Spin pseudogap in the $S=\frac{1}{2}$ chain material ${\mathrm{Sr}}_{2}{\mathrm{CuO}}_{3}$ with impurities

Spin pseudogap in the $S = \frac{1}{2}$ chain material ${Sr}_{2} {CuO}_{3}$ with impurities

G. Simutis, S. Gvasaliya, N. S. Beesetty, T. Yoshida, J. Robert, S. Petit, A. I. Kolesnikov, M. B. Stone, F. Bourdarot, H. C. Walker, D. T. Adroja, O. Sobolev, C. Hess, T. Masuda, A. Revcolevschi, B. Büchner, and A. Zheludev

Phys. Rev. B 95, 054409 – Published 7 February 2017

Abstract

The low-energy magnetic excitation spectrum of the Heisenberg antiferromagnetic $S = 1 / 2$ chain system ${Sr}_{2} {CuO}_{3}$ with Ni and Ca impurities is studied by neutron spectroscopy. In all cases, a defect-induced spectral pseudogap is observed and shown to scale proportionately to the number of scattering centers in the spin chains.

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Received 11 November 2016
Revised 23 January 2017

DOI:https://doi.org/10.1103/PhysRevB.95.054409

Physics Subject Headings (PhySH)

Magnetism

Quantum spin models

Inelastic neutron scattering

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

G. Simutis^1,*, S. Gvasaliya¹, N. S. Beesetty², T. Yoshida³, J. Robert⁴, S. Petit⁴, A. I. Kolesnikov⁵, M. B. Stone⁶, F. Bourdarot⁷, H. C. Walker⁸, D. T. Adroja⁸, O. Sobolev⁹, C. Hess¹⁰, T. Masuda³, A. Revcolevschi², B. Büchner¹⁰, and A. Zheludev¹

¹Neutron Scattering and Magnetism, Laboratory for Solid State Physics, ETH Zürich, Zürich, Switzerland
²Synthese, Proprietes et Modelisation des Materiaux, Universite Paris-Sud, 91405 Orsay Cedex, France
³Institute for Solid State Physics, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan
⁴Laboratoire Léon Brillouin, CEACNRS, CEA-Saclay, F-91191 Gif-sur-Yvette, France
⁵Chemical and Engineering Materials Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
⁶Quantum Condensed Matter Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6393, USA
⁷Modélisation et dexploration de la matiére, Université Grenoble Alpes et CEA, INAC, 17 rue des Martyrs, 38054 Grenoble, France
⁸ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon OX11 OQX, United Kingdom
⁹Forschungsneutronenquelle Heinz Maier-Leibnitz (FRM-II), TU Munchen, D-85747 Garching, Germany
¹⁰Leibniz Institute for Solid State and Materials Research IFW Dresden, P.O. Box 270116, D-01171 Dresden, Germany

^*gsimutis@phys.ethz.ch

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Vol. 95, Iss. 5 — 1 February 2017

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Physical Review B

covering condensed matter and materials physics

Spin pseudogap in the $S = \frac{1}{2}$ chain material ${Sr}_{2} {CuO}_{3}$ with impurities

G. Simutis, S. Gvasaliya, N. S. Beesetty, T. Yoshida, J. Robert, S. Petit, A. I. Kolesnikov, M. B. Stone, F. Bourdarot, H. C. Walker, D. T. Adroja, O. Sobolev, C. Hess, T. Masuda, A. Revcolevschi, B. Büchner, and A. Zheludev

Phys. Rev. B 95, 054409 – Published 7 February 2017

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Physical Review B

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Spin pseudogap in the S=12 chain material Sr2CuO3 with impurities

G. Simutis, S. Gvasaliya, N. S. Beesetty, T. Yoshida, J. Robert, S. Petit, A. I. Kolesnikov, M. B. Stone, F. Bourdarot, H. C. Walker, D. T. Adroja, O. Sobolev, C. Hess, T. Masuda, A. Revcolevschi, B. Büchner, and A. Zheludev

Phys. Rev. B 95, 054409 – Published 7 February 2017

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Spin pseudogap in the $S = \frac{1}{2}$ chain material ${Sr}_{2} {CuO}_{3}$ with impurities