Dynamics of Spin-Charge Stripe Order in La-Based High Tc Cuprates

La 基高温铜氧化物中自旋电荷条纹有序的动力学

• 批准号: 10440099
• 负责人: UCHIDA Shin-ichi
• 金额: $ 4.03万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10440099/
• 关键词: Stripe Order; La-Based Curates; Far Infrared Spectroscopy; ARPES; Hall Effect; スピン・電荷秩序; 中性子散乱; x線散乱; 光学伝導度; 電子輸送現象

We have studied the striped ordered state in LaィイD22-x-yィエD2NdィイD2yィエD2SrィイD2xィエD2CuOィイD24ィエD2 be the transport and optical measurements and also by using μ SR and angle-resolved photoemission spectroscopy (ARPES).(i) Are the charge stripes insulating or metallic?(ii) Is there evidence for one-dimensional carrier mortion along the stripes?(iii) Does superconductivity coexist with the static stripe order?The resistivity and optical conductivity have given evidence that metallic charge stripes exist on the antiferramagnetically ordered spin background. This is in contrast to the insulating striped in the doped nickelates and manganities, and the metallic stripes are unique of cuprate stripes. The highlight of the present project is that we have obtained clear evidence for one-dimensional charge dynamics from the Hall effect and ARPES measurements. The Hall effect demonstrates a crossover to the two-dimensional regime for x larger than 1/8. In this regime the superconductivity likely coexist with the stripe order.

我们通过传输和光学测量以及使用 μ SR 和角分辨光电子能谱 (ARPES) 研究了 LaD22-x-yD2NdD2yD2SrD2xD2CuOD24D2 中的条纹有序态。(i) 电荷条纹是绝缘的还是金属的？(ii) 是有证据表明存在一维载流子运动条纹？（iii）超导性与静态条纹序共存吗？电阻率和光导率证明金属电荷条纹存在于反铁磁性有序的自旋背景上，这与掺杂镍酸盐和锰中的绝缘条纹形成对比。金属条纹是铜酸盐条纹的独特之处，本项目的亮点是我们从霍尔效应和 ARPES 测量中获得了一维电荷动力学的明确证据。证明了 x 大于 1/8 时的二维状态的交叉，在该状态中，超导性可能与条纹顺序共存。

项目成果

A. Ino: "Fermi Surface and Band Dispersion in LaィイD22-xィエD2SrィイD2xィエD2CuOィイD24ィエD2"J. Phys. Soc. Jpn.. 68. 1496-1499 (1999)

A. Ino：“LaD22-xD2SrD2xD2CuOD24D2 中的费米表面和能带色散”Jpn.. 68. 1496-1499 (1999)

S. Tajima: "In-Plane Charge Dynamics in (La<@D1.45@>D2Nd<@D0.4@>D2Sr<@D0.15@>D2)CuO<@D4@>D2"Europhys. Lett.. 47. 715-721 (1999)

S. Tajima：“(La<@D1.45@>D2Nd<@D0.4@>D2Sr<@D0.15@>D2)CuO<@D4@>D2 中的面内电荷动力学”Europhys。

S. Uchida: "Physics and Chemistry of Transition-Metal Oxides"Springer. 336 (1999)

S. Uchida：“过渡金属氧化物的物理和化学”施普林格。

S. Tajima: "In-Plane Charge Dynamics in (LaィイD21.6-xィエD2NdィイD20.4ィエD2SrィイD2xィエD2)CuOィイD24ィエD2"Europhys. Lett.. 47. 715-721 (1999)

S. Tajima：“(D21.6-xD2NdD20.4D2SrD2xD2)CuOD24D2 中的面内电荷动力学”Europhys 47. 715-721 (1999)

X. J. Zhou: "One-Dimensional Electronic Structure in (La<@D1.45@>D2Nd<@D0.4@>D2Sr<@D0.15@>D2)CuO<@D4@>D2"Science. 286. 268-272 (1999)

周X.J.周：“(La<@D1.45@>D2Nd<@D0.4@>D2Sr<@D0.15@>D2)CuO<@D4@>D2中的一维电子结构”科学。