Signatures of odd-frequency pairing in the Josephson junction current noise
Seoane Souto, Rubén LU
; Kuzmanovski, Dushko
and Balatsky, Alexander V.
(2020)
In Physical Review Research
2(4).
- Abstract
- Odd-frequency (odd−ω) electron pair correlations naturally appear at the interface between BCS superconductors and other materials. The detection of odd−ω pairs, which are necessarily nonlocal in time, is still an open problem. The main reason is that they do not contribute to static measurements described by time-local correlation functions. Therefore, dynamical measurements, which depend on nonlocal time correlations, are suitable for detecting these pairs. In this work, we study the signatures of odd−ω pairs in the supercurrent noise through a weak link between two superconductors at different superconducting phases. We show that the finite-frequency current noise can be decomposed into three different contributions... (More)
- Odd-frequency (odd−ω) electron pair correlations naturally appear at the interface between BCS superconductors and other materials. The detection of odd−ω pairs, which are necessarily nonlocal in time, is still an open problem. The main reason is that they do not contribute to static measurements described by time-local correlation functions. Therefore, dynamical measurements, which depend on nonlocal time correlations, are suitable for detecting these pairs. In this work, we study the signatures of odd−ω pairs in the supercurrent noise through a weak link between two superconductors at different superconducting phases. We show that the finite-frequency current noise can be decomposed into three different contributions coming from even-frequency (even−ω),odd−ω pair amplitudes, and electron-hole correlation functions. Odd−ω pairing, which is interlead (between electrons at different sides of the junction), provides a positive contribution to the noise, becoming maximal at a superconducting phase difference of π. In contrast, intralead even−ω pair amplitude tends to reduce the noise, except for a region close to π controlled by the transmission of the junction. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/01c80950-94f9-4106-930c-becbd95199dd
- author
- Seoane Souto, Rubén
LU
; Kuzmanovski, Dushko
and Balatsky, Alexander V.
- organization
- publishing date
- 2020
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review Research
- volume
- 2
- issue
- 4
- article number
- 043193
- pages
- 11 pages
- publisher
- American Physical Society
- external identifiers
-
- scopus:85101408980
- ISSN
- 2643-1564
- DOI
- 10.1103/PhysRevResearch.2.043193
- language
- English
- LU publication?
- yes
- id
- 01c80950-94f9-4106-930c-becbd95199dd
- date added to LUP
- 2021-01-15 16:24:04
- date last changed
- 2025-04-04 14:45:01
@article{01c80950-94f9-4106-930c-becbd95199dd,
abstract = {{Odd-frequency (odd−<i>ω</i>) electron pair correlations naturally appear at the interface between BCS superconductors and other materials. The detection of odd−<i>ω</i> pairs, which are necessarily nonlocal in time, is still an open problem. The main reason is that they do not contribute to static measurements described by time-local correlation functions. Therefore, dynamical measurements, which depend on nonlocal time correlations, are suitable for detecting these pairs. In this work, we study the signatures of odd−<i>ω</i> pairs in the supercurrent noise through a weak link between two superconductors at different superconducting phases. We show that the finite-frequency current noise can be decomposed into three different contributions coming from even-frequency (even−<i>ω</i>),odd−<i>ω</i> pair amplitudes, and electron-hole correlation functions. Odd−<i>ω</i> pairing, which is interlead (between electrons at different sides of the junction), provides a positive contribution to the noise, becoming maximal at a superconducting phase difference of <i>π</i>. In contrast, intralead even−<i>ω</i> pair amplitude tends to reduce the noise, except for a region close to <i>π</i> controlled by the transmission of the junction.}},
author = {{Seoane Souto, Rubén and Kuzmanovski, Dushko and Balatsky, Alexander V.}},
issn = {{2643-1564}},
language = {{eng}},
number = {{4}},
publisher = {{American Physical Society}},
series = {{Physical Review Research}},
title = {{Signatures of odd-frequency pairing in the Josephson junction current noise}},
url = {{http://dx.doi.org/10.1103/PhysRevResearch.2.043193}},
doi = {{10.1103/PhysRevResearch.2.043193}},
volume = {{2}},
year = {{2020}},
}