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相关论文: Nuclear spin-lattice relaxation studies of Cu$_{2}…

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Based on a model Hamiltonian with a d-wave pairing interaction and a competing antiferromagnetic interaction, we numerically study the site dependence of the nuclear spin resonance (NMR) relaxation rate T_1^{-1} as a function of temperature…

超导电性 · 物理学 2007-05-23 Yan Chen , Jian-Xin Zhu , C. S. Ting

We report the results of a $^{45}$Sc nuclear magnetic resonance (NMR) study on the quasi-one-dimensional compound Cu$_2$Sc$_2$Ge$_4$O$_{13}$ at temperatures between 4 and 300 K. This material has been a subject of current interest due to…

强关联电子 · 物理学 2009-11-11 C. S. Lue , C. N. Kuo , T. H. Su , G. J. Redhammer

We report combined magnetic susceptibility, dielectric constant, nuclear quadruple resonance (NQR) and zero-field nuclear magnetic resonance (NMR) measurements on single crystals of multiferroics CuBr$_2$. High quality of the sample is…

Zero-field muon-spin-relaxation measurements have been carried out in order to investigate the Zn- and Ni-substitution effects on the Cu-spin dynamics in the electron-doped Pr_0.86_LaCe_0.14_Cu_1-y_(Zn, Ni)_y_O_4+\alpa-\delta_ with y = 0,…

超导电性 · 物理学 2009-11-10 Risdiana , T. Adachi , Y. Koike , I. Watanabe , K. Nagamine

We have systematically studied the magnetic properties of Cu$_{4-x}$Zn$_x$(OH)$_6$FBr by the neutron diffraction and muon spin rotation and relaxation ($\mu$SR) techniques. Neutron-diffraction measurements suggest that the long-range…

We report static and dynamic properties of the antiferromagnetic compound Zn$_{2}$(VO)(PO$_{4}$)$_{2}$, and the consequences of non-magnetic Ti$^{4+}$ doping at the V$^{4+}$ site. $^{31}$P nuclear magnetic resonance (NMR) spectra and…

材料科学 · 物理学 2015-06-29 A. Yogi , N. Ahmed , R. Nath , A. A. Tsirlin , S. Kundu , A. V. Mahajan , J. Sichelschmidt , B. Roy , Y. Furukawa

We report single-crystal 51V NMR studies on volborthite Cu3V2O7(OH)2 2H2O, which is regarded as a quasi-two-dimensional frustrated magnet with competing ferromagnetic and antiferromagnetic interactions. In the 1/3 magnetization plateau…

We theoretically investigate the temperature dependence of nuclear spin-lattice relaxation rate $T_1^{-1}$ in bulk odd-frequency superconductivity. For a model odd-frequency pairing interaction, we first evaluate the superconducting order…

超导电性 · 物理学 2024-09-18 Shumpei Iwasaki , Yoji Ohashi

Nuclear-magnetic-resonance experiments can interrogate a broad spectrum of molecular-tumbling regimes and can accurately measure interatomic distances in solution with sub-nanometer resolution. In the zero- to ultralow-field (ZULF) regime,…

We successfully observed the frequency distribution of Cu nuclear spin-lattice relaxation time in the superconducting state of single crystals Bi2212, which we believe corresponds to a theoretical suggestion from the analysis of the energy…

超导电性 · 物理学 2013-08-06 Y. Itoh , D. Goto , T. Machi

We consider nuclear spin-lattice relaxation rate resulted from a fractional diffusion equation for anomalous rotational wobbling in a cone. The mechanism of relaxation is assumed to be due to dipole-dipole interaction of nuclear spins and…

统计力学 · 物理学 2011-06-30 A. E. Sitnitsky

Magnetic excitations in the spin-$\frac{1}{2}$ distorted kagome lattice antiferromagnet Cs$_2$Cu$_3$SnF$_{12}$, which has an ordered ground state owing to the strong Dzyaloshinskii-Moriya interaction, were studied using inelastic neutron…

强关联电子 · 物理学 2017-02-17 T. Ono , K. Matan , Y. Nambu , T. J. Sato , K. Katayama , S. Hirata , H. Tanaka

We present measurements on nuclear spin relaxation probed by a single quantum dot in a high-mobility electron gas. Current passing through the dot leads to a spin transfer from the electronic to the nuclear spin system. Applying electron…

介观与纳米尺度物理 · 物理学 2009-11-10 A. K. Huettel , J. Weber , A. W. Holleitner , D. Weinmann , K. Eberl , R. H. Blick

The effects on the correlated Cu^{2+} S = 1/2 spin dynamics in the paramagnetic phase of La_{2-x}Sr_xCuO_4 (for $x \lesssim 0.04$) due to the injection of holes are studied by means of ^{63}Cu NQR spin-lattice relaxation time T_1…

强关联电子 · 物理学 2009-10-31 P. Carretta , F. Tedoldi , A. Rigamonti , F. Galli , F. Borsa , J. H. Cho , D. C. Johnston

Nuclear magnetic resonance (NMR) is a fundamental bulk probe that provides key information about the electronic properties of materials. Very recently, the analysis of all available planar copper shift as well as relaxation data proved that…

超导电性 · 物理学 2020-09-22 Danica Pavićević , Marija Avramovska , Jürgen Haase

We calculated the nuclear spin-lattice relaxation rate $1/T_1$ for the D+iD superconducting state with impurities. We found that small amount of unitary impurities quickly produces the residual density of states inside the gap. As a result,…

强关联电子 · 物理学 2009-11-10 Yunkyu Bang , M. J. Graf , A. V. Balatsky

We demonstrate that the integrated intensity of Cu-63 nuclear quadrupole resonance (NQR) in La(1.6-x)Nd(0.4)Sr(x)CuO(4) decreases dramatically below the charge-stripe ordering temperature T(charge). Comparison with neutron and X-ray…

超导电性 · 物理学 2009-10-31 P. M. Singer , A. W. Hunt , A. F. Cederstrom , T. Imai

We provide a theoretical framework to compute the zero field muon spin relaxation rate of a Heisenberg ferromagnet at low temperature. We use the linear spin wave approximation. The rate, which is a measure of the spin lattice relaxation…

凝聚态物理 · 物理学 2009-10-28 P. Dalmas de Reotier , A. Yaouanc

We estimated the spread of the magnetically enhanced regions (wipeout regions) around Zn ions in high-Tc superconductors YBa2(Cu1-xZnx)4O8 (x=0, 0.005, 0.01, and 0.022) at T=4.2 K, via the planar 63Cu nuclear spin-lattice relaxation study…

超导电性 · 物理学 2016-08-31 Y. Itoh , T. Machi , N. Watanabe , S. Adachi , C. Kasai , N. Koshizuka

We report the observation of nuclear quadrupole resonance (NQR) of Cu from the sites near the doping center in the spin-Peierls system CuGe$_{1-x}$Si$_{x}$O$_3$. The signal appears as the satellites in the Cu NQR spectrum, and has a…

强关联电子 · 物理学 2009-11-07 Jun Kikuchi , Takao Matsuoka , Kiyoichiro Motoya , Touru Yamauchi , Yutaka Ueda