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arXiv cond-mat/9810323cond-mat.supr-concond-mat.str-el
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YBa_2Cu_3O_6.9涡旋态的准粒子输运

Quasiparticle transport in the vortex state of YBa_2Cu_3O_6.9

May Chiao, R. W. Hill, Christian Lupien, Bojana Popic, Robert Gagnon, Louis Taillefer

摘要:

通过测量YBa_2Cu_3O_(6.9)在高达8 T的磁场中的低温热导率,研究了涡旋对铜氧化物超导体中准粒子输运的影响。剩余的线性项(如T \to 0)被发现与字段增加,直接反映了扩展准粒子态的占领。不同的锌杂质浓度的研究揭示了一个很好的协议与最近的计算d-波超导体,从而揭示了散射的杂质和涡旋的性质。它还提供了节点附近的间隙的定量测量。

英文摘要:

The effect of vortices on quasiparticle transport in cuprate superconductors was investigated by measuring the low temperature thermal conductivity of YBa_2Cu_3O_6.9 in magnetic fields up to 8 T. The residual linear term (as T \to 0) is found to increase with field, directly reflecting the occupation of extended quasiparticle states. A study for different Zn impurity concentrations reveals a good agreement with recent calculations for a d-wave superconductor, thereby shedding light on the nature of scattering by both impurities and vortices. It also provides a quantitative measure of the gap near the nodes.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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