Spin pseudogap in the $S=\frac{1}{2}$ chain material Sr$_2$CuO$_3$ with impurities

A. I. Kolesnikov; A. Revcolevschi; A. Zheludev; B. B\"uchner; C. Hess; D.T. Adroja; F. Bourdarot; G. Simutis; H. C. Walker; J. Robert

arxiv: 1611.04183 · v2 · pith:LXE7SSICnew · submitted 2016-11-13 · ❄️ cond-mat.str-el

Spin pseudogap in the S=frac{1}{2} chain material Sr₂CuO₃ with impurities

G. Simutis , S. Gvasaliya , N. S. Beesetty , T. Yoshida , J. Robert , S. Petit , A. I. Kolesnikov , M. B. Stone

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F. Bourdarot H. C. Walker D.T. Adroja O. Sobolev C. Hess T. Masuda A. Revcolevschi B. B\"uchner A. Zheludev

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classification ❄️ cond-mat.str-el

keywords chainpseudogapspinantiferromagneticca-impuritiescasescenterschains

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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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Spin pseudogap in the S=frac{1}{2} chain material Sr₂CuO₃ with impurities

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