Abstract
We report a study of a single-crystal La3Co4Sn 13 by means of the specific heat and 59Co nuclear magnetic resonance (NMR) spectroscopy. A first-order phase transition with a marked peak at T * 152 K has been discerned by the specific heat measurement. The observed transition has been connected to a structural change from a simple cubic to a body-centered-cubic superstructure with crystallographic cell doubling, accompanied by the Fermi surface reconstruction. Indeed, NMR observations clearly indicate a significant change in the local electronic characteristics across this phase transition. The spin-lattice-relaxation rate measurement further provides an estimate of Co 3d Fermi-level density of states Nd(EF), revealing a visible reduction in N d(EF) in the low-temperature phase. This finding essentially associated with the partially gapped Fermi surfaces would be appropriate for the isostructural analog of Sr3Ir4 Sn 13, which has been claimed to possess charge-density-wave (CDW) behavior with a three-dimensional crystallographic structure.
Original language | English |
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Article number | 115113 |
Journal | Physical Review B - Condensed Matter and Materials Physics |
Volume | 88 |
Issue number | 11 |
DOIs | |
Publication status | Published - 2013 Sept 9 |
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics