PIRSA:17060037

Low temperature specific heat characterization of the geometrically frustrated magnetic compound Yb2Ti2O7

Pomaranski, D. (2017). Low temperature specific heat characterization of the geometrically frustrated magnetic compound Yb2Ti2O7. Perimeter Institute. https://pirsa.org/17060037

Pomaranski, David. Low temperature specific heat characterization of the geometrically frustrated magnetic compound Yb2Ti2O7. Perimeter Institute, Jun. 07, 2017, https://pirsa.org/17060037 

          @misc{ pirsa_PIRSA:17060037,
            doi = {10.48660/17060037},
            url = {https://pirsa.org/17060037},
            author = {Pomaranski, David},
            keywords = {Condensed Matter},
            language = {en},
            title = {Low temperature specific heat characterization of the geometrically frustrated magnetic compound Yb2Ti2O7},
            publisher = {Perimeter Institute},
            year = {2017},
            month = {jun},
            note = {PIRSA:17060037 see, \url{https://pirsa.org}}
          }

David Pomaranski University of Waterloo

DOI 10.48660/17060037
Collection
Talk Type Conference
Subject

Abstract

Yb2Ti2O7 is a geometrically frustrated magnet that proposed as a quantum spin liquid (QSL) candidate. This would have an emergent U(1) gauge structure, support emergent quasiparticles and a continuum of gapless spin excitations. A cubic power law dependence is expected in the specific heat down to zero temperature. [1,2] Identifying a power law is hindered by the presence of a sharp transition at 0.26K and a Schottky anomaly due to nuclear hyperfine interactions below 0.1K. [3] By preparing an isotopically enriched sample with 174-Yb and 48-Ti, we suppress the Schottky anomaly. This allows us to extend the specific heat to lower temperatures, revealing a polynomial behavior to at least 0.05 K that is suggestive of a quantum spin liquid.