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We review the results of recent studies of the elastic and inelastic neutron scattering from a variety of heavy fermion compounds. This class of materials exhibits a rich variety of ground states: antiferromagnetically ordered,…

Condensed Matter · Physics 2007-05-23 T. E. Mason , G. Aeppli

We have performed inelastic neutron scattering on the near ideal spin-ladder compound La4Sr10Cu24O41, which will serve as a model system for the investigation of doped ladders. A key feature in the analysis was the separation of one-triplon…

For ultracold neutrons with a kinetic energy below 10 neV, strong scattering, characterized by $2\pi l_{c} / \lambda\leq 1$, can be obtained in metamaterials of C and $^7$Li. Here $l_{c}$ and $\lambda$ are the coherent scattering mean free…

Instrumentation and Detectors · Physics 2020-09-18 Zhehui Wang , Marcel Demarteau , C. L. Morris , Yanhua Shih

We have successfully grown sizable single crystals of La_2Cu_{1-z}(Zn,Mg)_zO_4 with up to nearly half of the magnetic Cu sites replaced by non-magnetic Zn and Mg. Neutron scattering, SQUID magnetometry, and complementary quantum Monte Carlo…

Strongly Correlated Electrons · Physics 2009-11-07 O. P. Vajk , M. Greven , P. K. Mang , J. W. Lynn

By performing time-of-flight neutron scattering measurements on a large amount of single crystals of Sr$_2$RuO$_4$, we studied detailed structure of the imaginary part of the dynamic spin susceptibility over a wide range of phase space. In…

Strongly Correlated Electrons · Physics 2015-05-28 K. Iida , M. Kofu , N. Katayama , J. Lee , R. Kajimoto , Y. Inamura , M. Nakamura , M. Arai , Y. Yoshida , M. Fujita , K. Yamada , S. -H. Lee

We report a neutron scattering study on the tetragonal compound Sr_2Cu_3O_4Cl_2, which has two-dimensional (2D) interpenetrating Cu_I and Cu_{II} subsystems, each forming a S=1/2 square lattice quantum Heisenberg antiferromagnet (SLQHA).…

Neutron scattering measurements were performed to investigate magnetic excitations in a single-crystal sample of the ternary iron arsenide BaFe2As2, a parent compound of a recently discovered family of Fe-based superconductors. In the…

Strongly Correlated Electrons · Physics 2009-02-28 K. Matan , R. Morinaga , K. Iida , T. J. Sato

Magnetic excitations in \srruo ~ have been studied by inelastic neutron scattering. The magnetic fluctuations are dominated by incommensurate peaks related to the Fermi surface nesting of the quasi-one-dimensional $d_{xz}$- and…

Strongly Correlated Electrons · Physics 2009-11-07 M. Braden , Y. Sidis , P. Bourges , P. Pfeuty , J. Kulda , Z. Mao , Y. Maeno

Strange quark contributions to neutrino(antineutrino) scattering are investigated on the nucleon level in the quasi-elastic region. The incident energy range between 500 MeV and 1.0 GeV is used for the scattering. All of the physical…

Nuclear Theory · Physics 2008-11-26 Myung-Ki Cheoun , K. S. Kim

Elastic and inelastic neutron scattering measurements have been performed on powder and single-crystal samples of orthorhombic CeRu2Al10. The order forming below T0 = 27 K was identified as a long-range antiferromagnetic state with the wave…

We present specific-heat and neutron-scattering results for the \emph{S}=1/2 quantum antiferromagnet (dimethylammonium)(3,5-dimethylpyridinium)CuBr$_4$. The material orders magnetically at \emph{T}$_N$=1.99(2)\,K, and magnetic excitations…

[Ni(HF$_2$)(3-Clpyridine)$_4$]BF$_4$ (NBCT) is a one-dimensional, $S = 1$ spin chain material that shows no magnetic neutron Bragg peaks down temperatures of 0.1 K. Previous work identified NBCT to be in the Haldane phase and near a quantum…

Inelastic neutron scattering is used to study transverse-polarized magnetic excitations in the quasi-one-dimensional S=1/2 antiferromagnet BaCu_2Si_2O_7, where the saturation value for the N\'eel order parameter is $m_0=0.12 \mu_{\rm B}$…

Strongly Correlated Electrons · Physics 2009-10-31 A. Zheludev , M. Kenzelmann , S. Raymond , E. Ressouche , T. Masuda , K. Kakurai , S. Maslov , I. Tsukada , K. Uchinokura , A. Wildes

We carried out inelastic neutron scattering experiments on a powdered sample of the antiferromagnetic (AFM) uniform spin-1/2 chain compound CuSb2O6.The magnetic excitations appear in the energy range of 1.8 to 13 meV at 2.5 K below the AFM…

Strongly Correlated Electrons · Physics 2026-04-20 Masashi Hasea , Minoru Soda , Takatsugu Masuda , Shinichi Itoh , Tetsuya Yokoo

Inelastic neutron scattering provides a probe for studying the spin and momentum structure of the superconducting gap. Here, using a two-orbital model for the Fe-pnicitide superconductors and an RPA-BCS approximation for the dynamic spin…

Superconductivity · Physics 2009-09-10 T. A. Maier , D. J. Scalapino

We study dynamical properties of the anisotropic triangular quantum antiferromagnet Cs_2CuCl_4. Inelastic neutron scattering measurements have established that the dynamical spin correlations cannot be understood within a linear spin wave…

Strongly Correlated Electrons · Physics 2007-05-23 Martin Y. Veillette , Andrew J. A. James , Fabian H. L. Essler

The present chapter reviews current neutron and x-ray scattering techniques employed to elucidate the magnetic structures and spin dynamics of magnetic materials. Both techniques provide measurements as a function of the energy and the…

Materials Science · Physics 2021-06-07 Jeffrey W. Lynn , Bernhard Keimer

We report inelastic neutron scattering experiments in Ca2Y2Cu5O10 and map out the full one magnon dispersion which extends up to a record value of 53 meV for frustrated ferromagnetic (FM) edge-sharing CuO2 chain (FFESC) cuprates. A…

Strongly Correlated Electrons · Physics 2019-10-09 M. Matsuda , J. Ma , V. O. Garlea , T. Ito , H. Yamaguchi , K. Oka , S. -L. Drechsler , R. Yadav , L. Hozoi , H. Rosner , R. Schumann , R. O. Kuzian , S. Nishimoto

Inelastic neutron scattering for temperatures below 30 K from a powder of LiZn2Mo3O8 demonstrates this triangular-lattice antiferromagnet hosts collective magnetic excitations from spin 1/2 Mo3O13 molecules. Apparently gapless (\Delta < 0.2…

We report a neutron scattering study of the metallic triangular lattice antiferromagnet PdCrO$_2$. Powder neutron diffraction measurements confirm that the crystalline space group symmetry remains $R\bar{3}m$ below $T_N$. This implies that…