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Journal club 22.06.08

Journal club 22.06.08. superflow. 4 He Ns – Ss. Cuprates Nc – PG – Sc. Ns. Nc. T (K). PG. Ss. Sc. Pressure (bar). Doping (h per CuO 2 ). T (K). T. No supercurrent. Strong phase fluct’s. Cuprates (Bi 2 Sr 2 CaCu 2 O 8 ) Nc – PG – Sc.

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Journal club 22.06.08

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  1. Journal club 22.06.08

  2. superflow 4He Ns – Ss Cuprates Nc – PG – Sc Ns Nc T (K) PG Ss Sc Pressure (bar) Doping (h per CuO2)

  3. T (K) T No supercurrent Strong phase fluct’s Cuprates (Bi2Sr2CaCu2O8) Nc – PG – Sc Y. Wang, L. Li and N.P. Ong Phys. Rev. B, 73, 024510 (2006) V 0 PG (above Tc): Vortex liquid Nernst signal -B Strong pair amplitude T (K)

  4. T (K) B Cuprates (Bi2Sr2CaCu2O8) Nc – PG – Sc Vortex liquid L. Li, Y. Wang, M.J. Naughton, S. Ono,Y. Ando and N.P. Ong, Europhys. Lett.,72, 451 (2005) Nonlinear susceptibility Incompressible Vortex liquid

  5. K 4He Ns – Ss T (K) • O. Penrose and L. Onsager, Phys. Rev. 104, 576 - 584 (1956): • “…one would not expect B.E. condensation in a solid …” • A.F. Andreev and I.M. Lifshitz Sov.Phys.JETP 29,1107–1113 (1969): • “Quantum theory of defects in crystals” • G. V. Chester, Phys. Rev. A 2, 256 - 258 (1970): • “…interacting bosons … exhibit both crystalline order and B.E. condensation…” • “…if there are vacancies…then a condensate exists…” • J. Leggett, Phys. Rev. Lett. 25, 1543 - 1546 (1970): • ”Nonclassical Rotational Inertia” A,w

  6. A K 4He Ns – Ss T (K) E. Kim and M.H.W. Chan, Nature 427, 225 (2004) Nonlinear susceptibility No direct observation of superflow A,w

  7. T (K) A B Cuprates Nc – PG – Sc 4He Ns–”PG”–Ss Ns “PG” SS Nonlinear cw No supercurrents found Nonlinear cB No supercurrents PG – Incompressible Vortex Liquid Strong pair amplitude + Strong phase fluctuations

  8. Bosonic PG = Vortex liquid 4He Cuprates Bosonic Neutral Fermionic Charged Fermionic PG superflow The end

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