Sharp Signature of a dx2−y2 Quantum Critical Point in the Hall Coefficient of Cuprate Superconductors
Year: 2002
Type: article
Abstract: We study the behavior of the Hall coefficient, ${R}_{H}$, in a system exhibiting ${d}_{{x}^{2}\ensuremath{-}{y}^{2}}$ density-wave order in a regime in which the carrier concentration, $x$, is tuned to approach a quantum critical point at which the order is destroyed. At the mean-field level, we find that ${n}_{\mathrm{H}\mathrm{a}\mathrm{l}\mathrm{l}}=1/{R}_{H}$ evinces a sharp signature of the transition. There is a kink in ${n}_{\mathrm{H}\mathrm{a}\mathrm{l}\mathrm{l}}$ at the critical value of the carrier concentration, ${x}_{c}$; as the critical point is approached from the ordered side, the slope of ${n}_{\mathrm{H}\mathrm{a}\mathrm{l}\mathrm{l}}$ diverges. Hall transport experiments in the cuprates, at high magnetic fields sufficient to destroy superconductivity, should reveal this effect.
Source: Physical Review Letters
Institution: University of California, Los Angeles
Language: Latvian
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W1965729651