dorsal/arxiv
View SchemaLow temperature thermal conductivity of Zn-doped YBCO: evidence for impurity-induced electronic bound states
| Authors | K. Behnia, H. Aubin, L. Taillefer, R. Gagnon |
|---|---|
| Categories | |
| ArXiv ID | supr-con/9604002 |
| URL | https://arxiv.org/abs/supr-con/9604002 |
Abstract
The thermal conductivity of Zn-doped YBCO crystals was studied at low temperature (0.15 < T < 0.8 K) for different concentrations of Zn impurities. A small amount of Zn induces a dramatic decrease in the non-linear component of the low-temperature thermal conductivity. Moreover, the magnitude of the linear component (obtained by extrapolating the data to T=0) is found to depend on Zn concentration. After an initial decrease, this linear term, associated with the electronic contribution to the conductivity, increases with increasing Zn dopage. Such an increase is consistent with the introduction of low-energy excitations by Zn impurities as expected for a $d_{x^2-y^2}$ superconducting state in contrast to an anisotropic s-wave gap. The results are compared to quantitative predictions of available theoretical models.
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"abstract": "The thermal conductivity of Zn-doped YBCO crystals was studied at low\ntemperature (0.15 \u003c T \u003c 0.8 K) for different concentrations of Zn impurities. A\nsmall amount of Zn induces a dramatic decrease in the non-linear component of\nthe low-temperature thermal conductivity. Moreover, the magnitude of the linear\ncomponent (obtained by extrapolating the data to T=0) is found to depend on Zn\nconcentration. After an initial decrease, this linear term, associated with the\nelectronic contribution to the conductivity, increases with increasing Zn\ndopage. Such an increase is consistent with the introduction of low-energy\nexcitations by Zn impurities as expected for a $d_{x^2-y^2}$ superconducting\nstate in contrast to an anisotropic s-wave gap. The results are compared to\nquantitative predictions of available theoretical models.",
"arxiv_id": "supr-con/9604002",
"authors": [
"K. Behnia",
"H. Aubin",
"L. Taillefer",
"R. Gagnon"
],
"categories": [
"supr-con",
"cond-mat.supr-con"
],
"title": "Low temperature thermal conductivity of Zn-doped YBCO: evidence for impurity-induced electronic bound states",
"url": "https://arxiv.org/abs/supr-con/9604002"
},
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