NbI4 crystallizes in the orthorhombic Cmc2_1 space group. The structure is one-dimensional and consists of four NbI4 ribbons oriented in the (1, 0, 0) direction. Nb4+ is bonded to six I1- atoms to form edge-sharing NbI6 octahedra.

1998年11月20日 · Niobium tetraiodide, NbI 4, is a quasi one-dimensional semiconductor at atmospheric pressure [1] that crystallizes in the orthorhombic space group Cmc 2 1 at ambient conditions [2]. The structure of NbI 4 is based on a distorted …

2019年2月1日 · We carry out a systematic study of polarized- and temperature-dependent Raman scattering of layered Weyl semimetal NbIrTe 4 on the (002) crystal surface, under parallel and perpendicular polarization Raman spectroscopy geometry in back scattering way, the angle-dependent Raman peaks intensity is recorded by rotating the single crystal from 0 ...

2024年7月31日 · Here, the $ {\mathrm {NbI}}_ {4}$ bulk is theoretically demonstrated as a quasi-one-dimensional sliding ferroelectric material, which exhibits a polarization of $0.11\phantom {\rule {0.28em} {0ex}}\textmu {}\mathrm {C}/ {\mathrm {cm}}^ {2}$ perpendicular to the Nb's chains.

2021年4月14日 · In this paper we use polarized angular-resolved Raman scattering in NbIrTe 4, a possible Type II Weyl semimetal, to show that one can extract the Raman tensor elements for each phonon mode from...

Structural studies of NbI4 at high pressures. H. Kawamura N. Matsui I. Nakahata Mototada Kobayashi Y. Akahama I. Shirotani

2024年2月23日 · We report the results of polarization-dependent Raman spectroscopy of phonon states in single-crystalline quasi-one-dimensional NbTe 4 and TaTe 4 van der Waals materials. The measurements were conducted in the wide temperature range from 80 to 560 K.

Here we show that the two-phonon Raman scattering from NbC can be unusually strong and sharp, much stronger than previously observed on bulk samples. The Raman spectra have

In this paper, the quasi-one-dimensional NbI4 vdW bulk with 4d1 electron configuration will be theoretically studied. The two chains within one primitive cell can slide, which leads to a dipole...

Ivanovo State University. Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences. Translated from Zhurnal Strukturnoi Khimii, Vol. 33, No. 4 ...