首页|Observation of parabolic electron bands on superconductor LaRu2As2

Observation of parabolic electron bands on superconductor LaRu2As2

扫码查看
原文链接
  • NETL
  • NSTL
  • 万方数据
Ru-based superconductor LaRu2As2 has been discovered exhibiting the highest critical temperature of～7.8 K among iron-free transition metal pnictides with the ThCr2Si2-type crystal structure.However,microscopic research on this novel superconducting material is still lacking.Here,we utilize scanning tunneling microscopy/spectroscopy to uncover the superconductivity and surface structure of LaRu2As2.Two distinct terminating surfaces are identified on the cleaved crystals,namely,the As surface and the La surface.Atomic missing line defects are observed on the La surface.Both surfaces exhibit a superconducting gap of～1.0 meV.By employing quasiparticle interference techniques,we observe standing wave patterns near the line defects on the La atomic plane.These patterns are attributed to quasiparticle scattering from two electron type parabolic bands.

superconductivityline defectquasi-particle scatteringelectron band

周兴泰、李更、潘禄禄、陈子超、李萌、时延昊、杨海涛、高鸿钧

展开 >

Beijing National Center for Condensed Matter Physics and Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China

School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100190,China

Hefei National Laboratory,Hefei 230088,China

National Natural science Foundation of ChinaNational Natural science Foundation of ChinaNational Key R&D Program of ChinaChinese Academy of SciencesInnovation Program of Quantum Science and Technology

62488201520724012019YFA0308500YSBR-0032021ZD0302700

2024

10.1088/1674-1056/ad4d63

中国物理B(英文版)
中国物理学会和中国科学院物理研究所

中国物理B(英文版)

CSTPCDEI
影响因子：0.995
ISSN：1674-1056
年,卷(期)：2024.33(7)
  • 34