Hall number inYbRh2Si2

2005/02/24 by M. R. Norman · 3 citations
Materials Science · Physics and Astronomy · #Iron-based superconductors research #Magnetic Properties of Alloys #Rare-earth and actinide compounds #cond-mat.str-el

paper · pdf · doi:10.1103/physrevb.71.220405

published as Physical Review B 71, 220405 (R) (2005) · 4 pages, 5 figures

arxiv created 2005/02/24 · openalex publication_date 2005/06/13 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

Recent experimental studies have revealed an abrupt change in the Hall number at a field tuned quantum critical point in the heavy fermion magnet YbRh₂Si₂. We investigate this by calculating the local density band structure for this metal and the appropriate transport integrals. We find the Fermi surface to be multisheeted with the two largest sheets having opposite sign contributions to the Hall number. Small changes in the f electron occupation are sufficient to reproduce the observed large change in the Hall number. This suggests that YbRh₂Si₂ may be an example of a quantum critical valence fluctuator.

Citations

• Explicit local exchange-correlation potentials

Cited by

• From Incommensurate Correlations to Mesoscopic Spin Resonance inYbRh2Si2
• Hall effect measurements and electronic structure calculations onYbRh2Si2and its reference compoundsLuRh2Si2andYbIr2Si2
• Fermi-liquid instabilities at magnetic quantum phase transitions