Effect of zero-energy bound states on macroscopic quantum tunneling in high- T c superconductor junctions
Effect of zero-energy bound states on macroscopic quantum tunneling in high- T c superconductor junctions
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DOI：
10.1103/physrevb.72.052506
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发表时间：
2005-01
影响因子：
3.7
通讯作者：
S. Kawabata;S. Kashiwaya;Y. Asano;Yukio Tanaka
中科院分区：
文献类型：
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作者：
S. Kawabata;S. Kashiwaya;Y. Asano;Yukio Tanaka
从理论上研究了电流偏置高温超导约瑟夫森结中的宏观量子隧穿MQT以及零能束缚态ZES对MQT的影响。我们得到的MQT率的解析公式，并表明，在正常/超导体界面的ZES的存在下，导致一个强大的欧姆准粒子耗散。因此，与完全不存在ZES的c轴连接相比，MQT速率明显受到抑制。
The macroscopic quantum tunneling MQT in the current biased high-Tc superconductor Josephson junctions and the effect of the zero-energy bound states ZES on the MQT are theoretically investigated. We obtained the analytical formula of the MQT rate and showed that the presence of the ZES at the normal/ superconductor interface leads to a strong ohmic quasiparticle dissipation. Therefore the MQT rate is noticeably inhibited compared with the c-axis junctions in which the ZES are completely absent.