TY - JOUR
T1 - Nernst and seebeck coefficients of the cuprate superconductor YBa2Cu3O6.67
T2 - A Study of fermi surface reconstruction
AU - Chang, J.
AU - Daou, R.
AU - Proust, Cyril
AU - Leboeuf, David
AU - Doiron-Leyraud, Nicolas
AU - Laliberté, Francis
AU - Pingault, B.
AU - Ramshaw, B. J.
AU - Liang, Ruixing
AU - Bonn, D. A.
AU - Hardy, W. N.
AU - Takagi, H.
AU - Antunes, A. B.
AU - Sheikin, I.
AU - Behnia, K.
AU - Taillefer, Louis
PY - 2010/2/5
Y1 - 2010/2/5
N2 - The Seebeck and Nernst coefficients S and ν of the cuprate superconductor YBa2Cu3Oy (YBCO) were measured in a single crystal with doping p=0.12 in magnetic fields up to H=28T. Down to T=9 K, ν becomes independent of field by H 30T, showing that superconducting fluctuations have become negligible. In this field-induced normal state, S/T and ν/T are both large and negative in the T→0 limit, with the magnitude and sign of S/T consistent with the small electronlike Fermi surface pocket detected previously by quantum oscillations and the Hall effect. The change of sign in S(T) at T 50 K is remarkably similar to that observed in La2-xBaxCuO4, La2-x-yNdySrxCuO4, and La2-x-yEuySrxCuO4, where it is clearly associated with the onset of stripe order. We propose that a similar density-wave mechanism causes the Fermi surface reconstruction in YBCO.
AB - The Seebeck and Nernst coefficients S and ν of the cuprate superconductor YBa2Cu3Oy (YBCO) were measured in a single crystal with doping p=0.12 in magnetic fields up to H=28T. Down to T=9 K, ν becomes independent of field by H 30T, showing that superconducting fluctuations have become negligible. In this field-induced normal state, S/T and ν/T are both large and negative in the T→0 limit, with the magnitude and sign of S/T consistent with the small electronlike Fermi surface pocket detected previously by quantum oscillations and the Hall effect. The change of sign in S(T) at T 50 K is remarkably similar to that observed in La2-xBaxCuO4, La2-x-yNdySrxCuO4, and La2-x-yEuySrxCuO4, where it is clearly associated with the onset of stripe order. We propose that a similar density-wave mechanism causes the Fermi surface reconstruction in YBCO.
U2 - 10.1103/PhysRevLett.104.057005
DO - 10.1103/PhysRevLett.104.057005
M3 - Article
AN - SCOPUS:76249120187
SN - 0031-9007
VL - 104
JO - Physical Review Letters
JF - Physical Review Letters
IS - 5
M1 - 057005
ER -