Scanning SQUID characterization of extremely overdoped La2-xSrxCuO4
Abstract
Recently, advances in film synthesis methods have enabled a study of extremely overdoped . This has revealed a surprising behavior of the superfluid density as a function of doping and temperature, the explanation of which is vividly debated. One popular class of models posits electronic phase separation, where the superconducting phase fraction decreases with doping, while some competing phase (e.g., ferromagnetic) progressively takes over. A problem with this scenario is that all the way up to the dome edge the superconducting transition remains sharp, according to mutual inductance measurements. However, the physically relevant scale is the Pearl penetration depth , and this technique probes the sample on a length scale that is much larger than . In the present paper, we use local scanning superconducting quantum interference device (SQUID) measurements that probe the susceptibility of the sample on the scale . Our SQUID maps show uniform landscapes of susceptibility and excellent overall agreement of the local penetration depth data with the bulk measurements. Overall, these results contribute an important piece to the puzzle of how high-temperature superconductivity vanishes on the overdoped side of the cuprate phase diagram.
- Authors:
-
- Univ. of Connecticut, Storrs, CT (United States); Lux Research, Boston, MA (United States)
- Univ. of Connecticut, Storrs, CT (United States)
- Brookhaven National Lab. (BNL), Upton, NY (United States); Yale Univ., New Haven, CT (United States)
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Univ. of Connecticut, Storrs, CT (United States); Univ. of Connecticut, Storrs, CT (United States). Inst. of Material Science
- Publication Date:
- Research Org.:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); Gordon and Betty Moore Foundation
- OSTI Identifier:
- 1762753
- Report Number(s):
- BNL-220893-2021-JAAM
Journal ID: ISSN 2469-9950; TRN: US2205904
- Grant/Contract Number:
- SC0012704; GBMF9074
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review B
- Additional Journal Information:
- Journal Volume: 103; Journal Issue: 2; Journal ID: ISSN 2469-9950
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Methods in superconductivity; pairing mechanisms; penetration depth; cuprates; SQUID
Citation Formats
Herrera, Chloe, Franklin, Jacob, Božović, Ivan, He, Xi, and Sochnikov, Ilya. Scanning SQUID characterization of extremely overdoped La2-xSrxCuO4. United States: N. p., 2021.
Web. doi:10.1103/physrevb.103.024528.
Herrera, Chloe, Franklin, Jacob, Božović, Ivan, He, Xi, & Sochnikov, Ilya. Scanning SQUID characterization of extremely overdoped La2-xSrxCuO4. United States. https://doi.org/10.1103/physrevb.103.024528
Herrera, Chloe, Franklin, Jacob, Božović, Ivan, He, Xi, and Sochnikov, Ilya. Wed .
"Scanning SQUID characterization of extremely overdoped La2-xSrxCuO4". United States. https://doi.org/10.1103/physrevb.103.024528. https://www.osti.gov/servlets/purl/1762753.
@article{osti_1762753,
title = {Scanning SQUID characterization of extremely overdoped La2-xSrxCuO4},
author = {Herrera, Chloe and Franklin, Jacob and Božović, Ivan and He, Xi and Sochnikov, Ilya},
abstractNote = {Recently, advances in film synthesis methods have enabled a study of extremely overdoped La2-xSrxCuO4. This has revealed a surprising behavior of the superfluid density as a function of doping and temperature, the explanation of which is vividly debated. One popular class of models posits electronic phase separation, where the superconducting phase fraction decreases with doping, while some competing phase (e.g., ferromagnetic) progressively takes over. A problem with this scenario is that all the way up to the dome edge the superconducting transition remains sharp, according to mutual inductance measurements. However, the physically relevant scale is the Pearl penetration depth ΛP, and this technique probes the sample on a length scale L that is much larger than ΛP. In the present paper, we use local scanning superconducting quantum interference device (SQUID) measurements that probe the susceptibility of the sample on the scale L<<ΛP. Our SQUID maps show uniform landscapes of susceptibility and excellent overall agreement of the local penetration depth data with the bulk measurements. Overall, these results contribute an important piece to the puzzle of how high-temperature superconductivity vanishes on the overdoped side of the cuprate phase diagram.},
doi = {10.1103/physrevb.103.024528},
journal = {Physical Review B},
number = 2,
volume = 103,
place = {United States},
year = {Wed Jan 27 00:00:00 EST 2021},
month = {Wed Jan 27 00:00:00 EST 2021}
}
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