Anomalous quantum criticality in the electron-doped cuprates.

ABSTRACT: In the physics of condensed matter, quantum critical phenomena and unconventional superconductivity are two major themes. In electron-doped cuprates, the low critical field (H_C2) allows one to study the putative quantum critical point (QCP) at low temperature and to understand its connection to the long-standing problem of the origin of the high-T_C superconductivity. Here we present measurements of the low-temperature normal-state thermopower (S) of the electron-doped cuprate superconductor La_2-x Ce _x CuO₄ (LCCO) from x = 0.11-0.19. We observe quantum critical [Formula: see text] versus [Formula: see text] behavior over an unexpectedly wide doping range x = 0.15-0.17 above the QCP (x = 0

SUBMITTER: Mandal PR 

PROVIDER: S-EPMC6442589 | biostudies-literature | 2019 Mar

REPOSITORIES: biostudies-literature