Evolution of the electronic structure of H0B4 with temperature

Deepnarayan Biswas; Nishaina Sahadev; Ganesh Adhikary; Geetha Balakrishnan; Kalobaran Maiti

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Evolution of the electronic structure of H0B4 with temperature

机译：H0B4电子结构随温度的演变

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We studied the electronic structure of a Shastry-Sutherland lattice system, H0B4 employing high-resolution photoemission spectroscopy and ab initio band-structure calculations. The surface and bulk borons exhibit subtle differences and loss of boron compared to the stoichiometric bulk. However, the surface and bulk conduction bands near Fermi level are found to be similar. Evolution of the electronic structure with temperature is found to be similar to that observed in a typical charge-disordered system. A sharp dip is observed at the Fermi level in the low-temperature spectra revealing a signature of antiferromagnetic gap. Asymmetric spectral weight transfer with temperature manifests particle-hole asymmetry that may be related to the exotic properties of these systems.

机译：我们研究了Shastry-Sutherland晶格系统H0B4的电子结构，并利用高分辨率光发射光谱和从头算带结构进行了计算。与化学计量的体积相比，表面硼和体积硼表现出细微的差异和硼的损失。然而，发现费米能级附近的表面和体导带相似。发现电子结构随温度的演化与在典型的无序电荷系统中观察到的相似。在低温光谱的费米能级处观察到急剧下降，显示出反铁磁间隙的特征。随温度的光谱重量传递不对称表现出颗粒-孔的不对称性，这可能与这些系统的外来特性有关。

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来源
《Physical review》 |2013年第13期|134405.1-134405.5|共5页
作者
Deepnarayan Biswas; Nishaina Sahadev; Ganesh Adhikary; Geetha Balakrishnan; Kalobaran Maiti;
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作者单位

Department of Condensed Matter Physics and Materials' Science, Tata Institute of Fundamental Research, Colaba, Mumbai 400 005, India;

Department of Condensed Matter Physics and Materials' Science, Tata Institute of Fundamental Research, Colaba, Mumbai 400 005, India;

Department of Condensed Matter Physics and Materials' Science, Tata Institute of Fundamental Research, Colaba, Mumbai 400 005, India;

Department of Physics, University of Warwick, Coventry CV4 7AL, United Kingdom;

Department of Condensed Matter Physics and Materials' Science, Tata Institute of Fundamental Research, Colaba, Mumbai 400 005, India;

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正文语种 eng
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关键词
antiferromagnetics; electronic structure of disordered solids; disordered structures;

机译：反铁磁无序固体的电子结构;无序结构;

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Evolution of the electronic structure of H0B4 with temperature

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