Star-shaped Local Density of States around Vortices in a Type II Superconductor

Abstract

The electronic structure of vortices in a type II superconductor is analyzed within the quasi-classical Eilenberger framework. The possible origin of a sixfold ``star'' shape of the local density of states, observed by scanning tunneling microscope experiments on NbSe${}_2$, is examined in the light of the three effects; the anisotropic pairing, the vortex lattice, and the anisotropic density of states at the Fermi surface. Outstanding features of split parallel rays of this star are well explained in terms of an anisotropic $s$-wave pairing. This reveals a rich internal electronic structure associated with a vortex core.

4 pages, REVTeX, 3 figures available upon request

Cited by in corpus (44)

• Scanning tunneling spectroscopy of high-temperature superconductors
• Heat Conduction in the Vortex State of NbSe_2: Evidence for Multi-Band Superconductivity
• Superconducting density of states and vortex cores of 2H-NbS2
• Multiband superconductivity with sign-preserving order parameter in kagome superconductor CsV3Sb5
• Low-lying Quasiparticle Excitations around a Vortex Core in Quantum Limit
• Scanning Tunneling Microscopy/Spectroscopy of Vortices in LiFeAs
• Discovery of a Cooper-Pair Density Wave State in a Transition-Metal Dichalcogenide
• Unusual suppression of the superconducting energy gap and critical temperature in atomically thin NbSe2
• Imaging superconducting vortex core and lattice with the scanning tunneling microscope
• Local Electronic Structure of Defects in Superconductors
• Intrinsic atomic scale modulations of the superconducting gap of 2H-NbSe2
• Field dependence of the zero energy density of states around vortices in an anisotropic gap superconductor
• Vortex stabilization in Bose-Einstein condensate of alkali atom gas
• Local density of states in the vortex lattice in a type II superconductor
• Influence of the multiband sign changing superconductivity on the vortex cores and on vortex pinning in the new stoichiometric high Tc CaKFe4As4
• Effects of gap anisotropy upon the electronic structure around a superconducting vortex
• Chiral charge order in the superconductor 2H-TaS2
• Vortex structure in chiral p-wave superconductors
• Site-selective nuclear magnetic relaxation time in a superconducting vortex state
• Scanning tunneling spectroscopy with superconducting tips of Al
• Vortex State and Field-Angle Resolved Specific Heat Oscillation for H // ab in d-Wave Superconductors
• Violation of the Pauli-Clogston limit in a heavy Fermion superconductor CeRh${}_2$As${}_2$ --Duality of itinerant and localized 4f electrons--
• Quantum limiting behaviors of a vortex core in an anisotropic gap superconductor
• NMR relaxation time around a vortex in stripe superconductors
• Theory of quasiparticle vortex bound states in Fe-based superconductors: application to LiFeAs
• Local density of states around single vortices and vortex pairs: effect of boundaries and hybridization of vortex core states
• Millikelvin scanning tunneling microscope at 20/22 T with a graphite enabled stick-slip approach and an energy resolution below 8$\mu$eV: Application to conductance quantization at 20 T in single atom point contacts of Al and Au
• Ubiquitous V-shape density of states in mixed state of clean limit type II superconductors; STM experiment and theory
• Anisotropic vortices on superconducting Nb(110)
• Intrinsic vortex pinning in superconducting quasicrystals
• Anisotropic non-split zero-energy vortex bound states in a conventional superconductor
• Impurity Effect on Kramer-Pesch Core Shrinkage in s-Wave Vortex and Chiral p-Wave Vortex
• Field-angle-dependent low-energy excitations around a vortex in the superconducting topological insulator CuxBi2Se3
• Electronic structure and spin-lattice relaxation in superconducting vortex states on the kagome lattice near van Hove filling
• Observation of in-gap states in a two-dimensional CrI2/NbSe2 heterostructure
• Visualizing the elongated vortices in $\gamma$-Ga nanostrips
• Scanning tunnelling spectroscopy of the vortex state in NbSe2 using a superconducting tip
• Self-consistent electronic structure of multiquantum vortices in superconductors at $T\ll T_c$
• Absence of hexagonal to square structural transition in LiFeAs vortex matter
• Signatures of unconventional pairing in near-vortex electronic structure of LiFeAs
• Necklace-like pattern of vortex bound states
• Superconductivity and vortex structure on Bi${}_2$Te${}_3$/FeTe${}_{0.55}$Se${}_{0.45}$ heterostructures with different thickness of Bi${}_2$Te${}_3$ films
• Quantized bound states around a vortex in anisotropic superconductors
• Quantum interference among vortex bound states in superconductors