superconducting order parameter

We here describe, for the first time, that the superconductor NaAlSi has a topological nontrivial nodal-line band structure. we obtain for the correlation function, where now , and is the ©2020 American Physical Society. : Phys. : Quantum Liquids: Bose condensation and Cooper pairing in condensed-matter systems. Lett. 51, 1998–2000 (1974), Paulson, D., Kojima, H., Wheatley, J.C.: Phys. Sun, V. Süß, M. Schmidt, U. Schwarz, E. Pippel, P. Werner, R. Hillebrand, T. Förster, E. Kampert, S. Parkin, R. J. Cava, C. Felser, B. Yan, and S. A. Medvedev, “, Z. Guguchia, F. von Rohr, Z. Shermadini, A. T. Lee, S. Banerjee, A. R. Wieteska, C. A. Marianetti, B. The electron density, \(<|u_{k}(0)|^{2}>_{E_{F}}\), will vary as the strength of the applied magnetic field used to do the measurement is varied. Neighbor, and C. Shiffman, “, Quasiparticle phenomenology for thermodynamics of strong-coupling superconductors, 46. In the course of the advent of topological insulators, several classes of nontrivial topological semimetals have been proposed and experimentally sought after: Weyl semimetals, Dirac semimetals, and nodal-line semimetals. field, and by replacing the ``magnetic'' coupling g by the H. Tütüncü, E. Karaca, and G. Srivastava, “, Theoretical investigation of superconductivity in ternary silicide NaAlSi with layered diamond-like structure, 30. the equivalent form, We will be working in the low-temperature phase of the Ginzburg-Landau Wen, K. Page, C. J. Fennie, K. M. Shen, and T. M. McQueen, “, L. Aggarwal, A. Gaurav, G. S. Thakur, Z. Haque, A. K. Ganguli, and G. Sheet, “, L. M. Schoop, L. S. Xie, R. Chen, Q. D. Gibson, S. H. Lapidus, I. Kimchi, M. Hirschberger, N. Haldolaarachchige, M. N. Ali, C. A. Belvin, T. Liang, J. B 87(R), 081104 (2013), Yasui, Y., Lahabi, K., Anwar, M.S., Nakamura, Y., Yonezawa, S., Terashima, T., Aarts, J., Maeno, Y.: Phys. S. Kuroiwa, H. Kawashima, H. Kinoshita, H. Okabe, and J. Akimitsu, “, Superconductivity in ternary silicide NaAlSi with layered diamond-like structure, 28. A1.4 that the integral of Tr(d(r) ⋅d‡(r)) over r (or of Tr(d(k) ⋅d‡(k)) over k) is unity. Referring back to the first representation (111) of G. M. Luke, Y. Fudamoto, K. Kojima, M. Larkin, J. Merrin, B. Nachumi, Y. Uemura, Y. Maeno, Z. Mao, Y. Mori, Time-reversal symmetry-breaking superconductivity in Sr, 40. 99, 197002 (2007), Vakaryuk, V., Leggett, A.J. would like to thank X. Cai, R. Cava, S-K. Chung, H. Kawano-Furukawa, V. B. Geshkenbein, K. Hasselbach, W. Huang, J. K. Jain, C. Kallin, H-Y. Lett. It has been argued that the existence of a tetracritical point for all field orientations eliminates the two-dimensional (2D) orbital representations coupled to a symmetry-breaking field (SBF) as a viable theory of these phases and favours either a theory based on two primary order parameters belonging to different irreducible representations that are accidentally degenerate, as described by Chen and Garg 1993, or a spin-triplet, orbital one-dimensional representation with non spin-orbit coupling in the pairing channel, as described by Machida and Ozaki 1991. Rev. G. Bian, T.-R. Chang, R. Sankar, S.-Y. The. H. Shapourian, Y. Wang, and S. Ryu, “, Topological crystalline superconductivity and second-order topological superconductivity in nodal-loop materials, Topological insulators and superconductors, 13. : PhD thesis. Therefore, we have carried out ZF-, The temperature dependence of the muon spin depolarization rate, C. Probing the nonuniform field distribution in the vortex state, In order to investigate the symmetry of the superconducting gap, we note that, To proceed with a quantitative analysis, we consider the local (London) approximation (, The results of this analysis are presented in, Even though a phonon-driven mechanism for superconductivity appears likely, and from there a conventional, In summary, we have reported on a detailed analysis of the electronic structure of the compound NaAlSi. In a first step, the elements Na (purity 99.99%), Al (purity 99.999%), and Si (purity 99.9999%) were mixed in a ratio of Na:Al:Si = 3:1:1. Phys. Lett. (ed.) For clarity we denote the Zeeman substates corresponding to S = 1 and Sz = + 1, 0,− 1 by |S(+) >, |S(0) >, and |S(−) >, respectively, and a spin rotation around the axis n by an angle in Rn(). The plastic field in (118) can then be Z. Guguchia, A. Amato, J. Kang, H. Luetkens, P. K. Biswas, G. Prando, F. von Rohr, Z. Bukowski, A. Shengelaya, H. Keller, Direct evidence for a pressure-induced nodal superconducting gap in the Ba, H. Weng, C. Fang, Z. Fang, B. $$, \(\vec Q(\mathbf {r}_{1}, \mathbf {r}_{2}: \sigma _{1}, \sigma _{2} \), $${\mathbf{d}}(\mathbf{r}) \cdot \mathbf{S}_{pair} F(\mathbf{r}, \sigma_{1}, \sigma_{2}) = 0 $$, $$R_{x}(\pi/2)|S(+)> = \frac{1}{2}(|S(+)> + |S(-)>) + i\frac{1}{\sqrt{2}}|S(0)> $$, $$R_{x}(\pi/2)|S(0)> = -i\sqrt{2}(|S(+)> - |S(-)>) $$, $$R_{x}(\pi/2)|S(-)> = \frac{1}{2}(|S(+)>+|S(-)>) - i\frac{1}{\sqrt{2}}|S(0)> $$, $$(f_{1} - f_{2})({\boldsymbol{\sigma}}_{1} - {\boldsymbol{\sigma}}_{2})|singlet> = (f_{1} - f_{2})|{\mathbf{d}}> $$,

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