Evidence of quantum criticality in the phase diagram of K$_x$Sr$_{1-x}$Fe$_2$As$_2$ from measurements of transport and thermoelectricity
| dc.creator | Gooch, Melissa | |
| dc.creator | Lv, Bing | |
| dc.creator | Lorenz, Bernd | |
| dc.creator | Guloy, Arnold M. | |
| dc.creator | Chu, Ching-Wu | |
| dc.date | 2008-12-10 | |
| dc.date | 2009-03-05 | |
| dc.date.accessioned | 2026-07-07T12:48:54Z | |
| dc.date.available | 2026-07-07T12:48:54Z | |
| dc.description | The electrical transport and thermoelectric properties of K_xSr_{1-x}Fe_2As_2 are investigated for 0<x<1. The resistivity rho(T) shows a crossover from Fermi liquid-like temperature dependence at small x to linear rho~T dependence at x_c=0.4. With further increasing x, rho(T) becomes non-linear again. The thermoelectric power S(T) exhibits a similar crossover with increasing x with a logarithmic T-dependence, S/T~ln(T), near the critical doping x_c. These results provide evidence for a quantum critical behavior due to the coupling of low-energy conduction electrons to two-dimensional spin fluctuations. | |
| dc.description | 5 pages, 4 figures | |
| dc.identifier | https://arxiv.org/abs/0812.1927 | |
| dc.identifier | http://arxiv.org/abs/0812.1927 | |
| dc.identifier | Phys. Rev. B 79, 104504 (2009) | |
| dc.identifier | doi:10.1103/PhysRevB.79.104504 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/222218 | |
| dc.subject | Superconductivity | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | Evidence of quantum criticality in the phase diagram of K$_x$Sr$_{1-x}$Fe$_2$As$_2$ from measurements of transport and thermoelectricity | |
| dc.type | text |