Presentation Information
[PCP2-04]Spatial variation of electronic states in LaTe3
*Atsushi Nomura1,2, Hideaki Sakata2 (1. Nihon University (Japan), 2. Tokyo University of Science (Japan))
Keywords:
Charge density wave,Rare-earth tritellurides,STM,STS
The rare-earth tritellurides RTe3 (R =La, Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm) are two-dimensional layered materials that exhibit charge density waves (CDW), superconductivity, and other quantum properties [1]. LaTe3 is one of the members that have attracted attention. It exhibits a CDW whose wave vector has been reported as qCDW = 0.27–0.28c´ [2–4]. Although the CDW transition temperature has not yet been precisely determined, it is believed to exceed 600 K. In addition to the CDW, intriguing phenomena such as large magnetoresistance and nodal lines have been observed in LaTe3, and their relationship with the CDW has been discussed [4, 5].
On the other hand, a recent study using scanning tunneling microscopy (STM) has reported the existence of a superstructure with a period corresponding to about 43 times the lattice constant, in addition to the previously known CDW [6]. However, the nature and origin of this structure remain unresolved. Since the presence of this structure may influence the relationship between the CDW and the physical properties of LaTe3, further investigation is required.
In this study, we investigated the superstructure by STM measurements at various bias voltages and by scanning tunneling spectroscopy (STS). In the symposium, we will discuss the nature and origin of the superstructure based on the obtained experimental results.
References1) K. Yumigeta et al., Adv. Sci. 8, 2004762 (2021)2) C. D. Malliakas and M. G. Kanatzidis, J. Am. Chem. Soc. 128, 12612 (2006)3) A. Kogar et al., Nat. Phys. 16, 159 (2020)4) S. Sarkar et al., Nat. Commun. 14, 3628 (2023)5) A. Pariari et al., Phys. Rev. B 104, 155147 (2021)6) G.-Y. Xian et al., Chin. Phys. Lett., 40, 087402 (2023)
On the other hand, a recent study using scanning tunneling microscopy (STM) has reported the existence of a superstructure with a period corresponding to about 43 times the lattice constant, in addition to the previously known CDW [6]. However, the nature and origin of this structure remain unresolved. Since the presence of this structure may influence the relationship between the CDW and the physical properties of LaTe3, further investigation is required.
In this study, we investigated the superstructure by STM measurements at various bias voltages and by scanning tunneling spectroscopy (STS). In the symposium, we will discuss the nature and origin of the superstructure based on the obtained experimental results.
References1) K. Yumigeta et al., Adv. Sci. 8, 2004762 (2021)2) C. D. Malliakas and M. G. Kanatzidis, J. Am. Chem. Soc. 128, 12612 (2006)3) A. Kogar et al., Nat. Phys. 16, 159 (2020)4) S. Sarkar et al., Nat. Commun. 14, 3628 (2023)5) A. Pariari et al., Phys. Rev. B 104, 155147 (2021)6) G.-Y. Xian et al., Chin. Phys. Lett., 40, 087402 (2023)