首页|Revisit of the anisotropic vortex states of 2H-NbSe2 towards the zero-field limit

Revisit of the anisotropic vortex states of 2H-NbSe2 towards the zero-field limit

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We revisited the vortex states of 2H-NbSe2 towards zero fields by a low-temperature scanning tunneling microscope.Fine structures of the anisotropic vortex states were distinguished,one is a spatially non-splitting zero bias peak,and the other is an in-gap conductance anomaly resembling evolved crossing features around the center of the three nearest vortices.Both of them distribute solely along the next nearest neighboring direction of the vortex lattice and become unresolved in much higher magnetic fields,implying an important role played by the vortex-vortex interactions.To clarify these issues,we have studied the intrinsic vortex states of the isolated trapped vortex in zero fields at 0.45 K.It is concluded that the anisotropic zero bias peak is attributed to the superconducting gap anisotropy,and the spatially evolved crossing features are related to the vortex-vortex interaction.The vortex core size under the zero-field limit is determined.These results provide a paradigm for studying the inherent vortex states of type-Ⅱ superconductors especially based on an isolated vortex.

vortex stateszero-bias conductance peakscanning tunneling microscopy

张凡、侯兴元、姜宇轩、张宗源、涂玉兵、朱相德、陈根富、单磊

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

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

Center of Free Electron Laser and High Magnetic Field,Anhui University,Hefei 230601,China

Information Materials and Intelligent Sensing Laboratory of Anhui Province,Institutes of Physical Science and Information Technology,Anhui University,Hefei 230601,China

Key Laboratory of Structure and Functional Regulation of Hybrid Materials in Anhui University,Ministry of Education,Hefei 230601,China

School of Physics and Materials Science,Anhui University,Hefei 230601,China

Anhui Key Laboratory of Condensed Matter Physics at Extreme Conditions,High Magnetic Field Laboratory,HFIPS,Anhui,Chinese Academy of Sciences,and University of Science and Technology of China,Hefei 230031,China

Hefei National Laboratory,Hefei 230088,China

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国家重点研发计划Innovation Program for Quantum Science and Technology国家自然科学基金国家自然科学基金国家自然科学基金Major Basic Program of Natural Science Foundation of Shandong Province国家自然科学基金安徽省自然科学基金

2022YFA14032032021ZD0302802120740021237413311804379ZR2021ZD01122740012208085MA09

2024

10.1088/1674-1056/ad362d

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(6)
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