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We examine the temperature dependence of the electronic states in the stripe phase of high-Tc cuprates by using the t-J model with a potential that stabilizes vertical charge stripes. Charge and spin-correlation functions and optical…

强关联电子 · 物理学 2009-10-31 Y. Shibata , T. Tohyama , S. Maekawa

We have investigated the magnetic ground state properties of the quantum spin trimer compound strontium hydroxy copper chloride SrCu(OH)$_3$Cl using bulk magnetization, specific heat measurements, nuclear magnetic resonance (NMR), and…

The spin-glass behavior in the ferromagnetic phase of $\mathrm{Tm_2Cu_2In}$ was investigated by dc-, ac-magnetization, and non-equilibrium dynamics characterizations. Arc-melted polycrystalline compound of $\mathrm{Tm_2Cu_2In}$ crystallizes…

材料科学 · 物理学 2021-11-10 Baidyanath Sahu , R. Djoumessi Fobasso , Andre M. Strydom

Static and dynamic behavior of short-range Ising-spin glass Cu$_{0.5}$Co$_{0.5}$Cl$_{2}$-FeCl$_{3}$ graphite bi-intercalation compounds (GBIC) has been studied with SQUID DC and AC magnetic susceptibility. The $T$ dependence of the…

无序系统与神经网络 · 物理学 2009-11-10 Itsuko S. Suzuki , Masatsugu Suzuki

We report NMR study on the spin correlations in the spin-cluster based mineral Na$_2$Cu$_3$O(SO$_4$)$_3$ with magnetic fields ranged from 1 T to 33 T. The long-range magnetic order is observed from both the sudden spectral broadening at…

强关联电子 · 物理学 2023-06-27 Long Ma , J. X. Li , L. S. Ling , Y. Y. Han , L. Zhang , L. Hu , W. Tong , C. Y. Xi , Li Pi

Spin susceptibility of stabilized \delta phase in the Pu-Ga alloy is studied by measuring {69,71}^Ga NMR spectra and nuclear spin-lattice relaxation rate {69}T_{1}^{-1} in the temperature range 5 - 350 K. The shift ({69}^K) of the…

Nuclear magnetic resonance (NMR) experiments on single crystals of HgBa$_{2}$CuO$_{4+\delta}$ are presented that identify two distinct temperature-dependent spin susceptibilities: one is due to a spin component that is temperature-dependent…

We use Monte Carlo simulations to investigate the dynamical properties of the infinite range 10 states Potts glass. By analyzing the spin autocorrelation function for system sizes up to N=2560, we show that strong finite size effects are…

统计力学 · 物理学 2009-11-07 Claudio Brangian , Walter Kob , Kurt Binder

The static and the dynamic spin correlations in the low temperature collapsed tetragonal and the high temperature tetragonal phase in CaFe2As2 have been investigated by 75As nuclear magnetic resonance (NMR) and nuclear quadrupole resonance…

超导电性 · 物理学 2015-06-18 Y. Furukawa , B. Roy , S. Ran , S. L. Bud'ko , P. C. Canfield

A theory of electron spin relaxation in semiconducting carbon nanotubes is developed based on the hyperfine interaction with disordered nuclei spins I=1/2 of $^{13}$C isotopes. It is shown that strong radial confinement of electrons…

材料科学 · 物理学 2009-11-11 Y. G. Semenov , K. W. Kim , G. J. Iafrate

The classical spin system consisting of three spins with Heisenberg interaction is an example of a completely integrable mechanical system. In this paper we explicitly calculate thermodynamic quantities as density of states, specific heat,…

统计力学 · 物理学 2022-11-23 Heinz-Jürgen Schmidt , Christian Schröder

We performed angular and temperature-dependent electron-spin-resonance measurements in the quasi-two-dimensional organic conductor $\kappa$-(BEDT-TTF)$_2$Cu[N(CN)$_2$]I. The interlayer spin-diffusion is much weaker compared to the Cl- and…

63Cu nuclear magnetic resonance (NMR) spin-echo decay rate (T_2^{-1}) measurements are reported for the normal and superconducting states of a single crystal of Pr_{1.85}Ce_{0.15}CuO_{4-y} (PCCO) in a magnetic field B_0=9T over the…

超导电性 · 物理学 2009-11-10 F. Zamborszky , G. Wu , J. Shinagawa , W. Yu , H. Balci , R. L. Greene , W. G. Clark , S. E. Brown

We use the concept of typicality to study the real-time dynamics of spin and energy currents in spin-1/2 models in one dimension and at nonzero temperatures. These chains are the integrable XXZ chain and a nonintegrable modification due to…

强关联电子 · 物理学 2015-03-10 Robin Steinigeweg , Jochen Gemmer , Wolfram Brenig

We investigate nuclear spin-lattice relaxation data in the normal state of optimally doped YBaCuO_7 by analyzing the contributions to the relaxation rate of the copper, planar oxygen and yttrium along the directions perpendicular to the…

超导电性 · 物理学 2009-11-11 A. Uldry , P. F. Meier

Detailed experimental investigations of thermal and magnetic properties are presented for Cu(NH3)4SO4.H2O, an ideal uniform Heisenberg spin half chain compound. A comparison of these properties with relevant spin models is also presented.…

In the present work, we have reported the temperature dependent thermopower ($\alpha$) behavior of La$_{0.75}$Ba$_{0.25}$CoO$_{3}$ compound in the temperature range 300-600 K. Using the Heikes formula, the estimated value of $\alpha$…

强关联电子 · 物理学 2017-04-25 Saurabh Singh , Devendra Kumar , Sudhir K. Pandey

The temperature of the chiral restoration phase transition at 130 MeV as well as the temperature of the center symmetry ("deconfinement") phase transition in a pure glue theory at 300 MeV are two independent temperatures and their interplay…

高能物理 - 格点 · 物理学 2021-08-19 L. Ya. Glozman , Y. Aoki , S. Hashimoto , C. Rohrhofer

We have performed AC susceptibility and DC magnetic relaxation measurements on the spin ice system Dy$_2$Ti$_2$O$_7$ down to 0.08 K. The relaxation time of the magnetization has been estimated below 2 K down to 0.08 K. The spin dynamics of…

强关联电子 · 物理学 2012-02-07 K. Matsuhira , C. Paulsen , E. Lhotel , C. Sekine , Z. Hiroi , S. Takagi

We have measured the thermal conductivity along the c-axis, \k{appa}||c, parallel to ferromagnetic spin-chains of single crystals of the S = 1/2 quasi-one-dimensional spin system CsCuCl3 in magnetic fields up to 14 T, in order to…

强关联电子 · 物理学 2015-10-30 T. Kawamata , H. Sudo , Y. Matsuoka , K. Naruse , M. Ohno , T. Sasaki , Y. Koike