...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Physical review >Detailed optical spectroscopy of hybridization gap and hidden-order transition in high-quality URu_2Si_2 single crystals
【24h】

Detailed optical spectroscopy of hybridization gap and hidden-order transition in high-quality URu_2Si_2 single crystals

机译：高质量URu_2Si_2单晶杂化间隙和隐序跃迁的详细光谱学。

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

We present a detailed temperature and frequency dependence of the optical conductivity measured on clean high-quality single crystals of URu_2Si_2 of ac- and ab-plane surfaces. Our data demonstrate the itinerant character of the narrow 5f bands, becoming progressively coherent as the temperature is lowered below a crossover temperature T* ～ 75 K. T* is higher than in previous reports as a result of a different sample preparation, which minimizes residual strain. We furthermore present the density-response (energy-loss) function of this compound, and determine the energies of the heavy-fermion plasmons with a- and c-axis polarization. Our observation of a suppression of optical conductivity below 50 meV along both the a and c axes, along with a heavy-fermion plasmon at 18 meV, points toward the emergence of a band of coherent charge carriers crossing the Fermi energy and the emergence of a hybridization gap on part of the Fermi surface. The evolution towards coherent itinerant states is accelerated below the hidden order temperature T_HO = 17.5 K. In the hidden order phase the low-frequency optical conductivity shows a single gap at ～6.5 meV, which closes at T_(HO).
机译：我们提出了在交流平面和ab平面表面的URu_2Si_2清洁高质量单晶上测得的光导率的详细温度和频率依赖性。我们的数据证明了窄的5f波段的流动特性，当温度降低到低于交叉温度T *〜75 K时，其逐渐变得连贯。由于样品制备方式的不同，T *高于以前的报告，从而最大程度地减少了残留应变。我们进一步介绍了该化合物的密度响应（能量损失）功能，并确定了具有a轴和c轴极化的重费米子等离子体激元的能量。我们观察到沿a轴和c轴都将光导率抑制在50 meV以下，以及在18 meV处存在重费米子等离子体，这表明一条穿过费米能量的相干电荷载流子的出现和a的出现。费米表面一部分上的杂交缺口。在隐藏级温度T_HO = 17.5 K以下，向相干迭代态的演化加速。在隐藏级相位中，低频光导率在〜6.5 meV处显示单个间隙，该间隙在T_（HO）处闭合。

著录项

  • 来源
    《Physical review》 |2016年第23期|235101.1-235101.12|共12页
  • 作者

    N. Bachar; D. Stricker; S. Muleady; K. Wang; J. A. Mydosh; Y. K. Huang; D. van der Marel;

  • 作者单位

    Department of Quantum Matter Physics, University of Geneva, CH-1211 Geneva 4, Switzerland;

    Department of Quantum Matter Physics, University of Geneva, CH-1211 Geneva 4, Switzerland;

    Department of Quantum Matter Physics, University of Geneva, CH-1211 Geneva 4, Switzerland;

    Department of Quantum Matter Physics, University of Geneva, CH-1211 Geneva 4, Switzerland;

    Kamerlingh Onnes Laboratory, Leiden University, 2300RA Leiden, The Netherlands;

    Van der Waals-Zeeman Institute, University of Amsterdam, 1018XE Amsterdam, The Netherlands;

    Department of Quantum Matter Physics, University of Geneva, CH-1211 Geneva 4, Switzerland;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号