Next Article in Journal
Understanding Phase Stability of Metallic 1T-MoS2 Anodes for Sodium-Ion Batteries
Next Article in Special Issue
Evaluating Superconductors through Current Induced Depairing
Previous Article in Journal / Special Issue
Fermi-Bose Mixtures and BCS-BEC Crossover in High-Tc Superconductors
Open AccessArticle

Scaling between Superfluid Density and Tc in Overdoped La2−xSrxCuO4 Films

Department de Física, Universidade Federal Fluminese, 24210-346 Niterói, RJ, Brazil
Condens. Matter 2019, 4(2), 52; https://doi.org/10.3390/condmat4020052
Received: 19 April 2019 / Revised: 3 June 2019 / Accepted: 4 June 2019 / Published: 6 June 2019
(This article belongs to the Special Issue From cuprates to Room Temperature Superconductors)
We used an electronic phase separation approach to interpret the scaling between the low-temperature superfluid density average ρ sc ( 0 ) and the superconducting critical temperature T c on overdoped La 2 x Sr x CuO 4 films. Guided by the observed nematic and incommensurate charge ordering (CO), we performed simulations with a free energy that reproduces charge domains with wavelength λ C O and provides a scale to local superconducting interactions. Under these conditions a complex order parameter with amplitude Δ d ( r i ) and phase θ ( r i ) may develop at a domain i. We assumed that these domains are coupled by Josephson energy E J ( r i j ) , proportional to the local superfluid density ρ sc ( r i j ) . Long-range order occured when the average E J ( T c ) is k B T c . The linear ρ s c ( 0 ) vs. T c relation was satisfied whenever CO was present, even with almost vanishing charge amplitudes. View Full-Text
Keywords: cuprate supercondutores; electronic phase separation; superfluid density; Josephson effects cuprate supercondutores; electronic phase separation; superfluid density; Josephson effects
Show Figures

Figure 1

MDPI and ACS Style

de Mello, E.V.L. Scaling between Superfluid Density and Tc in Overdoped La2−xSrxCuO4 Films. Condens. Matter 2019, 4, 52.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop