Fermi surface of LaSb2 and direct observation of a CDW transition

被引：5

作者：

Palacio, I. ^{[1
,6
]}

Obando-Guevara, J. ^{[2
,3
]}

Chen, L. ^{[2
]}

Nair, M. N. ^{[1
]}

Bario, M. A. Gonzalez ^{[3
]}

Papalazarou, E. ^{[2
]}

Le Fevre, P. ^{[1
]}

Taleb-Ibrahimi, A. ^{[1
]}

Michel, E. G. ^{[4
,5
]}

Mascaraque, A. ^{[3
]}

Tejeda, A. ^{[1
,2
]}

机构：

[1] Synchrotron SOLEIL, Orme Merisiers, F-91192 Gif Sur Yvette, France

[2] Univ Paris Saclay, LPS, Orsay, France

[3] Univ Complutense Madrid, Dept Fis Mat, Madrid, Spain

[4] Univ Autonoma Madrid, Dept Fis Mat Condensada, Madrid 28049, Spain

[5] Univ Autonoma Madrid, Condensed Matter Phys Ctr IFIMAC, Madrid 28049, Spain

[6] CSIC, Inst Ciencia Mat Madrid, C Sor Juana Ines Cruz 3, Madrid 28049, Spain

来源：

APPLIED SURFACE SCIENCE | 2023年 / 610卷

关键词：

Layered material; Charge density wave; Angle -resolved photoemission; Density functional theory; CHARGE-DENSITY-WAVE; TOTAL-ENERGY CALCULATIONS; ELECTRONIC-STRUCTURE; SUPERCONDUCTIVITY;

D O I：

10.1016/j.apsusc.2022.155477

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We have studied the temperature-dependent electronic structure of the light rare-earth antimonide LaSb2 by combining angle-resolved photoemission (ARPES) measurements and density functional theory (DFT) calcula-tions. ARPES measurements show the appearance of band replicas in the low-temperature Fermi surface with q = 0.25 +/- 0.02 A-1 and a band folding of the same periodicity with a considerable spectral weight in the folded band. From our calculations we elucidate that the folded band exhibiting the new periodicity is associated with the La-Sb layer. We propose that an in-plane distortion, probably affecting the whole unit cell, is the structural modification related to the electronic changes. All these results converge to support that a charge density wave is stabilized in LaSb2 at low temperature.

引用

页数：8

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