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<p>The energy-momentum (<i>E</i>-k) dispersion of quasiparticles constitutes a fundamental concept in condensed matter systems. The ability to modify the <i>E</i>-k dispersion, exemplified by supercurrent-induced Doppler shifts of Bogoliubov quasiparticle spectra in superconductors, enables manipulation of various emergent quantum properties. However, investigations into the supercurrent effect on superconductors intertwined with charge orders remain scarce. Here, we report that the Meissner current, generated by the diamagnetic response to an applied in-plane magnetic field, can tailor Bogoliubov quasiparticle excitations at the precursor charge density wave (CDW) vectors. Our scanning tunneling spectroscopic imaging reveals a field-driven symmetry breaking of CDW modulations, specifically a C<sub>3v</sub>-to-C<sub>s</sub> transition, in superconducting NbSe<sub>2</sub>. Model calculations suggest that the observed anisotropy originates from a selective Doppler-shift-induced <i>E</i>-k dispersion reconstruction. Furthermore, altering the field direction enables on-demand tuning of anisotropic CDW modulations and visualization of their momentum-space distribution. These results highlight a novel mechanism for controlling emergent electronic phases through momentum-space engineering.</p>

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Supercurrent effect in a charge density wave intertwined superconductor

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年5月30日

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  • Zhen Zhu,
  • Wei Cheng,
  • Dang Liu,
  • Pengyu Hu,
  • Yi Yang,
  • Qiaoyan Yu,
  • Shasha Xue,
  • Ruijun Xi,
  • Xingsen Chen,
  • Jice Sun,
  • Dandan Guan,
  • Yaoyi Li,
  • Shiyong Wang,
  • Canhua Liu,
  • Zhuan Xu,
  • Xin Liu,
  • Hao Zheng,
  • Jinfeng Jia

摘要

The energy-momentum (E-k) dispersion of quasiparticles constitutes a fundamental concept in condensed matter systems. The ability to modify the E-k dispersion, exemplified by supercurrent-induced Doppler shifts of Bogoliubov quasiparticle spectra in superconductors, enables manipulation of various emergent quantum properties. However, investigations into the supercurrent effect on superconductors intertwined with charge orders remain scarce. Here, we report that the Meissner current, generated by the diamagnetic response to an applied in-plane magnetic field, can tailor Bogoliubov quasiparticle excitations at the precursor charge density wave (CDW) vectors. Our scanning tunneling spectroscopic imaging reveals a field-driven symmetry breaking of CDW modulations, specifically a C3v-to-Cs transition, in superconducting NbSe2. Model calculations suggest that the observed anisotropy originates from a selective Doppler-shift-induced E-k dispersion reconstruction. Furthermore, altering the field direction enables on-demand tuning of anisotropic CDW modulations and visualization of their momentum-space distribution. These results highlight a novel mechanism for controlling emergent electronic phases through momentum-space engineering.