Benchmark Many-Body GW and Bethe–Salpeter Calculations for Small Transition Metal Molecules

2014 ◽  
Vol 10 (9) ◽  
pp. 3934-3943 ◽  
Author(s):  
Sabine Körbel ◽  
Paul Boulanger ◽  
Ivan Duchemin ◽  
Xavier Blase ◽  
Miguel A. L. Marques ◽  
...  
Keyword(s):  
Transition Metal ◽  
Many Body ◽  
Transition Metal Molecules

Manganese-centered tubular boron cluster – MnB16−: A new class of transition-metal molecules

2016 ◽  
Vol 144 (15) ◽  
pp. 154310 ◽  
Author(s):  
Tian Jian ◽  
Wan-Lu Li ◽  
Ivan A. Popov ◽  
Gary V. Lopez ◽  
Xin Chen ◽  
...  
Keyword(s):  
Transition Metal ◽  
Boron Cluster ◽  
New Class ◽  
Transition Metal Molecules

scholarly journals Tunable discrete scale invariance in transition-metal pentatelluride flakes

2020 ◽  
Vol 5 (1) ◽  
Author(s):  
Yanzhao Liu ◽  
Huichao Wang ◽  
Haipeng Zhu ◽  
Yanan Li ◽  
Jun Ge ◽  
...  
Keyword(s):  
Transition Metal ◽  
Scale Invariance ◽  
Bound States ◽  
Scale Factor ◽  
Coulomb Interactions ◽  
Many Body ◽  
Body Effect ◽  
Discrete Scale Invariance ◽  
The Many ◽  
Discrete Scale

AbstractLog-periodic quantum oscillations discovered in transition-metal pentatelluride give a clear demonstration of discrete scale invariance (DSI) in solid-state materials. The peculiar phenomenon is convincingly interpreted as the presence of two-body quasi-bound states in a Coulomb potential. However, the modifications of the Coulomb interactions in many-body systems having a Dirac-like spectrum are not fully understood. Here, we report the observation of tunable log-periodic oscillations and DSI in ZrTe5 and HfTe5 flakes. By reducing the flakes thickness, the characteristic scale factor is tuned to a much smaller value due to the reduction of the vacuum polarization effect. The decreasing of the scale factor demonstrates the many-body effect on the DSI, which has rarely been discussed hitherto. Furthermore, the cut-offs of oscillations are quantitatively explained by considering the Thomas-Fermi screening effect. Our work clarifies the many-body effect on DSI and paves a way to tune the DSI in quantum materials.

NOVEL MANY-BODY EFFECTS IN PHOTOEMISSION AND INVERSE PHOTOEMISSION SPECTRA OF ULTRATHIN TRANSITION-METAL FILMS

1991 ◽  
Vol 05 (08) ◽  
pp. 1147-1178 ◽  
Author(s):  
CHANGFENG CHEN
Keyword(s):  
Transition Metal ◽  
Local Density ◽  
Many Body ◽  
Strongly Correlated Electron ◽  
Correlated Electron Systems ◽  
Nickel Iron ◽  
Correlated Electron ◽  
Inverse Photoemission ◽  
Recent Developments ◽  
Many Body Effects

We present an overview of some recent developments in the theoretical modeling of transition-metal systems, particularly the ultrathin-film structures, focusing on the effects of electron-electron interactions. We describe the progress in the understanding of how to model realistic strongly correlated electron systems using and going beyond the local-density-approximation single-particle electronic structures. Results of exact many-body calculations of photoemission and inverse photoemission spectra of ultrathin nickel, iron and cobalt films are shown to illustrate the application of our approach. Interesting new features induced by many-body effects are found and discussed. Comparison with available experimental results is presented and further work, both experimental and theoretical, is suggested.

Sign in / Sign up

Export Citation Format

Share Document