Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2011-07-25
Physics
Condensed Matter
Strongly Correlated Electrons
4+ pages, 3 figures
Scientific paper
Electronic nematicity proposed to exist in a number of transition metal materials can have different microscopic origins. In particular, the anisotropic resistivity and meta-magnetic jumps observed in Sr3Ru2O7 are consistent with an earlier proposal that the isotropic-nematic transition is generically first order and accompanied by meta-magnetism when tuned by a magnetic field. However, additional striking experimental features such as a non-Fermi liquid resistivity and critical thermodynamic behavior imply the presence of an unidentified quantum critical point (QCP). Here we show that orbital degrees of freedom play an essential role in revealing a nematic QCP, even though it is overshadowed by a nearby meta-nematic transition at low temperature. We further present a finite temperature phase diagram including the entropy landscape and discuss our findings in light of the phenomena observed in Sr3Ru2O7.
Kee Hae-Young
Puetter Christoph M.
Swiecicki Sylvia D.
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