Thermoelectric power investigations of YbAgGe across the quantum critical point
| Title | Thermoelectric power investigations of YbAgGe across the quantum critical point |
| Publication Type | Journal Article |
| Year of Publication | 2010 |
| Authors | Mun E, Bud'ko SL, Canfield PC |
| Journal Title | Physical Review B |
| Volume | 82 |
| Pages | 174403 |
| Date Published | 11/02 |
| ISBN Number | 1098-0121 |
| Accession Number | ISI:000283708600003 |
| Keywords | COMPOUND YBAGGE, field, heavy-fermion compounds, INELASTIC NEUTRON-SCATTERING, LIQUID BEHAVIOR, metals, phase-transition, thermopower, ybrh2si2, zero-temperature limit |
| Abstract | The magnetic field and temperature dependences of the thermoelectric power (TEP) of the antiferromagnetically ordered heavy fermion compound YbAgGe are measured across the field-induced quantum critical point. These TEP measurements reproduce the earlier H-T phase diagram and identify an additional domelike phase between similar to 45 and similar to 70 kOe. On the low-field side of this region, H > H-c similar to 45 kOe, the sign of the TEP changes from negative to positive; on the high-field side of this region, H approximate to 70 kOe, a non-Fermi-liquid state is evidenced as the logarithmic temperature dependence of S(T)/T, in agreement with previous specific heat results C(T)/T alpha-log(T). For higher fields, H > 70 kOe, the observed large value of alpha, S(T) = alpha T, is indicative of the heavy fermion state and shows a correlation with C(T)/T. |
| URL | <Go to ISI>://000283708600003http://prb.aps.org/pdf/PRB/v82/i17/e174403 |
| DOI | 10.1103/Physrevb.82.174403 |
| Alternate Journal | Phys Rev B |
