Change of quasiparticle dispersion in crossing Tc in the underdoped cuprates

One of the most remarkable properties of the high-temperature superconductors is a pseudogap regime appearing in the underdoped cuprates above the superconducting transition temperature T_c. The pseudogap continously develops out of the superconducting gap. In this paper, we demonstrate by means of a detailed comparison between theory and experiment that the characteristic change of quasiparticle dispersion in crossing T_c in the underdoped cuprates can be understood as being due to phase fluctuations of the superconducting order parameter. In particular, we show that within a phase fluctuation model the characteristic back-turning BCS bands disappear above T_c whereas the gap remains open. Furthermore, the pseudogap rather has a U-shape instead of the characteristic V-shape of a d_{x^2-y^2}-wave pairing symmetry and starts closing from the nodal k=(pi/2,pi/2) directions, whereas it rather fills in at the anti-nodal k=(pi,0) regions, yielding further support to the phase fluctuation scenario.

[1]  G. Strinati,et al.  Pairing fluctuation effects on the single-particle spectra for the superconducting state. , 2003, Physical review letters.

[2]  C. Honerkamp,et al.  Staggered flux vortices and the superconducting transition in the layered cuprates. , 2003, Physical review letters.

[3]  Timur K. Kim,et al.  Anomalous enhancement of the coupling to the magnetic resonance mode in underdoped Pb-Bi2212. , 2003, Physical review letters.

[4]  H. Matsui,et al.  BCS-like Bogoliubov quasiparticles in high-T(c) superconductors observed by angle-resolved photoemission spectroscopy. , 2003, Physical Review Letters.

[5]  C. Honerkamp,et al.  Staggered flux fluctuations and the quasiparticle scattering rate in the SU(2) gauge theory of the t-J model. , 2002, Physical review letters.

[6]  W. Hanke,et al.  Phase-fluctuation-induced reduction of the kinetic energy at the superconducting transition , 2002, cond-mat/0207425.

[7]  M. Knupfer,et al.  Origin of the Peak-Dip-Hump Line Shape in the Superconducting-State ; 0 Photoemission Spectra of Bi2Sr2CaCu2O8 , 2002 .

[8]  M. Knupfer,et al.  Superconducting gap in the presence of bilayer splitting in underdoped (Pb,Bi)2Sr2CaCu2O8? ? , 2002, cond-mat/0204557.

[9]  R. Greene,et al.  Evidence of a d- to s-wave pairing symmetry transition in the electron-doped cuprate superconductor Pr(2-x)CexCuO4. , 2001, Physical review letters.

[10]  W. Hanke,et al.  Pair phase fluctuations and the pseudogap , 2001, cond-mat/0110377.

[11]  I. Herbut.  Antiferromagnetism from phase disordering of a d-wave superconductor. , 2001, Physical review letters.

[12]  John A. Skinta,et al.  Evidence for a transition in the pairing symmetry of the electron-doped cuprates La(2-x)Ce(x)CuO(4-y) and Pr(2-x)Ce(x)CuO(4-y). , 2001, Physical review letters.

[13]  M. Knupfer,et al.  Origin of the peak-dip-hump structure in the photoemission spectra of Bi2212 , 2001, cond-mat/0110379.

[14]  C. Renner,et al.  Scanning tunneling spectroscopy of Bi(2)Sr(2)CuO(6+delta): new evidence for the common origin of the pseudogap and superconductivity. , 2001, Physical review letters.

[15]  M. Franz,et al.  Algebraic Fermi liquid from phase fluctuations: "topological" fermions, vortex "berryons," and QED3 theory of cuprate superconductors. , 2000, Physical review letters.

[16]  J. Mésot,et al.  Temperature evolution of the spectral peak in high-temperature superconductors , 2000, cond-mat/0012335.

[17]  M. Franz,et al.  Algebraic Fermi Liquid from Phase Fluctuations , 2001 .

[18]  C. Renner,et al.  Scanning Tunneling Spectroscopy of Bi2Sr2CuO6 + 8 , 2001 .

[19]  J. Eckstein,et al.  Signature of superfluid density in the single-particle excitation spectrum of Bi2Sr2CaCu2O8+δ , 2000, cond-mat/0009306.

[20]  M. Randeria,et al.  Effective actions and phase fluctuations in d-wave superconductors , 2000, cond-mat/0002349.

[21]  A. Marx,et al.  Anomalous Low Temperature Behavior of Superconducting Nd 1.85 Ce 0.15 CuO 4-y , 1999, cond-mat/9908320.

[22]  R. Micnas,et al.  Superconductivity with Local, Short-Range Attraction , 1999 .

[23]  Grenoble,et al.  Effective action for superconductors and BCS-Bose crossover , 1999, cond-mat/9901305.

[24]  M. Randeria,et al.  Superconducting gap anisotropy and quasiparticle interactions: A doping dependent photoemission study , 1998, cond-mat/9812377.

[25]  A. Dorsey,et al.  Effect of phase fluctuations on the single-particle properties of underdoped cuprates , 1998, cond-mat/9809225.

[26]  A. Millis,et al.  Phase fluctuations and spectral properties of underdoped cuprates , 1998, cond-mat/9805401.

[27]  M. Randeria,et al.  Destruction of the Fermi surface in underdoped high-Tc superconductors , 1997, Nature.

[28]  V. J. Emery,et al.  Importance of phase fluctuations in superconductors with small superfluid density , 1995, Nature.