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Field-induced transition between magnetically disordered and ordered phases in underdoped La$$_{2-x}$$Sr$$_{x}$$CuO$$_{4}$$

低ホール濃度La$$_{2-x}$$Sr$$_{x}$$CuO$$_{4}$$における磁場誘起の磁気秩序-無秩序相転移

Khaykovich, B.*; 脇本 秀一  ; Birgeneau, R. J.*; Kastner, M. A.*; Lee, Y. S.*; Smeibidle, P.*; Vorderwisch, P.*; 山田 和芳*

Khaykovich, B.*; Wakimoto, Shuichi; Birgeneau, R. J.*; Kastner, M. A.*; Lee, Y. S.*; Smeibidle, P.*; Vorderwisch, P.*; Yamada, Kazuyoshi*

高温超伝導体であるLa$$_{2-x}$$Sr$$_{x}$$CuO$$_{4}$$の、弱低ドープであるx=0.144の試料について、磁場中での中性子散乱を行った。結果、零磁場中では観測されないスピン密度波の秩序状態が、3テスラ以上の磁場中で発現することを観測し、磁場により誘起される磁気的秩序状態への磁気相転移が存在することがわかった。この結果は近年の量子相転移の理論でよく説明される。

Magnetic field-induced transition between magnetically disordered and ordered phases in slightly under-doped La$$_{2-x}$$Sr$$_{x}$$CuO$$_{4}$$ with $$x=0.144$$ has been observed. Static incommensurate spin-density-wave order is induced above a critical field of about 3 T, as measured by elastic neutron scattering. These results are consistent with recently developed quantum phase transition scenario.

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パーセンタイル:89.86

分野:Materials Science, Multidisciplinary

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