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

Wu, Jie; Bollinger, Anthony T.; Sun, Yujie; Božović, Ivan

doi:10.1007/s10948-016-3668-y

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

Journal Article · Mon Aug 15 00:00:00 EDT 2016 · Journal of Superconductivity and Novel Magnetism

DOI:https://doi.org/10.1007/s10948-016-3668-y· OSTI ID:1324274

Wu, Jie ^[1]; Bollinger, Anthony T. ^[1]; Sun, Yujie ^[2]; Božović, Ivan ^[3]

Brookhaven National Lab. (BNL), Upton, NY (United States)
Brookhaven National Lab. (BNL), Upton, NY (United States); Chinese Academy of Sciences, Beijing (China)
Brookhaven National Lab. (BNL), Upton, NY (United States); Yale Univ., New Haven, CT (United States)

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_xCuO₄ (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.

View Accepted Manuscript (DOE)

Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

OSTI ID:: 1324274

Report Number(s):: BNL--112538-2016-JA; KC0203020

Journal Information:: Journal of Superconductivity and Novel Magnetism, Journal Name: Journal of Superconductivity and Novel Magnetism; ISSN 1557-1939

Publisher:: SpringerCopyright Statement

Country of Publication:: United States

Language:: English

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