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57Fe-Mossbauer spectra of superconducting beta-FeSe, the Li/NH3 intercalate product and a subsequent sample of this intercalate treated with moist He gas have been measured in temperature range 4.7 - 290 K. A correlation is established…

Contact electrification give rise to charge accumulation at the interface when two materials are brought into contact with each other. The charge accumulation at the interface will diffuse to the interior of the conducting material if the…

Mesoscale and Nanoscale Physics · Physics 2026-01-21 Sandeep Kumar , Ravindra G Bhardwaj

We investigate the prospects of controlling charge-exchange in ultracold collisions of heteroisotopic combinations of atoms and ions of the same element. The treatment, readily applicable to alkali or alkanine-earth metals, is illustrated…

Atomic Physics · Physics 2017-06-26 Marko Gacesa , Robin Côté

We studied by M\"{o}ssbauer spectroscopy the Na$_{0.82}$CoO$_2$ compound using 1% $^{57}$Fe as a local probe which substitutes for the Co ions. M\"{o}ssbauer spectra at T=300 K revealed two sites which correspond to Fe$^{3+}$ and Fe$^{4+}$.…

Superconductivity · Physics 2007-05-23 M. Pissas , V. Psycharis , D. Stamopoulos , G. Papavassiliou , Y. Sanakis , A. Simopoulos

Plasmons in low dimensional materials provide a powerful platform for nanoscale control of light matter interactions, yet strategies to tailor their coherence and dissipation remain limited. Here, we demonstrate that transition metal…

Despite the weak, van-der-Waals interlayer coupling, photoinduced charge transfer vertically across atomically thin interfaces can occur within surprisingly fast, sub-50fs timescales. Early theoretical understanding of the charge transfer…

Photo-induced charge transfer of positive and negative charges across the interface between an ordered organic semiconductor and a polymeric insulator is observed in the field-effect experiments. Immobilization of the transferred charge in…

Materials Science · Physics 2009-11-10 V. Podzorov , M. E. Gershenson

Although physisorption is a widely occurring mechanism of bonding at the organic/metal interface, contradictory interpretations of this phenomenon are often reported. Photoemission and X-ray absorption spectroscopy investigations of…

Mono- and multilayer FeSe thin films grown on SrTiO$_\mathrm{3}$ and BiTiO$_\mathrm{3}$ substrates exhibit a greatly enhanced superconductivity over that found in bulk FeSe. A number of proposals have been advanced for the mechanism of this…

Superconductivity · Physics 2016-05-04 Y. Wang , K. Nakatsukasa , L. Rademaker , T. Berlijn , S. Johnston

Intercalation reactions modify the charge density in van der Waals (vdW) materials through coupled electronic-ionic charge accumulation, and are susceptible to modulation by interlayer hybridization in vdW heterostructures. Here, we…

The full monolayer of pentacene adsorbed on rutile TiO$_2$(110) provides an intriguing model to study charge-transfer excitations where the optically excited electrons and holes reside on different sides of the internal interface between…

Materials Science · Physics 2016-10-07 M. P. Ljungberg , O. Vänskä , P. Koval , S. W. Koch , M. Kira , D. Sánchez-Portal

We describe the process of Foerster transfer between semiconductor nanoparticles in the presence of a metal subsystem (metal nanocrystals). In the presence of metal nanocrystals, the Foerster process can become faster and more long-range.…

Mesoscale and Nanoscale Physics · Physics 2009-11-11 Alexander O. Govorov , Jaebeom Lee , Nicholas A. Kotov

Complex oxides exhibit many intriguing phenomena, including metal-insulator transition, ferroelectricity/multiferroicity, colossal magnetoresistance and high transition temperature superconductivity. Advances in epitaxial thin film growth…

Strongly Correlated Electrons · Physics 2017-06-07 Hanghui Chen , Andrew J. Millis

Recent theoretical studies show that nanoscale contact on dielectric substrates can induce flexoelectric polarization large enough to drive electron transfer. This has been supported by experimental evidence, indicating that contact…

Applied Physics · Physics 2026-03-10 Han Hu , Xiaoying Zhuang , Timon Rabczuk

The key factors governing the single-phase or multi-phase structural change behaviors during the intercalation/deintercalation of guest ions have not been well studied and understood yet. Through systematic studies of orthorhombic…

A method for study of charge-transfer interactions between solute molecules and solvent based on the comparison of the ratios of spectral shifts of different electronic transitions in solute molecules in chemically inert solvent is…

Soft Condensed Matter · Physics 2016-06-29 I. A. Ar'ev , N. I. Lebovka , E. A. Solovieva

New FeSe-based intercalation superconductors, $A_x$(C$_8$H$_{11}$N)$_y$Fe$_{1-z}$Se ($A$ = Li, Na), with $T_\mathrm{c}$ = 39-44 K have been successfully synthesized via the intercalation of alkali metals and 2-phenethylamine into FeSe. The…

Superconductivity · Physics 2016-09-21 Takehiro Hatakeda , Takashi Noji , Kazuki Sato , Takayuki Kawamata , Masatsune Kato , Yoji Koike

In this letter, the transient behavior of a ferroelectric (FE) metal-oxide-semiconductor (MOS) capacitor is theoretically investigated with a series resistor. It is shown that compared to a conventional high-k dielectric MOS capacitor, a…

Applied Physics · Physics 2018-07-04 Sou-Chi Chang , Uygar E. Avci , Dmitri E. Nikonov , Ian A. Young

Bulk FeSe becomes superconducting below 9\,K, but the critical temperature (T$_{c}$) is enhanced almost universally by a factor of $\sim$4-5 when it is intercalated with alkali elements. How intercalation modifies the structure is known…

Superconductivity · Physics 2023-03-07 Swagata Acharya , Mikhail I. Katsnelson , Mark van Schilfgaarde

Charge transfer in type-II heterostructures plays important roles in determining device performance for photovoltaic and photocatalytic applications. However, current theoretical studies of charge transfer process don't consider the effects…

Materials Science · Physics 2023-08-09 Zhi-Guo Tao , Guo-Jun Zhu , Weibin Chu , Xin-Gao Gong , Ji-Hui Yang
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