, performed down to 0.3 K in a magnetic field applied along…

Superconductivity · Physics 2023-05-02 J. Juraszek , M. Konczykowski , D. Kaczorowski , T. Cichorek

NbRh$_{2}$B$_{2}$ crystallises in a chiral noncentrosymmetric structure and exhibits bulk type-II superconductivity below $7.46(5)$~K. Here we show that the temperature dependence of the upper critical field deviates from the behaviour…

Superconductivity · Physics 2019-08-21 D. A. Mayoh , M. J. Pearce , K. Götze , A. D. Hillier , G. Balakrishnan , M. R. Lees

Due to the competition of two anion orders, (TMTSF)2ReO4, presents a phase coexistence between semiconducting and metallic (superconducting) regions (filaments or droplets) in a wide range of pressure. In this regime, the superconducting…

Superconductivity · Physics 2009-11-13 C. V. Colin , B. Salameh , C. R. Pasquier , K. Bechgaard

In this work, we establish the bulk superconductivity of a high quality sample of monoclinic BiPd ($\alpha$-BiPd, space group P2$_1$) below 3.87 K by studying its electrical resistivity, magnetic susceptibility and heat capacity. We show…

Superconductivity · Physics 2015-05-27 Bhanu Joshi , A. Thamizhavel , S. Ramakrishnan

We studied the effects of substitution of Pd by Cu on the upper critical field of the noncentrosymmetric superconductor Li$_2$Pd$_{3-x}$Cu$_x$B, with x=0.0, 0.1 and 0.2. The upper critical field as a function of temperature was determined…

Superconductivity · Physics 2017-04-05 A. A. Castro , O. Olicón , R. Escamilla , F. Morales

In non-magnetic bulk materials, inversion symmetry protects the spin degeneracy. If the bulk crystal structure lacks a centre of inversion, however, spin-orbit interactions lift the spin degeneracy, leading to a Rashba metal whose Fermi…

We report a discovery of superconductivity with Tc = 5.5 K in Nb2PdxSe5, in which one-dimensional (1D) Nb-Se chains existing along the b-direction hybridize each other to form the conducting b-c* plane. The magnetic susceptibility and…

A perfect topological superconductor can be realized by the simultaneous existence of bulk superconductivity along with topological non-trivial surface states. In this article, we report single crystal growth of superconducting binary…

Superconductivity · Physics 2022-06-29 M. M. Sharma , N. K. Karn , Poonam Rani , R. N. Bhowmik , V. P. S. Awana

A theory of the upper critical field in a trigonal superconductor with a two-component order-parameter is developed. We demonstrate the existence of sixfold modulations of the upper critical field in the basal plane. The form of the angular…

Superconductivity · Physics 2009-11-07 P. L. Krotkov , V. P. Mineev

The upper critical field of NaFe$_{1-x}$Co$_x$As was measured from $x=0$ to $x=0.08$, with the magnetic field applied parallel ($H_{\rm c2}^\parallel$) and normal ($H_{\rm c2}^\perp$) to the planes. The data were fitted using one-band and…

Superconductivity · Physics 2014-02-11 S. Ghannadzadeh , J. D. Wright , F. R. Foronda , S. J. Blundell , S. J. Clarke , P. A. Goddard

We investigate the electronic structure of a noncentrosymmetric superconductor, BiPd using photoemission spectroscopy with multiple photon energies ranging from ultraviolet to hard x-ray. Experimental data exhibit interesting difference in…

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