We have synthesized high-quality, micrometer-sized, single-crystal GeSe nanosheets using vapor transport and deposition techniques. Photoresponse is investigated based on mechanically exfoliated GeSe nanosheet combined with Au contacts under a global laser irradiation scheme. The nonlinearship, asymmetric, and unsaturated characteristics of the I-V curves reveal that two uneven back-to-back Sch...

We present two new notions of evolutionary stability, the truly evolutionarily stable state (TESS ) and the generalized evolutionarily stable equilibrium (GESE ). The GESE generalizes the evolutionarily stable equilibrium (ESE ) of Joosten [1996]. An ESE attracts all nearby trajectories monotonically, i.e., the Euclidean distance decreasing steadily in time. For a GESE this property should hold...

SnS, GeSe, and GeS Ruixiang Fei, Wenbin Li, Ju Li, and Li Yang Department of Physics, Washington University, St. Louis, Missouri 63130, USA Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA Department of Nuclear Science and Engineering and Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridg...

[{Mn(tmeda)}(3){GeSe(3)(OMe)}(2)] (), synthesized by the reaction of [K(4)(H(2)O)(3)][Ge(2)Se(6)] with MnCl(2).4H(2)O in MeOH-tmeda (tmeda = N,N,N',N'-tetramethyl-1,2-diaminoethane), exhibits an isosceles triangular arrangement of Mn(2+) ions that are antiferromagnetically coupled with an S = 3/2 ground state.

Recently, germanium selenide (GeSe) has emerged as a promising van der Waals semiconductor for photovoltaics, solar light harvesting, and water photoelectrolysis cells. Contrary to previous reports claiming perfect ambient stability based on experiments with techniques without surface sensitivity, here, by means of surface-science investigations density functional theory, it is demonstrated tha...

Abstract Layered hexagonal γ -GeSe, a new polymorph of germanium selenide (GeSe) synthesized recently, shows strikingly high electronic conductivity in its bulk form (even higher than graphite) while semiconducting the case monolayer (1L). In this work, by using first-principles calculations, we demonstrate that, different from orthorhombic phases GeSe, -GeSe small spatial anisotropic dependenc...

Compared with a two-dimensional (2D) homogeneous channel, the introduction of 2D/2D homojunction or heterojunction is promising method to improve performance tunnel field-effect transistor (TFET), mainly by controlling tunneling barrier. We simulate 10-nm-Lg double-gated GeSe TFETs and van der Waals (vdW) GeSe/GeTe based on ballistic quasi-static ab initio quantum transport simulation. Two devi...

Abstract We compute the spectrum of pure spin current injection in ferroelectric single-layer SnS, SnSe, GeS, and GeSe. The formalism takes into account coherent dynamics optically excited conduction states split energy by spin–orbit coupling. velocity electron’s spins is calculated as a function incoming photon angle linearly polarized light within full electronic band structure scheme using d...

We used high-resolution glass capillary columns to study the trimethylsilyl derivatives of some acidic metabolites found in pooled urine specimens form control and postpartum subjects. About 30 compounds were identified by gas chromatography-mass spectrometry-computer techniques. In general, open tubular capillary columns effect better resolution of trimethylsilyl derivatives of organic acids t...