2003/02/26 by Yan Chen, Z. D. Wang, C. S. Ting · 11 citations
Materials Science · Physics and Astronomy · #Antiferromagnetism #Charge (physics) #Charge density wave #Charge ordering #Condensed matter physics #Hamiltonian (control theory) #Isotropy #Magnetic and transport properties of perovskites and related materials #Physics #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Quantum mechanics #Superconductivity #Thermodynamics #Transition temperature #Vortex #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.67.220501
published in Physical review. B, Condensed matter 67(22) (American Physical Society) · 5 pages, 5 figures
arxiv created 2003/02/26 · openalex publication_date 2003/06/03 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Using a model Hamiltonian with d-wave superconductivity and competing antiferromagnetic (AF) interactions, the temperature (T) dependence of the vortex charge in high-Tc superconductors is investigated by numerically solving the Bogoliubov--de Gennes equations. The strength of the induced AF order inside the vortex core is T dependent. The vortex charge could be negative when the AF order with sufficient strength is present at low temperatures. At higher temperatures, the AF order may be completely suppressed and the vortex charge becomes positive. A first-order-like transition in the T-dependent vortex charge is seen near the critical temperature TAF. For an underdoped sample, the spatial profiles of the induced spin-density wave and the charge-density wave orders could have stripelike structures at T<Ts, and change to two-dimensional isotropic ones at T>Ts. As a result, a vortex charge discontinuity occurs at Ts.