2026/05/30 by Zhen Zhu, Z G Zhu, Wei Cheng +20
Materials Science · Physics and Astronomy · #Anisotropy #Charge (physics) #Charge density wave #Diamagnetism #Iron-based superconductors research #Organic and Molecular Conductors Research #Physics of Superconductivity and Magnetism #Quantum tunnelling #Quasiparticle #Superconductivity #Supercurrent #Symmetry breaking
paper · pdf · open access · doi:10.1038/s41467-026-73778-7
published in Nature Communications 17(1) (Nature Portfolio)
openalex publication_date 2026/05/30 · openalex created_date 2026/05/31 · openalex updated_date 2026/08/05
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. Scanning tunneling spectroscopic imaging reveals a field-driven symmetry breaking of CDW modulations in superconducting NbSe₂. Model calculations suggest that the observed anisotropy originates from a Doppler-shift-induced reconstruction of the dispersion of Bogoliubov quasiparticle excitations.