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Title: Ground state of underdoped cuprates in vicinity of superconductor-to-insulator transition

Abstract

When an insulating underdoped cuprate is doped beyond a critical concentration (x c), high-temperature superconductivity emerges. We have synthesized a series of La 2–xSr xCuO 4 (LSCO) samples using the combinatorial spread technique that allows us to traverse the superconductor-to-insulator transition (SIT) in extremely fine doping steps, Δx≈0.00008. We have measured the Hall resistivity (ρ H) as a function of temperature down to 300 mK in magnetic fields up to 9 T. At very low temperatures, ρ H shows an erratic behavior, jumps and fluctuations exceeding 100%, hysteresis, and memory effects, indicating that the insulating ground state is a charge-cluster glass (CCG). Furthermore, based on the phase diagram depicted in our experiment, we propose a unified picture to account for the anomalous electric transport in the vicinity of the SIT, suggesting that the CCG is in fact a disordered and glassy version of the charge density wave.

Authors:
 [1];  [1];  [2];  [3]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States); Chinese Academy of Sciences, Beijing (China)
  3. Brookhaven National Lab. (BNL), Upton, NY (United States); Yale Univ., New Haven, CT (United States)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1324274
Report Number(s):
BNL-112538-2016-JA
Journal ID: ISSN 1557-1939; R&D Project: MA509MACA; KC0203020
Grant/Contract Number:  
SC00112704
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Superconductivity and Novel Magnetism
Additional Journal Information:
Journal Name: Journal of Superconductivity and Novel Magnetism; Journal ID: ISSN 1557-1939
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; high-temperature superconductors; charge glass; superconductor-to-insulator; transition; Quantum fluctuations; Hall effect

Citation Formats

Wu, Jie, Bollinger, Anthony T., Sun, Yujie, and Božović, Ivan. Ground state of underdoped cuprates in vicinity of superconductor-to-insulator transition. United States: N. p., 2016. Web. doi:10.1007/s10948-016-3668-y.
Wu, Jie, Bollinger, Anthony T., Sun, Yujie, & Božović, Ivan. Ground state of underdoped cuprates in vicinity of superconductor-to-insulator transition. United States. doi:10.1007/s10948-016-3668-y.
Wu, Jie, Bollinger, Anthony T., Sun, Yujie, and Božović, Ivan. Mon . "Ground state of underdoped cuprates in vicinity of superconductor-to-insulator transition". United States. doi:10.1007/s10948-016-3668-y. https://www.osti.gov/servlets/purl/1324274.
@article{osti_1324274,
title = {Ground state of underdoped cuprates in vicinity of superconductor-to-insulator transition},
author = {Wu, Jie and Bollinger, Anthony T. and Sun, Yujie and Božović, Ivan},
abstractNote = {When an insulating underdoped cuprate is doped beyond a critical concentration (xc), high-temperature superconductivity emerges. We have synthesized a series of La2–xSrxCuO4 (LSCO) samples using the combinatorial spread technique that allows us to traverse the superconductor-to-insulator transition (SIT) in extremely fine doping steps, Δx≈0.00008. We have measured the Hall resistivity (ρH) as a function of temperature down to 300 mK in magnetic fields up to 9 T. At very low temperatures, ρH shows an erratic behavior, jumps and fluctuations exceeding 100%, hysteresis, and memory effects, indicating that the insulating ground state is a charge-cluster glass (CCG). Furthermore, based on the phase diagram depicted in our experiment, we propose a unified picture to account for the anomalous electric transport in the vicinity of the SIT, suggesting that the CCG is in fact a disordered and glassy version of the charge density wave.},
doi = {10.1007/s10948-016-3668-y},
journal = {Journal of Superconductivity and Novel Magnetism},
number = ,
volume = ,
place = {United States},
year = {2016},
month = {8}
}

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