Singular current response from isolated impurities in d-wave superconductors.
نویسندگان
چکیده
The current response of a d-wave superconductor containing a single impurity is calculated and shown to be singular in the low-temperature limit, leading in the case of strong scattering to a 1/T term in the penetration depth lambda(T) similar to that induced by Andreev surface bound states. For a small number of such impurities, we argue this low-T upturn could be observable in cuprate superconductors.
منابع مشابه
اتصال جوزفسون بین ابررساناهای دمای بالا با ضریب عبور اختیاری
In this paper, a dc Josephson junction between two singlet superconductors (d-wave and s-wave) with arbitrary reflection coefficient has been investigated theoretically. For the case of high Tc superconductors, the c-axes are parallel to an interface with finite transparency and their ab-planes have a mis-orientation. The physics of potential barrier will be demonstrated by a transparency coeff...
متن کاملMagnetic field dependence of the penetration depth of d-wave superconductors with strong isolated impurities
A d-wave superconductor with isolated strong non-magnetic impurities should exhibit an upturn in the penetration depth at low temperatures [1]. Here we calculate how an external magnetic field supresses this effect.
متن کاملScattering by impurity-induced order parameter “holes” in d-wave superconductors
Nonmagnetic impurities in d-wave superconductors cause strong local suppressions of the order parameter. We investigate the observable effects of the scatterigng off such suppressions in bulk samples by treating the order parameter “hole” as a pointlike off-diagonal scatterer treated within a selfconsistent t-matrix approximation. Strong scattering potentials lead to a finite-energy spectral fe...
متن کاملImpurity bound states in fully gapped d-wave superconductors with subdominant order parameters
Impurities in superconductors and their induced bound states are important both for engineering novel states such as Majorana zero-energy modes and for probing bulk properties of the superconducting state. The high-temperature cuprates offer a clear advantage in a much larger superconducting order parameter, but the nodal energy spectrum of a pure d-wave superconductor only allows virtual bound...
متن کامل0 Quasi - Particle Bound States around Impurities in d x 2 − y 2 - wave
Zn and Ni impurities in the hole-doped high-temperature superconductors are known to have strong effects on thermodynamic and transport properties. A recent scanning tunneling microscope study of Zn-doped Bi2212 (Pan et al., Nature 403, 746 (2000)) has provided high-resolution images of the local density of states around non-magnetic impurities in dx2−y2-wave superconductors. These pictures con...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Physical review letters
دوره 89 14 شماره
صفحات -
تاریخ انتشار 2002