Correlation between scale-invariant normal-state resistivity and superconductivity in an electron-doped cuprate
Abstract
An understanding of the normal state in the high-temperature superconducting cuprates is crucial to the ultimate understanding of the long-standing problem of the origin of the superconductivity itself. This so-called “strange metal” state is thought to be associated with a quantum critical point (QCP) hidden beneath the superconductivity. In electron-doped cuprates—in contrast to hole-doped cuprates—it is possible to access the normal state at very low temperatures and low magnetic fields to study this putative QCP and to probe the T → 0 K state of these materials. We report measurements of the low-temperature normal-state magnetoresistance (MR) of the n-type cuprate system La2–xCexCuO4 and find that it is characterized by a linear-in-field behavior, which follows a scaling relation with applied field and temperature, for doping (x) above the putative QCP (x = 0.14). The magnitude of the unconventional linear MR decreases as Tc decreases and goes to zero at the end of the superconducting dome (x ~ 0.175) above which a conventional quadratic MR is found. These results show that there is a strong correlation between the quantum critical excitations of the strange metal state and the high-Tc superconductivity.
- Authors:
-
[1];
[2];
[1]
- Univ. of Maryland, College Park, MD (United States)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Publication Date:
- Research Org.:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1532728
- Report Number(s):
- LA-UR-19-24360
Journal ID: ISSN 2375-2548
- Grant/Contract Number:
- 89233218CNA000001
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Science Advances
- Additional Journal Information:
- Journal Volume: 5; Journal Issue: 5; Journal ID: ISSN 2375-2548
- Publisher:
- AAAS
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; High Magnetic Field Science
Citation Formats
Sarkar, Tarapada, Mandal, P. R., Poniatowski, N. R., Chan, Mun Keat, and Greene, Richard L. Correlation between scale-invariant normal-state resistivity and superconductivity in an electron-doped cuprate. United States: N. p., 2019.
Web. doi:10.1126/sciadv.aav6753.
Sarkar, Tarapada, Mandal, P. R., Poniatowski, N. R., Chan, Mun Keat, & Greene, Richard L. Correlation between scale-invariant normal-state resistivity and superconductivity in an electron-doped cuprate. United States. doi:10.1126/sciadv.aav6753.
Sarkar, Tarapada, Mandal, P. R., Poniatowski, N. R., Chan, Mun Keat, and Greene, Richard L. Fri .
"Correlation between scale-invariant normal-state resistivity and superconductivity in an electron-doped cuprate". United States. doi:10.1126/sciadv.aav6753. https://www.osti.gov/servlets/purl/1532728.
@article{osti_1532728,
title = {Correlation between scale-invariant normal-state resistivity and superconductivity in an electron-doped cuprate},
author = {Sarkar, Tarapada and Mandal, P. R. and Poniatowski, N. R. and Chan, Mun Keat and Greene, Richard L.},
abstractNote = {An understanding of the normal state in the high-temperature superconducting cuprates is crucial to the ultimate understanding of the long-standing problem of the origin of the superconductivity itself. This so-called “strange metal” state is thought to be associated with a quantum critical point (QCP) hidden beneath the superconductivity. In electron-doped cuprates—in contrast to hole-doped cuprates—it is possible to access the normal state at very low temperatures and low magnetic fields to study this putative QCP and to probe the T → 0 K state of these materials. We report measurements of the low-temperature normal-state magnetoresistance (MR) of the n-type cuprate system La2–xCexCuO4 and find that it is characterized by a linear-in-field behavior, which follows a scaling relation with applied field and temperature, for doping (x) above the putative QCP (x = 0.14). The magnitude of the unconventional linear MR decreases as Tc decreases and goes to zero at the end of the superconducting dome (x ~ 0.175) above which a conventional quadratic MR is found. These results show that there is a strong correlation between the quantum critical excitations of the strange metal state and the high-Tc superconductivity.},
doi = {10.1126/sciadv.aav6753},
journal = {Science Advances},
number = 5,
volume = 5,
place = {United States},
year = {2019},
month = {5}
}
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Figures / Tables:
Fig. 1: MR versus doping. Magnetoresistivity for LCCO thin films with x = 0.15, 0.16, and 0.17. (A to C) ab-plane transverse resistivity versus magnetic field (H//c axis) as a function of temperature (color solid lines) for all x.
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