Optical spectroscopy study of charge density wave order in Sr3Rh4Sn13 and (Sr0.5Ca0.5)3Rh4Sn13

W. J. Ban; H. P. Wang; C. W. Tseng; C. N. Kuo; C. S. Lue; N. L. Wang

doi:10.1007/s11433-017-9007-0

Optical spectroscopy study of charge density wave order in Sr₃Rh₄Sn₁₃ and (Sr_0.5Ca_0.5)₃Rh₄Sn₁₃

W. J. Ban
, H. P. Wang
, C. W. Tseng
, C. N. Kuo
, C. S. Lue
, N. L. Wang

物理學系

研究成果: Article › 同行評審

11 引文斯高帕斯（Scopus）

摘要

We perform optical spectroscopy measurement on single-crystal samples of Sr₃Rh₄Sn₁₃ and (Sr_0.5Ca_0.5)₃Rh₄Sn₁₃. Formation of CDW energy gap was clearly observed for both single-crystal samples when they undergo the phase transitions. The existence of residual Drude components in σ₁(ω) below T_CDW indicates that the Fermi surface is only partially gapped in the CDW state. The obtained value of 2Δ/k_BT_CDW is roughly 13 for both Sr₃Rh₄Sn₁₃ and (Sr_0.5Ca_0.5)₃Rh₄Sn₁₃ compounds, which is considerably larger than the mean-field value based on the weak-coupling BCS theory. The measurements provide optical evidence for the strong coupling characteristics of the CDW phase transition.

原文	English
文章編號	047011
期刊	Science China: Physics, Mechanics and Astronomy
卷	60
發行號	4
DOIs	https://doi.org/10.1007/s11433-017-9007-0
出版狀態	Published - 2017 4月 1

All Science Journal Classification (ASJC) codes

一般物理與天文學

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10.1007/s11433-017-9007-0

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title = "Optical spectroscopy study of charge density wave order in Sr3Rh4Sn13 and (Sr0.5Ca0.5)3Rh4Sn13 ",

abstract = "We perform optical spectroscopy measurement on single-crystal samples of Sr3Rh4Sn13 and (Sr0.5Ca0.5)3Rh4Sn13. Formation of CDW energy gap was clearly observed for both single-crystal samples when they undergo the phase transitions. The existence of residual Drude components in σ1(ω) below TCDW indicates that the Fermi surface is only partially gapped in the CDW state. The obtained value of 2Δ/kBTCDW is roughly 13 for both Sr3Rh4Sn13 and (Sr0.5Ca0.5)3Rh4Sn13 compounds, which is considerably larger than the mean-field value based on the weak-coupling BCS theory. The measurements provide optical evidence for the strong coupling characteristics of the CDW phase transition.",

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note = "Publisher Copyright: {\textcopyright} 2017, Science China Press and Springer-Verlag Berlin Heidelberg.",

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T1 - Optical spectroscopy study of charge density wave order in Sr3Rh4Sn13 and (Sr0.5Ca0.5)3Rh4Sn13

AU - Ban, W. J.

AU - Wang, H. P.

AU - Tseng, C. W.

AU - Kuo, C. N.

AU - Lue, C. S.

AU - Wang, N. L.

PY - 2017/4/1

Y1 - 2017/4/1

N2 - We perform optical spectroscopy measurement on single-crystal samples of Sr3Rh4Sn13 and (Sr0.5Ca0.5)3Rh4Sn13. Formation of CDW energy gap was clearly observed for both single-crystal samples when they undergo the phase transitions. The existence of residual Drude components in σ1(ω) below TCDW indicates that the Fermi surface is only partially gapped in the CDW state. The obtained value of 2Δ/kBTCDW is roughly 13 for both Sr3Rh4Sn13 and (Sr0.5Ca0.5)3Rh4Sn13 compounds, which is considerably larger than the mean-field value based on the weak-coupling BCS theory. The measurements provide optical evidence for the strong coupling characteristics of the CDW phase transition.

AB - We perform optical spectroscopy measurement on single-crystal samples of Sr3Rh4Sn13 and (Sr0.5Ca0.5)3Rh4Sn13. Formation of CDW energy gap was clearly observed for both single-crystal samples when they undergo the phase transitions. The existence of residual Drude components in σ1(ω) below TCDW indicates that the Fermi surface is only partially gapped in the CDW state. The obtained value of 2Δ/kBTCDW is roughly 13 for both Sr3Rh4Sn13 and (Sr0.5Ca0.5)3Rh4Sn13 compounds, which is considerably larger than the mean-field value based on the weak-coupling BCS theory. The measurements provide optical evidence for the strong coupling characteristics of the CDW phase transition.

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U2 - 10.1007/s11433-017-9007-0

DO - 10.1007/s11433-017-9007-0

M3 - Article

AN - SCOPUS:85013343477

SN - 1674-7348

VL - 60

JO - Science China: Physics, Mechanics and Astronomy

JF - Science China: Physics, Mechanics and Astronomy

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Optical spectroscopy study of charge density wave order in Sr3Rh4Sn13 and (Sr0.5Ca0.5)3Rh4Sn13

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Optical spectroscopy study of charge density wave order in Sr₃Rh₄Sn₁₃ and (Sr_0.5Ca_0.5)₃Rh₄Sn₁₃