Magnetic field-induced soft mode in spin-gapped high-Tc superconductors

Abstract

We present an explanation of the dynamical in-gap spin mode in LSCO induced by an applied magnetic field H as recently observed by J. Chang et al. Our model consists of a phenomenological spin-only Hamiltonian, and the softening of the spin mode is caused by vortex pinning of dynamical stripe fluctuations which we model by a local ordering of the exchange interactions. The spin gap vanishes experimentally around H=7T which in our scenario corresponds to the field required for overlapping vortex regions.

4 pages, 3 figs

References in corpus (47)

• Quantum oscillations and the Fermi surface in an underdoped high-Tc superconductor
• A Four-Unit-Cell Periodic Pattern of Quasiparticle States Surrounding Vortex Cores in Bi2Sr2CaCu2O8+d
• Quantum Monte Carlo with Directed Loops
• Spin waves and electronic interactions in La2CuO4
• Antiferromagnetic Order Induced by an Applied Magnetic Field in a High-Temperature Superconductor
• Spins in the Vortices of a High Temperature Superconductor
• Superconducting Vortex with Antiferromagnetic Core
• Spin ordering quantum transitions of superconductors in a magnetic field
• Two energy scales in the spin excitations of the high-T_c superconductor La${}_{2-x}$Sr${}_x$CuO${}_4$
• Direct relation between the low-energy spin excitations and superconductivity of overdoped high-$T_c$ superconductors
• Tuning competing orders in La2-xSrxCuO4 cuprate superconductors by the application of an external magnetic field
• Enhancement of long-range magnetic order by magnetic field in superconducting La2CuO(4+y)
• Distinguishing Patterns of Charge Order: Stripes or Checkerboards
• Spin gap and magnetic coherence in a clean high-T_c superconductor
• Incommensurate Magnetism around Vortices and Impurities in High-$T_c$ Superconductors
• Magnetic-field-enhanced incommensurate magnetic order in the underdoped high-temperature superconductor YBa(2)Cu(3)O(6.45)
• Unifying Magnons and Triplons in Stripe-Ordered Cuprate Superconductors
• Magnetic order and superconductivity in LSCO: a review
• Superconducting Puddles and "Colossal'' Effects in Underdoped Cuprates
• Field-induced transition between magnetically disordered and ordered phases in underdoped La(2-x)SrxCuO4
• Spin excitations in fluctuating stripe phases of doped cuprate superconductors
• Using the average spectrum method to extract dynamics from quantum Monte Carlo simulations
• Magnetic excitations in a bond-centered stripe phase: Spin waves far from the semi-classical limit
• Disorder-Induced Static Antiferromagnetism in Cuprate Superconductors
• Evidence for an incommensurate magnetic resonance in La(2-x)Sr(x)CuO(4)
• Competing Order in the Mixed State of High Temperature Superconductors
• From stripe to checkerboard order on the square lattice in the presence of quenched disorder
• Spin dynamics of stripes
• Spin Waves in Striped Phases
• Field-induced soft-mode quantum phase transition in La${}_{1.855}$Sr${}_{0.145}$CuO${}_4$
• Novel in-gap spin state in Zn-doped La_1.85Sr_0.15CuO_4
• Effect of a magnetic field on the spin- and charge-density wave order in La1.45Nd0.4Sr0.15CuO4
• Hole concentration dependence of the magnetic moment in superconducting and insulating La2-xSrxCuO4
• Theory of Magnetic Field Induced Spin Density Wave in High Temperature Superconductors
• Spin dynamics in the stripe phase of the cuprates
• SO(5) theory of insulating vortex cores in high-$T_c$ materials
• Neutron scattering study of the effects of dopant disorder on the superconductivity and magnetic order in stage-4 La_2CuO_{4+y}
• Breakdown of universal transport in correlated d-wave superconductors
• Magnetic field induced enhancement of spin-order peak intensity in La(1.875)Ba(0.125)CuO(4)
• NMR relaxation time around a vortex in stripe superconductors
• Low-frequency spins and the ground state in high-Tc cuprates
• Checkerboard local density of states in striped domains pinned by vortices
• Unusual interplay between copper-spin and vortex dynamics in slightly overdoped La{1.83}Sr{0.17}CuO{4}
• Modelling Magnetic Fluctuations in the Stripe Ordered State
• Magnetic field effects and magnetic anisotropy in lightly doped La_{2-x}Sr_xCuO_4
• Recursion method for the quasiparticle structure of a single vortex with induced magnetic order
• Magnetic Excitations of Coupled Spin Ladders: a Quantum Monte Carlo Study

Cited by in corpus (6)

• Disorder-induced freezing of dynamical spin fluctuations in underdoped cuprates
• Spin density wave induced disordering of the vortex lattice in superconducting La${}_{2-x}$Sr${}_x$CuO${}_4$
• Modeling a striped pseudogap state
• Effects of impurities and vortices on the low-energy spin excitations in high-Tc materials
• Local magnetization nucleated by non-magnetic impurities in Fe-based superconductors
• Field-induced inter-planar correlations in the high-temperature superconductor La1.88Sr0.12CuO4