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The temperature dependence of $^1$H and $^{13}$C nuclear spin-lattice relaxation rate $1/T_1$ has been studied in the 1.6 K - 4.2 K temperature range in pure pyruvic acid and in pyruvic acid containing trityl radicals at a concentration of…

Soft Condensed Matter · Physics 2015-01-06 Marta Filibian , Sonia Colombo Serra , Marco Moscardini , Alberto Rosso , Fabio Tedoldi , Pietro Carretta

Proton NMR measurements on the organic superconductor $\kappa-(ET)_2Cu[N(CN)_2]Br$ ($T_C = 11.6$ K) exhibit stretched exponential spin-lattice relaxation below $T\approx 25$ K, suggestive of an inhomogeneous magnetic phase that develops in…

Superconductivity · Physics 2015-06-16 Joseph Gezo , Tak-Kei Lui , Brian Wolin , Charles P. Slichter , Russell Giannetta

We present a theory for inelastic neutron scattering (INS) and nuclear magnetic resonance (NMR) experiments in the pseudo-gap regime of the underdoped high-$T_c$ cuprates. We show that superconducting phase fluctuations greatly affect the…

Superconductivity · Physics 2007-05-23 Harry Westfahl , Dirk K. Morr

We performed the Te-nuclear magnetic resonance, the Mo-nuclear quadrupole resonance, and the AC susceptibility in the Weyl semimetal superconductor 1T-MoTe$_2$ at pressures up to 2.17~GPa. From the temperature and pressure dependence of the…

We report ^77Se-NMR measurements in the recent discovered K_0.8Fe_2Se_2 with the superconducting transition temperature T_c=32 K. The characteristic point of this system is that the high density of state is located in the vicinity of the…

^25Mg NMR spectra and nuclear spin-lattice relaxation time, T_1, have been measured in polycrystalline ^25MgB_2 with a superconducting transition temperature T_c = 39.0 K in zero magnetic field. From the first order and second order…

Superconductivity · Physics 2009-11-07 M. Mali , J. Roos , A. Shengelaya , H. Keller , K. Conder

We present synthesis and $^{75}$As-nuclear quadrupole resonance (NQR) measurements for the noncentrosymmetric superconductor CaPtAs with a superconducting transition temperature $T_c$ of $\sim 1.5$ K. We discovered two different forms of…

We use recent developments in the framework of time dependent matrix product state method (t-MPS) to compute the NMR relaxation rate $1/T_1$ for spin-1/2 chains under magnetic field and for different Hamiltonians (XXX, XXZ, isotropically…

Strongly Correlated Electrons · Physics 2016-11-08 E. Coira , P. Barmettler , T. Giamarchi , C. Kollath

The spin-lattice relaxation rate $1/T_1$ and the spin echo decay rate $1/T_{2G}$ for the spin-$1\over 2$ antiferromagnetic Heisenberg chain are calculated using quantum Monte Carlo and maximum entropy analytic continuation. The results are…

Condensed Matter · Physics 2009-10-28 Anders W. Sandvik

We report the $^{11}$B nuclear magnetic resonance (NMR) measurements on non-centrosymmetric superconductors NbRh$_2$B$_2$ (superconducting transition temperature $T_c$ = 7.8 K) and TaRh$_2$B$_2$ ($T_c$ = 5.9 K) with a chiral crystal…

Superconductivity · Physics 2021-12-22 Kazuaki Matano , Ryo Ogura , Mateo Fountainea , Harald O. Jeschke , Shinji Kawasaki , Guo-qing Zheng

Following earlier work on electron or hole liquids flowing through assemblies with magnetic fluctuations, we have recently exposed a marked correlation of the superconducting temperature Tc, for non s-wave pairing materials, with coherence…

Superconductivity · Physics 2007-05-23 G. G. N. Angilella , N. H. March , R. Pucci

Two-dimensional superconductors undergo a Berezinskii-Kosterlitz-Thouless transition driven by vortex-antivortex unbinding, yet experimental signatures beyond transport remain limited. Here, we show that the spin-lattice relaxation rate…

Superconductivity · Physics 2026-01-06 Wei-Wei Yang , Shao-Hang Shi , Zongsheng Zhou , Zi-Xiang Li , Kun Jiang , Jiangping Hu

We report measurements of 19F nuclear spin-lattice relaxation 1/T1 as a function of temperature and external magnetic field in LiY0.998Ho0.002F4 single crystal, a single-ion magnet exhibiting interesting quantum effects. The 19F 1/T1 is…

Mesoscale and Nanoscale Physics · Physics 2009-11-11 M. J. Graf , A. Lascialfari , F. Borsa , A. M. Tkachuk , B. Barbara

Nuclear magnetic resonance measurements were performed on CeCu$_{2}$Si$_{2}$ in the presence of a magnetic field close to the upper critical field $\mu_{0} H_{\rm c2}$ in order to investigate its superconducting (SC) properties near…

Superconductivity · Physics 2018-10-16 Shunsaku Kitagawa , Genki Nakamine , Kenji Ishida , H. S. Jeevan , C. Geibel , F. Steglich

We report here the results of $^1$H NMR spin-lattice relaxation time (T$_1$) studies in Glycine phosphite which is a ferroelectric below 224 K. The experiments have been carried out in the temperature range from 200 K to 419 K and at two…

Materials Science · Physics 2015-06-24 R. Kannan , K. P. Ramesh , J. Ramakrishna

A new theory is proposed to interpret nuclear spin-lattice relaxation-time (T_1_) measurements on the spin-1 quasi-one-dimensional Heisenberg antiferromagnet Ni(C_2_H_8_N_2_)_2_NO_2_(ClO_4_) (NENP). While Sagi and Affleck pioneeringly…

Statistical Mechanics · Physics 2009-11-10 Shoji Yamamoto , Hiromitsu Hori

We investigate the interplay between the lattice, charge, and spin dynamics in charge ordered high $T_c$ cuprate La$_{1.875}$Ba$_{0.125}$CuO$_{4}$ ($T_{c} =4$~K) based on the inverse Laplace transform (ILT) analysis of the $^{139}$La…

Strongly Correlated Electrons · Physics 2022-03-09 P. M. Singer , A. Arsenault , T. Imai , M. Fujita

Nuclear spin-lattice relaxation in one-dimensional Heisenberg ferrimagnets is studied by means of a modified spin-wave theory. Calculating beyond the first-order mechanism, where a nuclear spin directly interacts with spin waves through the…

Strongly Correlated Electrons · Physics 2015-06-25 Shoji Yamamoto , Hiromitsu Hori

Nuclear magnetic relaxation rate 1/T_1 in iron-pnictide superconductors is calculated using the gap function obtained in a microscopic calculation. Based on the obtained results, we discuss the issues such as the rapid decrease of 1/T_1…

Superconductivity · Physics 2010-01-05 T. Kariyado , M. Ogata

We report In-NQR and Co-NMR experiments of CeCoIn$_5$ that undergoes a superconducting transition with a record high $T_{\rm c}$ = 2.3 K to date among heavy-fermion superconductors. At zero magnetic field, an anomalous temperature ($T$)…

Strongly Correlated Electrons · Physics 2009-11-10 Y. Kawasaki , S. Kawasaki , M. Yashima , T. Mito , G. -q. Zheng , Y. Kitaoka , H. Shishido , R. Settai , Y. Haga , Y. Onuki
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