μSR and NMR study on quantum critical point in quantum spin ladder (CH3)2CHNH3Cu(ClxBr 1-x)3

S. Nakajima, T. Goto, T. Suzuki, I. Watanabe, H. Manaka, A. Amato

研究成果: Conference article

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(CH3)2CHNH3Cu(ClxBr 1-x)3 abbreviated IPACu(ClxBr 1-x)3 is a mixed system of spin-gap compounds IPACuCl 3 and IPACuBr3. This mixed system is reported by macroscopic measurements to show a magnetic order when the value of x is between the quantum critical points (QCPs) 0.44 and 0.87. We have investigated microscopically the ground state of the samples x = 0.40, 0.45 and 0.50 which are located near the QCP of xc = 0.44, by Muon Spin Relaxation (μSR) and NMR measurements. For x = 0.40, μSR measurements in zero and longitudinal fields have shown that the spin fluctuation shows a significant slowing down with decreasing temperature, although the magnetic order does not appear down to T = 15 mK, indicating that the ground state is an exotic one rather than a gapped one. For x = 0.45 and 0.50, μSR and NMR measurements do not show any magnetic order at low temperatures, indicating that the QCP is larger than the reported value of xc = 0.44.

元の言語English
記事番号022036
ジャーナルJournal of Physics: Conference Series
200
発行部数SECTION 2
DOI
出版物ステータスPublished - 2010 1 1

ASJC Scopus subject areas

  • Physics and Astronomy(all)

フィンガープリント μSR and NMR study on quantum critical point in quantum spin ladder (CH<sub>3</sub>)<sub>2</sub>CHNH<sub>3</sub>Cu(Cl<sub>x</sub>Br <sub>1-x</sub>)<sub>3</sub>' の研究トピックを掘り下げます。これらはともに一意のフィンガープリントを構成します。

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