STM studies on the pairing symmetry and pair breaking of high-Tc cuprates

高温铜酸盐配对对称性和配对破缺的STM研究

• 批准号: 07640458
• 负责人: ODA Migaku
• 金额: $ 1.6万
• 依托单位: HOKKAIDO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07640458/
• 关键词: high-Tc cuprate; gap symmetry; pair breaking; STM; STS; pairing interaction; 走査型トンネル顕微鏡; 走査型トンネル分光; 超伝導ギャップ; 電子対の対称性; 銅酸物高温超伝導体; d波対称性

To understand the pairing mechanism of high-Tc cuprates, we have studied the superconducting gap symmetry and pair breaking effects in Bi-based high-Tc cuprate by STM/STS.The following results were obtained :1) The gap is of d_<x2-y2> symmetry.2) The gap magnitude, corresponding to the pairing interaction strength, correlates with the development of an antiferromagnetic correlation.These results support the contention that an antiferromagnetic correlation is an essential factor in the pairing mechanism of high-Tc cuprates.

为了理解高温超导铜氧化物的配对机制，我们用STM/STS研究了Bi系高温超导铜氧化物的超导能隙对称性和对破缺效应，得到以下结果：1）差距为d_1，2）差距的大小对应于对相互作用的强度<x2-y2>，这些结果支持了反铁磁相关性是一个基本的反铁磁相关性的论点，高Tc铜酸盐的配对机制中的因素。

项目成果

M. Oda: "STM images of a superconducting Cu-O plane and the corresponding tunneling spectrum in Bi_2 Sr_2 CaCu_2 O_<8+δ>" Physical Review B. 53. 2253-2256 (1996)

M. Oda：“超导 Cu-O 平面的 STM 图像以及 Bi_2 Sr_2 CaCu_2 O_<8+δ> 中相应的隧道谱”物理评论 B. 53. 2253-2256 (1996)

M. Oda: "STM and STS studies on the superconducting gap symmetry of Bi_2 Sr_2 CaCu_2 O_<8+δ>" physica C. 263. 241-244 (1996)

M. Oda：“Bi_2 Sr_2 CaCu_2 O_<8+δ>超导能隙对称性的 STM 和 STS 研究” Physica C. 263. 241-244 (1996)

M. Ido: "Pressure effect on superconductivity and structural phase transition in La_<1.8-X>Nd_<a2>BaxCuO_4" Chechoslovak Journal of Physics. 46. 1235-1236 (1996)

M. Ido：“La_<1.8-X>Nd_<a2>BaxCuO_4 中超导性和结构相变的压力效应”《切乔斯洛伐克物理学杂志》。

M.Oda, C.Manabe and M.Ido: "Atomic-Plane-Selective STM Imagging and STS on the Bi_2Sr_2CaCu_2O_<8+delta> Cleaved Surface" J.Low-Temperature Physics. 105. 489-494 (1996)

M.Oda、C.Manabe 和 M.Ido：“Bi_2Sr_2CaCu_2O_<8 delta> 裂面的原子平面选择性 STM 成像和 STS”J.低温物理。

M. Odo: "STM and STS studies on the supercorducting gap symmetry of Bi_2 Sr_2 Ca_2O_<8+8>" Physica C. 263. 241-244 (1996)

M. Odo：“Bi_2 Sr_2 Ca_2O_<8 8> 超导能隙对称性的 STM 和 STS 研究”Physica C. 263. 241-244 (1996)