Dramatic change of optical properties at a quantum critical point in the heavy fermion system extbox>CeNi_1-xCo_xGe₂extbox>

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• 作者：Y.Y. Song ; K.E. Lee ; J.B. Hong ; H.J. Im ; S. Kimura ; Y.S. Kwon
• 关键词：e="mml15">e="text-decoration ; none ; color ; black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TJ9-4RDPYT2-9&_mathId=mml15&_user=1067359&_cdi=5305&_rdoc=38&_acct=C000050221&_version=1&_userid=10&md5=1ade51a58f472788dd163f27a49a00ee" t
• 刊名：Infrared Physics and Technology
• 出版年：2008
• 期刊代码：70_13504495
• 类别：et
• 出版时间：May 2008
• 卷：51
• 期：5
• 页码：485-487
• 文件大小：218 K

摘要

Optical properties of e="mml9">ef="/science?_ob=MathURL&_method=retrieve&_udi=B6TJ9-4RDPYT2-9&_mathId=mml9&_user=1067359&_cdi=5305&_rdoc=38&_acct=C000050221&_version=1&_userid=10&md5=2dc7a3d0cd9628831c623d4b11b49748">encedirect.com/cache/MiamiImageURL/B6TJ9-4RDPYT2-9-1R/0?wchp=dGLbVzz-zSkzS" alt="View the MathML source" title="View the MathML source" align="absbottom" border="0" height=17 width="194"/> have been studied via infrared spectroscopy. For e="mml10">e="text-decoration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TJ9-4RDPYT2-9&_mathId=mml10&_user=1067359&_cdi=5305&_rdoc=38&_acct=C000050221&_version=1&_userid=10&md5=24683385ad632cec54a6778d9880553c" title="Click to view the MathML source" alt="Click to view the MathML source">xe;0.3, a hump in the optical conductivity e="mml11">e="text-decoration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TJ9-4RDPYT2-9&_mathId=mml11&_user=1067359&_cdi=5305&_rdoc=38&_acct=C000050221&_version=1&_userid=10&md5=a0211eef706443f045579d8ab4b728e1" title="Click to view the MathML source" alt="Click to view the MathML source">σ₁ is observed at about 0.2 eV, resulting from strong hybridization between conduction electrons and Ce 4-f electronic states. For e="mml12">e="text-decoration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TJ9-4RDPYT2-9&_mathId=mml12&_user=1067359&_cdi=5305&_rdoc=38&_acct=C000050221&_version=1&_userid=10&md5=f08757f14d80a4a6e64c914e4559cd71" title="Click to view the MathML source" alt="Click to view the MathML source">xencedirect.com/scidirimg/entities/2a7d.gif" alt="less-than-or-equals, slant" title="less-than-or-equals, slant" border="0">0.3, in contrast, no such hump is observed. The low frequency plasmon indicating the existence of heavy particles is also observed below coherence temperature e="mml13">e="text-decoration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TJ9-4RDPYT2-9&_mathId=mml13&_user=1067359&_cdi=5305&_rdoc=38&_acct=C000050221&_version=1&_userid=10&md5=ac3fb792ec0862b7f86dff7cfbad51fc" title="Click to view the MathML source" alt="Click to view the MathML source">T^* for e="mml14">e="text-decoration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TJ9-4RDPYT2-9&_mathId=mml14&_user=1067359&_cdi=5305&_rdoc=38&_acct=C000050221&_version=1&_userid=10&md5=3a4b207f90373b5ac1ce8ce775cac9cc" title="Click to view the MathML source" alt="Click to view the MathML source">xe;0.3.