Electronic structure ofYb2.75C60

Abstract

Ultraviolet photoemission spectra of Yb 2.75 C 60 thin films are measured. The valence band is a wide hump centered at ϳ0.8 eV below the Fermi level. The result also indicates the semiconducting property of Yb 2.75 C 60 since no Fermi edge is observed. The hybridization between 6s states of Yb and the lowest-unoccupiedmolecular-orbital ͑LUMO͒ band of C 60 is non-negligible although it should not be considered to be strong. More than 14% of Yb 6s electrons are estimated to be distributed in the covalent bonds between Yb and C 60 . The spectra for submonolayer C 60 on Yb film reveal that Yb 6s electrons can easily transfer to C 60 and such demonstrate that the bonding in Yb 2.75 C 60 is mainly ionic. The LUMOϩ1 orbital of the submonolayer C 60 is partially occupied, which is different from the case in Yb 2.75 C 60 . There is no evidence of trivalent Yb in the spectra.

Relativistic three-partite non-locality

“…The fact that our general results are consistent with previous studies in two-particle systems [16][17][18][19][20][21][22][23][24][25][26], supports these results against some other results to their contrary [54,[56][57][58]. However, it is clear that one can also find certain measurements that leave the correlation functions unchanged in the moving frame, thus leading to invariance of such inequalities [16, 23-26, 56, 57] as well as finding particular cases which lead to maximization of their violation in certain moving frames [27,28].…”

“…We now set out to consider how |S v | behaves under LT when the measurement setup are chosen to maximize its value in the rest frame (S) and keeping the condition that the same measurement setup is used in S ′ . We will see that under such conditions the various three-particle systems considered will show consistent and reasonable behavior, devoid of previous inconsistency when |M | and/or |M ′ | are used to evaluate non-locality under LT. Our results are also in line with well-known results of two-particle systems which have been studied using Bell's inequality [17][18][19][20][21][22][23][24][25][26].…”

“…He concludes that the violation of the |M | inequality in the moving frame, when the speed of the boost increases (β −→ 1) and if the directions of the measurements are fixed, depends on the energy of the particles in the S frame. This results disagrees with the two-particle non-local systems [16][17][18][19][20][21][22][23][24][25][26]. Similar to the Bell state [16,[23][24][25][26], Moradi et al have shown that in the moving frame, by choosing special measurements, one can find maximum violation of the |M | inequality [56].…”

Dynamical Jahn‐Teller effect in the first excited

“…The importance is also suggested in recently reported light‐induced superconductivity of alkali‐doped fullerides . Moreover, JT effect involving the NLUMOs must be significant in highly alkali doped and alkali‐earth/rare‐earth doped fullerides …”

Chaotic dynamics in a macrospin spin-torque nano-oscillator with delayed feedback

“…[1][2][3] They are typically based on magnetoresistive stacks, whereby spin-torques exerted by the flow of spin-polarized currents result in the selfsustained oscillation of the magnetization in the free layer. [4][5][6][7] The oscillation state can comprise (quasi-)uniform precession, 8,9 spin wave bullets, 10 coupled precession modes in synthetic antiferromagnets 11,12 and ferrimagnets, 13 gyrating vortices [14][15][16][17][18] and skyrmions, 19 and dynamical droplet solitons. 20 Delayed feedback in dynamical systems, whereby the output signal of a system is sent back into its input with amplification and delay, can result in a variety of nonlinear behaviors.…”