Global and Local Measures of the Intrinsic Josephson Coupling in Tl2Ba2CuO6
A.A. Tsvetkov, D. van der Marel, K.A. Moler, J. R. Kirtley, J. L. de, Boer, A. Meetsma, Z.F. Ren, N. Koleshnikov, D. Dulic, A. Damascelli, M., Grueninger, J. Schuetzmann, J.W. van der Eb, H. S. Somal, and J.H. Wang
TL;DR
This paper measures the intrinsic Josephson coupling in Tl2Ba2CuO6 using infrared spectroscopy and vortex imaging, revealing a significant discrepancy with the interlayer tunneling model's predictions.
Contribution
It provides the first combined infrared and vortex imaging measurements of Josephson coupling in Tl2Ba2CuO6, challenging existing theoretical models.
Findings
Measured Josephson plasma frequency as 28 cm$^{-1}$
Identified a large discrepancy with interlayer tunneling model
Suggests need for revised understanding of coupling mechanisms
Abstract
The Intlerlayer Josephson coupling between the planes of Tl2Ba2CuO6 was determined using infrared spectroscopy and magnetic flux vortex imaging. These methods give a consistent value of = 28 cm which, when combined with the condensation energy produces a discrepancy of at least an order of magnitude with deductions based on the interlayer tunneling model.
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