首页|Electronic Correlation and Pseudogap-Like Behavior of High-Temperature Superconductor La3Ni2O7

Electronic Correlation and Pseudogap-Like Behavior of High-Temperature Superconductor La3Ni2O7

扫码查看
原文链接
  • NETL
  • NSTL
  • 万方数据
High-temperature superconductivity(HTSC)remains one of the most challenging and fascinating mysteries in condensed matter physics.Recently,superconductivity with transition temperature exceeding liquid-nitrogen temperature is discovered in La3Ni2O7 at high pressure,which provides a new platform to explore the uncon-ventional HTSC.In this work,using high-resolution angle-resolved photoemission spectroscopy and ab initio calculation,we systematically investigate the electronic structures of La3Ni2O7 at ambient pressure.Our ex-periments are in nice agreement with ab initio calculations after considering an orbital-dependent band renor-malization effect.The strong electron correlation effect pushes a flat band of dz2 orbital component below the Fermi level(EF),which is predicted to locate right at EF under high pressure.Moreover,the dx2-y2 band shows pseudogap-like behavior with suppressed spectral weight and diminished quasiparticle peak near EF.Our findings provide important insights into the electronic structure of La3Ni2O7,which will shed light on understanding of the unconventional superconductivity in nickelates.

李义典、杜宪、曹延涛、裴翠颖、张明鑫、赵文轩、翟恺熠、许润哲、柳仲楷、李志伟、赵金奎、李刚、齐彦鹏、郭汉杰、陈宇林、杨乐仙

展开 >

State Key Laboratory of Low Dimensional Quantum Physics,Department of Physics,Tsinghua University,Beijing 100084,China

Key Lab for Magnetism and Magnetic Materials of the Ministry of Education,Lanzhou University,Lanzhou 730000,China

Songshan Lake Materials Laboratory,Dongguan 523808,China

School of Physical Science and Technology,ShanghaiTech University,Shanghai 201210,China

ShanghaiTech Laboratory for Topological Physics,Shanghai 200031,China

Shanghai Key Laboratory of High-Resolution Electron Microscopy,ShanghaiTech University,Shanghai 201210,China

Department of Physics,Clarendon Laboratory,University of Oxford,Parks Road,Oxford OX1 3PU,UK

Frontier Science Center for Quantum Information,Beijing 100084,China

展开 >

国家重点研发计划国家重点研发计划国家自然科学基金国家自然科学基金国家自然科学基金Guangdong Basic and Applied Basic Research Foundation清华大学自主科研项目

2022YFA14031002022YFA14032001227514812004270522722652022B1515120020

2024

10.1088/0256-307X/41/8/087402

中国物理快报(英文版)
中国科学院物理研究所,中国物理学会

中国物理快报(英文版)

CSTPCDEI
影响因子：0.515
ISSN：0256-307X
年,卷(期)：2024.41(8)