Comparative study of thermodynamic properties near the structural phase transitions in Sr3 Rh4 Sn13 and Sr3 Ir4 Sn13
學年 104
學期 2
出版（發表）日期 2016-06-15
作品名稱 Comparative study of thermodynamic properties near the structural phase transitions in Sr3 Rh4 Sn13 and Sr3 Ir4 Sn13
作品名稱（其他語言）
著者 C. S. Lue; C. N. Kuo; C. W. Tseng; K. K. Wu; Y.-H. Liang; C.-H. Du; and Y. K. Kuo
單位
出版者
著錄名稱、卷期、頁數 Physical Review B 93(24), p.245119 (6 pages)
摘要 Structural phase transitions in Sr3Rh4Sn13 and Sr3Ir4Sn13 are currently of interest due to the evidence of strong correlation with their superconductivity. To further obtain additional insight into the thermodynamic properties of the phase transitions, we have performed a study of single-crystalline Sr3Rh4Sn13 and Sr3Ir4Sn13 by means of the specific-heat and thermal-expansion measurements, mainly focusing on the features around the phase-transition temperature T∗≃138 and 147 K, respectively. In particular, the specific-heat data have been analyzed in the framework of the critical fluctuation model in addition to a mean-field contribution. Relatively large critical exponents were obtained for Sr3Ir4Sn13, suggesting a shorter coherence length associated with the phase transition. For each compound, an enhancement in the mean-field jump compared to the BCS value has been quantitatively identified, revealing the strong-coupling characteristics for the observed phase transitions. Furthermore, prominent changes in the coefficient of linear thermal expansion and bulk modulus across T∗ have been identified, providing new information about the structural phase transitions in the title compounds.
關鍵字
語言 en_US
ISSN 2469-9950
期刊性質 國外
收錄於 SCI
產學合作
通訊作者 C. S. Lue
審稿制度 否
國別 USA
公開徵稿
出版型式 ,紙本
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