Multiple regions of quantum criticality in YbAgGe
| Title | Multiple regions of quantum criticality in YbAgGe |
| Publication Type | Journal Article |
| Year of Publication | 2011 |
| Authors | Schmiedeshoff GM, Mun ED, Lounsbury AW, Tracy SJ, Palm EC, Hannahs ST, Park JH, Murphy TP, Bud'ko SL, Canfield PC |
| Journal Title | Physical Review B |
| Volume | 83 |
| Pages | 180408 |
| Date Published | 05 |
| ISBN Number | 1098-0121 |
| Accession Number | WOS:000293333600004 |
| Abstract | Dilation and thermopower measurements on YbAgGe, a heavy-fermion antiferromagnet, clarify and refine the magnetic-field temperature (H-T) phase diagram and reveal a field-induced phase with T-linear resistivity. On the low-H side of this phase we find evidence for a first-order transition and suggest that YbAgGe at 4.5 T may be close to a quantum critical end point. On the high-H side our results are consistent with a second-order transition suppressed to a quantum critical point near 7.2 T. We discuss these results in light of global phase diagrams proposed for Kondo lattice systems. |
| DOI | 10.1103/PhysRevB.83.180408 |
