Local-charge-density transfer and organic superconductivity: A positron study

Y. Lou; H. L. Yen; J. M. Wrobel; H. Zhang; Y. C. Jean; G. Saito; Z. J. Huang; C. W. Chu

doi:10.1103/PhysRevB.49.12255

Local-charge-density transfer and organic superconductivity: A positron study

Y. Lou, H. L. Yen, J. M. Wrobel, H. Zhang, Y. C. Jean, G. Saito, Z. J. Huang, C. W. Chu

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摘要

The temperature dependence between 4 and 294 K of the positron lifetime is measured in the organic superconductor -(BEDT-TTF)2Cu(NCS)2. The lifetime decreases rapidly with temperature from 350 to 343 ps below Tc, and increases monotonically above Tc to 372 ps. These experimental results are interpreted in terms of a transfer in the local charge density of organic superconductors associated with the superconducting transition. Theoretical positron density and positron-electron overlap distributions are calculated to support this interpretation.

原文	English
頁（從 - 到）	12255-12258
頁數	4
期刊	Physical Review B
卷	49
發行號	17
DOIs	https://doi.org/10.1103/PhysRevB.49.12255
出版狀態	Published - 1994

All Science Journal Classification (ASJC) codes

Condensed Matter Physics

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10.1103/PhysRevB.49.12255

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AU - Yen, H. L.

AU - Wrobel, J. M.

AU - Zhang, H.

AU - Jean, Y. C.

AU - Saito, G.

AU - Huang, Z. J.

AU - Chu, C. W.

PY - 1994

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AB - The temperature dependence between 4 and 294 K of the positron lifetime is measured in the organic superconductor -(BEDT-TTF)2Cu(NCS)2. The lifetime decreases rapidly with temperature from 350 to 343 ps below Tc, and increases monotonically above Tc to 372 ps. These experimental results are interpreted in terms of a transfer in the local charge density of organic superconductors associated with the superconducting transition. Theoretical positron density and positron-electron overlap distributions are calculated to support this interpretation.

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