Critical viscosity of a fluctuating superconductor
Journal Article
·
· Physical Review. B
- Univ. of Maryland, College Park, MD (United States); DOE/OSTI
- Univ. of Maryland, College Park, MD (United States)
We consider a fluctuating superconductor in the vicinity of the transition temperature, Tc. The fluctuation shear viscosity is calculated. In two dimensions, the leading correction to viscosity is negative and scales as δη(T) ∝ ln(T–Tc). Critical hydrodynamics of the fluctuating superconductor involves two fluids: a fluid of fluctuating pairs and a quasiparticle fluid of single-electron excitations. The pair viscosity (Aslamazov-Larkin) term is shown to be zero. The (density of states) correction to viscosity of single-electron excitations is negative, which is due to fluctuating pairing that results in a reduction of electron density. Scattering of electrons off of the fluctuations gives rise to an enhanced quasiparticle scattering and another (Maki-Thomson) negative correction to viscosity. Furthermore, our results suggest that fluctuating superconductors provide a promising platform to investigate low-viscosity electronic media and may potentially host fermionic/electronic turbulence. Some experimental probes of two-fluid critical hydrodynamics are proposed such as time-of-flight measurement of turbulent energy cascades in critical cold atom superfluids and magnetic dynamos in three-dimensional fluctuating superconductors.
- Research Organization:
- Univ. of Maryland, College Park, MD (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- SC0001911
- OSTI ID:
- 1610589
- Alternate ID(s):
- OSTI ID: 1546842
- Journal Information:
- Physical Review. B, Journal Name: Physical Review. B Journal Issue: 6 Vol. 100; ISSN 2469-9950
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
| Residual bulk viscosity of a disordered 2D electron gas | text | January 2021 |
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