We present a temperature-dependent infrared spectroscopy study on the layered topological semimetal Nb$_3$SiTe$_6$ combined with density-functional theory (DFT) calculations of electronic band structure and optical conductivity. Our results reveal an anisotropic behavior in-plane ($ac$-plane) conductivity, three pronounced excitations located at around 0.15, 0.28, 0.41~eV for polarization incid...

The field of oxide spintronics can strongly benefit from the establishment robust ferromagnetic insulators with near room-temperature Curie temperature. Here we investigate structural, electronic, and magnetic properties atomically-precise epitaxially-strained thin films double perovskite La$_2$NiMnO$_6$ (LNMO) grown by off-axis radio-frequency magnetron sputtering. We find that retain both a s...

The use of water-soluble sacrificial layer Sr$_3$Al$_2$O$_6$ has tremendously boosted the research on freestanding functional oxide thin films, especially thanks to its ultimate capability produce high-quality epitaxial perovskite films. However, costly single-crystalline substrates, e.g. SrTiO$_3$, were generally discarded after obtaining Here, we demonstrate that SrTiO$_3$ substrates can be r...

We classify a supersymmetric extension of the Standard Model by discrete symmetries originating from finite modular $\Gamma_N$. Since all couplings in theories $\Gamma_N$ are described holomorphic forms with even weights, renormalizable and non-renormalizable operators such as baryon- and/or lepton-number violating severely constrained. From transformation matter multiplets weight $1/M$, we fin...

Tournaments are orientations of the complete graph. The directed Ramsey number R(k) is minimum vertices a tournament must have to be guaranteed contain transitive subtournament size k, which we denote by $$ TT _k$$ . We include computer-assisted proof conjecture Sanchez-Flores in Graphs Combinatorics 14(2), 181–200 (1998), that all _6$$ -free tournaments on 24 and 25 subtournaments ST _{27}$$ ,...

Abstract The bandwidth of a $${\mathbb C}^*$$ C ∗ -action polarized pair ( X , L ) is natural measure its complexity. In this paper, we study -actions on rational homogeneous spaces, determining which provide minimal bandwidth. We prove that the l...

A vibrational wavepacket in SF$_6$, created by impulsive stimulated Raman scattering with a few-cycle infrared pulse, is mapped onto five sulfur core-excited states using table-top soft X-ray transient absorption spectroscopy between 170-200 eV. The amplitudes of the energy shifts femtosecond oscillations depend strongly on nature state. prepared controlled pump laser intensity to probe levels ...

The unequal electronic occupation of localized orbitals (orbital polarization), and associated lowering symmetry degeneracy, play an important role in the properties transition metal oxides. Here, we examine systematically underlying origin orbital polarization, taking as exemplar 3$d$ manifold Co$^{2+}$ a variety spin, structural phases double perovskite La$_2$CoTiO$_6$ (001) superlattice (LaC...

Let $\go{g}$ be a finite-dimensional semi-simple Lie algebra, $\go{h}$ a Cartan subalgebra of $\go{g}$, and $W$ its Weyl group. The group $W$ acts diagonally on $V:=\go{h}\oplus\go{h}^*$, as well as on $\mathbb{C}[V]$. The purpose of this article is to study the Poisson homology of the algebra of invariants $\mathbb{C}[V]^W$ endowed with the standard symplectic bracket. To begin with, we give g...

Complex organic molecules with three carbon atoms are found in the earliest stages of star formation. In particular, propenal (C$_2$H$_3$CHO) is a species interest due to its implication formation more complex and even biotic molecules. This study aims search for presence C$_2$H$_3$CHO other three-carbon such as propylene (C$_3$H$_6$) hot corino region low-mass protostellar binary IRAS 16293--2...