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Specific heat of low-Tc Tl2Ba2CuO6+δ

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Carrington, A., Mackenzie, A. P., & Tyler, A. (1996). Specific heat of low-Tc Tl2Ba2CuO6+δ. Physical Review B, 54(6), R3788-91. doi:10.1103/PhysRevB.54.R3788.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0018-EC26-1
Abstract
A sensitive differential ac technique has been used to measure the specific heat of low-T c single-crystal Tl 2Ba 2CuO 6+delta (T cap15 K) in fields up to 7 T applied parallel to the c axis. In contrast to high-T c cuprates where a magnetic field substantially broadens the resistive transition, in these low-T c samples, the field simply shifts the transition to lower temperatures leaving its width unchanged. Our specific-heat results, however, show a quite different behavior. The superconducting anomaly is dramatically reduced in size and broadened by the field, suggesting, in analogy with other cuprates,the presence of strong thermal-fluctuation effects.