Lifshitz critical point in the cuprate superconductor YBa2Cu3Oy from high-field hall effect measurements

Lifshitz critical point in the cuprate superconductor YBa2Cu3Oy from high-field hall effect measurements

The Hall coefficient RH of the cuprate superconductor YBa2Cu3Oy was measured in magnetic fields up to 60 T for a hole concentration p from 0.078 to 0.152 in the underdoped regime. In fields large enough to suppress superconductivity, RH(T) is seen to go from positive at high temperature to negative...

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Veröffentlicht in:Physical review. B, Condensed matter and materials physics Condensed matter and materials physics, 2011-02, Vol.83
Hauptverfasser: Leboeuf, D., Doiron-Leyraud, N., Vignolle, Baptiste, Sutherland, M., Ramshaw, B.J., Levallois, J., Daou, R., Laliberté, F., Cyr-Choinière, O., Chang, J., Jo, Y.J., Balicas, L., Liang, R., Bonn, D.A., Hardy, W.N., Proust, Cyril, Taillefer, L.
Format: Artikel
Sprache:eng
Schlagworte:
Condensed Matter
Physics
Superconductivity
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Zusammenfassung:The Hall coefficient RH of the cuprate superconductor YBa2Cu3Oy was measured in magnetic fields up to 60 T for a hole concentration p from 0.078 to 0.152 in the underdoped regime. In fields large enough to suppress superconductivity, RH(T) is seen to go from positive at high temperature to negative at low temperature, for p>0.08. This change of sign is attributed to the emergence of an electron pocket in the Fermi surface at low temperature. At p
ISSN:1098-0121
1550-235X
DOI:10.1103/PhysRevB.83.054506