Correlation between oxygen isotope effects on the transition temperature and the magnetic penetration depth in high-temperature superconductors close to optimal doping

Abstract

The oxygen-isotope (^{16}O/^{18}O) effect (OIE) on the in-plane magnetic penetration depth λ_{ab}(0) in optimally-doped YBa_2Cu_3O_{7-δ} and La_{1.85}Sr_{0.15}CuO_4, and in slightly underdoped YBa_2Cu_4O_8 and Y_{0.8}Pr_{0.2}Ba_2Cu_3O_{7-δ} was studied by means of muon-spin rotation. A substantial OIE on λ_{ab}(0) with an OIE exponent β_O=-d\lnλ_{ab}(0)/d\ln M_O\approx - 0.2 (M_O is the mass of the oxygen isotope), and a small OIE on the transition temperature T_c with an OIE exponent α_O=-d\ln T_{c}/d \ln M_O\simeq0.02 to 0.1 were observed. The observation of a substantial isotope effect on λ_{ab}(0), even in cuprates where the OIE on T_c is small, indicates that lattice effects play an important role in cuprate HTS.

6 pages, 4 figures

References in corpus (12)

• The superfluid density in cuprate high-Tc superconductors - a new paradigm
• Direct observation of the oxygen isotope effect on the in-plane magnetic field penetration depth in optimally doped YBa${}_2$Cu${}_3$O${}_{7-\delta }$
• Oxygen isotope effect on the in-plane penetration depth in underdoped La_{2-x}Sr_{x}CuO_{4} single crystals
• Polaron formation as origin of unconventional isotope effects in cuprate superconductors
• Isotope Effect in the Superfluid Density of HTS Cuprates: Stripes, Pseudogap and Impurities
• Oxygen-isotope effect on the in-plane penetration depth in cuprate superconductors
• Isotope effects in underdoped cuprate superconductors: a quantum phenomenon
• Site-selective oxygen isotope effect on the magnetic field penetration depth in underdoped Y${}_{0.6}$Pr${}_{0.4}$Ba${}_2$Cu${}_3$O${}_{7-\delta }$
• Oxygen-isotope effect on the in-plane penetration depth in underdoped Y_{1-x}Pr_xBa_2Cu_3O_{7-delta} as revealed by muon-spin rotation
• Electrostatic Modulation of the Superfluid Density in a Ultrathin La2-xSrxCuO4 Film
• Implications evinced by the phase diagram, anisotropy, magnetic penetration depths, isotope effects and conductivities of cuprate superconductors
• Relationship between the isotope effects on transition temperature, specific heat and penetration depths

Cited by in corpus (9)

• Electron-lattice interaction and its impact on high Tc superconductivity
• Oxygen isotope effect on superconductivity and magnetism in Y_1-xPr_xBa_2Cu_3O_7-δ
• Time-reversal invariant and fully gapped unconventional superconducting state in the bulk of the topological Nb0.25Bi2Se3
• Magnetic field dependence of the oxygen isotope effect on the magnetic penetration depth in hole-doped cuprate superconductors
• Effects of phonon interaction on the pairing in the high-T$c$ superconductors
• Concerning the superconducting gap symmetry in YBa2Cu3O7-δ, YBa2Cu4O8, and La2-xSrxCuO4 determined from muon spin rotation in mixed states of crystals and powders
• London penetration depth in the tight binding approximation: Orthorhombic distortion and oxygen isotope effects in cuprates
• Oxygen isotope effect on the superfluid density within the $d-$wave and $s-$wave pairing channels of YBa${}_2$Cu${}_4$O${}_8$
• Isotope effect on the transition temperature $T_c$ in Fe-based superconductors: the current status