NMR Study of Carrier Doping Effects on Spin Gaps in the Spin Ladder Sr14-xAxCu24O41 (A = Ca, Y, and La)
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概要
- 論文の詳細を見る
Carrier doping effects on spin dynamics in Sr14-xAxCu24O41 ( A = Ca, Y, and La) are investigated by Cu NMR and NQR. The energy gaps in the spin excitation spectra (spin gap) are confirmed to be Δ = 140 K for the CuO2 chain and Δ = 470 K for the Cu2O3 ladder in Sr14Cu24O41. The spin gap for the ladder increases with the Y and La substitutions for Sr (up to x = 3), while it decreases with increasing x in Sr14-xCaxCu24O41 and seems to collapse around x = 13 of the Ca substitution. Hole-doping effects on the spin gaps for the ladder configuration are interpreted in terms of magnon and hole-depairing excitations for the spin S = 1/2 ladder.
- American Physical Societyの論文
著者
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Kato Masaya
Department Of Physics Division Of Material Science Nagoya University:crest Japan Science And Technol
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Masaki Kato
Department Of Chemistry Graduate School Of Science Kyoto University
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TSUJI Shigenari
Department of Quantum Matter, ADSM, Hiroshima University
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TSUJI Shigenori
Department of Quantum Matter, ADSM, Hiroshima University
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Tsuji Shigenori
Cryogenic Center Hiroshima University
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Susaki Tomofumi
Department Of Physics And Department Of Complexity Science And Engineering University Of Tokyo:(pres
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Tsuji S
Department Of Quantum Matter Adsm Hiroshima University
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Kato Mayumi
Institute For Solid State Physics University Of Tokyo
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Kato M
Institute For Solid State Physics University Of Tokyo
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