Feベースの超伝導体におけるネマティック量子批判性は,ストレストーニングによって明らかになった

Thanapat Worasaran^1,2, Matthias S Ikeda^3,2, Johanna C Palmstrom^3,2

¹Stanford Institute for Materials and Energy Science, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA. tworasar@stanford.edu irfisher@stanford.edu.

Science (New York, N.Y.)

|May 28, 2021

まとめ

研究者らは鉄基の超伝導体における量子的ネマティック変動の直接的な証拠を発見した. 電子の奇妙な振る舞いを理解する上で重要なこれらの変動は量子的臨界点に近い幅広い条件に及ぶのです

科学分野:

凝縮物質物理学
材料科学
量子材料について

背景:

量子批判性は奇妙な電子行動の鍵ですが量子批判的変動の直接的な証拠は稀です
特徴的なシグネチャーには,量子的臨界点 (QCP) 近くの熱力学定理のスケーリングが含まれます.

研究の目的:

鉄基の超伝導体における量子的変動の決定的な証拠を提供するためです
非熱調節下にある QCP の近くの熱力学的数値の振る舞いを調査する.

主な方法:

鉄基超伝導体の代表的な家族を研究した.
非熱調節パラメータとして適用された単軸張力.
結合されたネマティック/構造的相移行の臨界温度を観測した.

主要な成果:

単軸張力の関数として,臨界温度の明瞭な力法則の振る舞いを観察した.
この物質システムにおける量子的ネマティック変動の直接的な証拠を提供した.
これらの変動は,QCP周辺の狭い領域に限定されていないことが示されています.

結論:

量子クリティカルなネマティック波動は,鉄ベースの超伝導体において存在し,有意である.
これらの変動は,これまで考えられていたより広範な影響を及ぼし,温度と組成の広い範囲に及ぶ.
この発見は,複雑な電子システムにおける量子的批判性の理解を進めている.

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