Anomalous scattering rate and microwave absorption in $Bi_{2}Sr_{2}CaCu_{2}O_{8+δ}$ and $YBa_{2}Cu_{3}O_{7-δ}$

C. Kusko; Z. Zhai; R. S. Markiewicz; S. Sridhar

paper

Anomalous scattering rate and microwave absorption in $B i_{2} S r_{2} C a C u_{2} O_{8 + δ}$ and $Y B a_{2} C u_{3} O_{7 - δ}$

arXiv:cond-mat/0102288

Abstract

We determine the scattering rate from microwave measurements for an optimally doped Bi-2212 single crystal, using a simple two fluid model with a d-wave symmetry order parameter. In the superconducting state, the calculated scattering rate is three orders of magnitude smaller than that determined from ARPES experiments. A similar anomalously large decrease in the scattering rate is also required to explain the data within a gap-quasiparticle scenario for other HTS, such as $Y B a_{2} C u_{3} O_{7 - δ}$ . The results suggest that the assumption of normal excitations vanishing at low $T$ is invalid and an additional charge mode is responsible for the microwave absorption.

7 pages, 2 figures, Presented at International Workshop on HTS in High Frequency Fields, Capri, May 2000

Anomalous scattering rate and microwave absorption in Bi2​Sr2​CaCu2​O8+δ​ and YBa2​Cu3​O7−δ​

Abstract

Anomalous scattering rate and microwave absorption in $B i_{2} S r_{2} C a C u_{2} O_{8 + δ}$ and $Y B a_{2} C u_{3} O_{7 - δ}$