Supercurrent effect in a charge density wave intertwined superconductor

Abstract

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.

Main text: 20 pages, 4 figures; Supplementary Information: 27 pages, 17 figures

References in corpus (23)

• Kwant: a software package for quantum transport
• Long-range incommensurate charge fluctuations in (Y,Nd)Ba2Cu3O(6+x)
• Direct observation of competition between superconductivity and charge density wave order in YBa2Cu3Oy
• The Kernel Polynomial Method
• Superconductivity in Cu_xTiSe_2
• Characterization of collective ground states in single-layer NbSe2
• Discovery of a Cooper-Pair Density Wave State in a Transition-Metal Dichalcogenide
• Using controlled disorder to probe the interplay between charge order and superconductivity in NbSe2
• Intrinsic atomic scale modulations of the superconducting gap of 2H-NbSe2
• Competition between charge-density-wave and superconductivity in the kagome metal RbV3Sb5
• Manipulating Majorana fermions using supercurrents
• Electron-phonon coupling and the Coexistence of Superconductivity and Charge-Density Wave in Monolayer NbSe2
• Magnetic-field sensitive charge density wave orders in the superconducting phase of UTe2
• Experimental evidence for a two-band superconducting state of NbSe2 single crystals
• Tuning topological superconductivity in helical Shiba chains by supercurrent
• Creating Majorana modes from segmented Fermi surface
• Current-enabled optical conductivity of superconductors
• Supercurrent-induced topological phase transitions
• Supercurrent induced resonant optical response
• Directly visualizing nematic superconductivity driven by the pair density wave in NbSe${}_2$
• Meissner effect induced Majorana zero modes at small magnetic field
• Lifshitz transitions and Weyl semimetals from a topological superconductor with supercurrent flow
• Two characteristic contributions to the superconducting state of 2$H$-NbSe${}_2$