Signature of Orbital Driven Finite Momentum Pairing in a 3D Ising Superconductor
arXiv:2407.10352 · doi:10.1038/s41467-025-61882-z
Abstract
The finite momentum superconducting pairing states (FMPs), where Cooper pairs carry non-zero momentum, are believed to give rise to exotic physical phenomena including the pseudogap phase of cuprate high-Tc superconductors and Majorana fermions in topological superconductivity. FMPs can emerge in intertwined electronic liquids with strong spin-spin interactions or be induced by lifting the spin degeneracy under magnetic field as originally proposed by Fulde-Ferrell and Larkin-Ovchinnikov. In quantum materials with strong Ising-type spin-orbit coupling, such as the 2D transition metal dichalcogenides (TMDs), the spin degree of freedom is frozen enabling novel orbital driven FMPs via magnetoelectric effect. While evidence of orbital driven FMPs has been revealed in bilayer TMDs, its realization in 3D bulk materials remains an unresolved challenge. Here we report experimental signatures of FMP in a locally noncentrosymmetric bulk superconductor 4Hb-TaS2. Using hard X-ray diffraction and angle-resolved photoemission spectroscopy, we reveal unusual 2D chiral charge density wave (CDW) and weak interlayer hopping in 4Hb-TaS2. Below the superconducting transition temperature, the upper critical field, Hc2, linearly increases via decreasing temperature, and well exceeds the Pauli limit, thus establishing the dominant orbital pair-breaking mechanism. Remarkably, we discover a field-induced superconductivity-to-superconductivity transition that breaks continuous rotational symmetry of the s-wave uniform pairing in the Bardeen-Cooper-Schrieffer theory down to the six-fold rotation symmetry. Combining with a Ginzburg-Landau free energy analysis that incorporates magnetoelectric effect, our observations provide strong evidence of orbital driven FMP in the 3D quantum heterostructure 4Hb-TaS2.
References in corpus (46)
- Evidence of Ising pairing in superconducting NbSe atomic layers
- Three-band tight-binding model for monolayers of group-VIB transition metal dichalcogenides
- Two Dimensional Ising Superconductivity in Gated MoS
- Roton pair density wave and unconventional strong-coupling superconductivity in a topological kagome metal
- Fulde-Ferrell-Larkin-Ovchinnikov State in Heavy Fermion Superconductors
- The Physics of Pair Density Waves
- Tuning Ising superconductivity with layer and spin-orbit coupling in two-dimensional transition-metal dichalcogenides
- Resonant x-ray scattering studies of charge order in cuprates
- Two-Dimensional Superconducting Fluctuations in Stripe-Ordered La(1.875)Ba(0.125)CuO(4)
- Is 1T-TaS a 40 year old quantum spin liquid?
- Detection of a Cooper-Pair Density Wave in BiSrCaCuO
- Dynamical layer decoupling in a stripe-ordered, high T_c superconductor
- Calorimetric Evidence for a Fulde-Ferrell-Larkin-Ovchinnikov Superconducting State in the Layered Organic Superconductor κ_2_2$
- Helical vortex phase in the non-centrosymmetric CePt_3Si
- Visualizing Exotic Orbital Texture in the Single-Layer Mott Insulator 1T-TaSe2
- Pair Density Wave in the Pseudogap State of High Temperature Superconductors
- Mottness versus unit-cell doubling as the driver of the insulating state in 1T-TaS2
- Chiral charge-density-waves
- Evidence of Andreev bound states as a hallmark of the FFLO phase in -(BEDT-TTF)Cu(NCS)
- Topological Fulde-Ferrel-Larkin-Ovchinnikov states in Spin-orbit Coupled Fermi Gases
- Enhanced Superconductivity and Suppression of Charge-density Wave Order in 2H-TaS in the Two-dimensional Limit
- Observation of a ferro-rotational order coupled with second-order nonlinear optical fields
- Visualization of Topological Boundary Modes Manifesting Topological Nodal-Point Superconductivity
- Detection of a Pair Density Wave State in UTe
- Evidence for an FFLO state with segmented vortices in the BCS-BEC-crossover superconductor FeSe
- Orbital Fulde-Ferrell-Larkin-Ovchinnikov state in an Ising superconductor
- Unconventional superconductivity in bilayer transition metal dichalcogenides
- Discovery of a pair density wave state in a monolayer high-Tc iron-based superconductor
- Superconductivity and Local Inversion-Symmetry Breaking
- Chiral kagome superconductivity modulations with residual Fermi arcs in KV3Sb5 and CsV3Sb5
- Thermodynamic evidence for the Fulde-Ferrell-Larkin-Ovchinnikov state in the KFe2As2 superconductor
- Magnetic-field sensitive charge density wave orders in the superconducting phase of UTe2
- Smectic Pair Density Wave Order in EuRbFe4As4
- Chirality and Orbital Order in Charge Density Waves
- Visualization of Chiral Electronic Structure and Anomalous Optical Response in a Material with Chiral Charge Density Waves
- Roles of the Narrow Electronic Band near the Fermi Level in 1T-TaS-Related Layered Materials
- Topological metals and finite-momentum superconductors
- Gapless topological Fulde-Ferrell superfluidity in spin-orbit coupled Fermi gases
- Chiral to Nematic Crossover in the Superconducting State of 4Hb-TaS
- Evidence of a two-component order parameter in 4Hb-TaS2 in the Little-Parks effect
- Topological Pair-Density-Wave Superconducting States
- Nematic Ising superconductivity with hidden magnetism in few-layer 6R-TaS2
- A mechanism for phase shifts in Little-Parks experiments: application to 4Hb-TaS and to 2H-TaS intercalated with chiral molecules
- Extreme orbital ab-plane upper critical fields far beyond Pauli limit in 4Hb-Ta(S, Se)2 bulk crystals
- Inhomogeneous superconducting states in two weakly linked superconducting ultra thin films
- Charge Density Waves in the 2.5-Dimensional Quantum Heterostructure