Vortex Lattice in Bi2Sr2CaCu2O8+δ Well Above the First-Order Phase-Transition Boundary
نویسندگان
چکیده
Measurements of non-local in-plane resistance originating from transverse vortexvortex correlations have been performed on a Bi2Sr2CaCu2O8+δ high-Tc superconductor in a magnetic field up to 9 T applied along the crystal c-axis. Our results demonstrate that a rigid vortex lattice does exist over a broad portion of the magnetic field – temperature (H-T) phase diagram, well above the first-order transition boundary HFOT (T). The results also provide evidence for the vortex lattice melting and vortex liquid decoupling phase transitions, occurring above the HFOT (T).
منابع مشابه
Josephson Plasma Resonance in Solid and Glass Phases of Bi 2 Sr 2 Cacu 2 O 8+δ
Vortex matter phases and phase transitions are investigated by means of Josephson plasma resonance in underdoped Bi2Sr2CaCu2O8+δ single crystals in a microwave frequency range between 19 and 70 GHz. Accompanied by the vortex lattice melting transition, a jump of the interlayer phase coherence extracted from the field dependence of the plasma frequency was observed. In the solid phase, the inter...
متن کاملLangevin Simulation of Nonlocal Ginzburg-Landau Model for Superconductors in a Magnetic Field
We numerically investigate the phenomenological nonlocal Ginzburg-Landau Hamiltonian for two-dimensional superconductors in a strong magnetic field by Langevin equation. We calculate the structure factor and Abrikosov factor at various temperatures. We also evaluate the specific heat and obtain a cusp which indicates the melting of the vortex lattice. PACS numbers: 74.20.De, 74.60.Ge Typeset us...
متن کاملVortex liquid correlations induced by in-plane field in underdoped Bi2Sr2CaCu2O8+δ
By measuring the Josephson Plasma Resonance, we have probed the influence of an in-plane magnetic field on the pancake vortex correlations along the c-axis in heavily underdoped Bi2Sr2CaCu2O8+δ (Tc = 72.4 ± 0.6 K) single crystals both in the vortex liquid and in the vortex solid phase. Whereas the in-plane field enhances the interlayer phase coherence in the liquid state close to the melting li...
متن کاملKosterlitz-Thouless Transitions in Bi2Sr2CaCu2O8+δ Thin Films by Vortex String
Current-voltage (I − V ) characteristics and the increase of superconducting transition temperature Tc as a function of the number of half-unit-cell layers n are studied on Bi2Sr2CaCu2O8+δ thin films grown by molecular beam epitaxy. These observations are interpreted in terms of Kosterlitz-Thouless (KT) transition associated with vortex string threading the film. Considering the change in the t...
متن کاملSpin and Charge Order in the Vortex Lattice of the Cuprates: Experiment and Theory
I summarize recent results, obtained with E. Demler, K. Park, A. Polkovnikov, M. Vojta, and Y. Zhang, on spin and charge correlations near a magnetic quantum phase transition in the cuprates. STM experiments on slightly overdoped Bi2Sr2CaCu2O8+δ (J. E. Hoffman et al., Science 295, 466 (2002)) are consistent with the nucleation of static charge order coexisting with dynamic spin correlations aro...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2003