Papers
Published 22-10-2019
How to Cite
Yen, N. T. H., Anh, L. D., Tuan, H. A., Thang, N. T., & Huong, N. T. (2019). Mott Transition in the Mass Imbalanced Ionic Hubbard Model at Half Filling. Communications in Physics, 29(3SI), 305. https://doi.org/10.15625/0868-3166/29/3SI/14265
Abstract
The Mott - Hubbard metal - insulator transition in the half-filled mass imbalanced ionic Hubbard model is investigated using the two-site dynamical mean field theory. We find that for a fixed mass imbalanced parameter r the critical interaction Uc increases when the ionic energy \(\Delta\) is increased. In the other hand, for a fixed \(\Delta\), \(U_c\) decreases with increasing the mass imbalance. We also show the existence of BI phase in the system for the case \(\Delta \ne 0\), \(U=0\) and calculate the staggered charge density \(n_B − n_A\) as a function of the interaction for different values of the mass imbalance. Our results in the limiting cases (\(r = 1\); \(\Delta \ne 0\) or/and \(\Delta = 0\); \(r\ne 1\)) are in good agreement with those obtained from full dynamical mean field theory.Downloads
Download data is not yet available.
Metrics
Metrics Loading ...
References
- M. Lewenstein, A. Sanpera, V. Ahufinger, B. Damski, A. Sen, and U. Sen, Adv. Phys. 56 (2007) 243.
- I. Bloch et al.,, Rev. Mod. Phys. 80 (2008) 885.
- C. Chin, R. Grimm, P. Julienne, and E. Tiesinga, Rev. Mod. Phys. 82 (2010) 1225.
- W. Hofstetter, J. I. Cirac, P. Zoller, E. Demler, and M. D. Lukin, Phys. Rev. Lett. 89 (2002) 220407.
- R. J ̈ordens, N. Strohmaier, K. Gu ̈nter, H. Moritz, and T. Esslinger, Nature 455 (2008) 204.
- T. Esslinger, Annu. Rev. Condens. Matter Phys. 1 (2010) 129.
- A. Hemmerich, D. Schropp, and T. W. H ̈ansch, Phys. Rev. A 44 (1991) 1910.
- S. Taie, Y. Takasu, S. Sugawa, R. Yamazaki, T. Tsujimoto, R. Murakami, and Y. Takahashi, Phys.
- Rev. Lett. 105 (2010) 190401.
- A. Trenkwalder, C. Kohstall, M. Zaccanti, D. Naik, A. I.Sidorov, F. Schreck, and R. Grimm, Phys.
- Rev. Lett. 106 (2011) 115304.
- C. Kohstall, M. Zaccanti, M. Jag, A. Trenkwalder, P. Massignan, G. M. Bruun, F. Schreck, and R.
- Grimm, Nature (London), 485 (2013) 615.
- M. Jag, M. Zaccanti, M. Cetina, R. S. Lous, F. Schreck, R.Grimm, D. S. Petrov, and J. Levinsen,
- Phys. Rev. Lett. 112 (2014) 075302.
- P. Fazekas, Electron Correlation and Magnetism (World Scientific, Singapore, 1999).
- P. S. Riseborough and J. M. Lawrence, Rep. Prog. Phys. 79 (2016) 084501.
- M. Potthoff, Phys. Rev. B 64 (2001) 165114.
- E.A. Winograd, R. Chitra, M.J. Rozenberg Phys. Rev. B 84 (2011) 233102.
- T.L. Dao et al.,, Phys. Rev. A 85 (2012) 013606.
- Anh-Tuan Hoang, Duc-Anh Le, Physica B 485 (2016) 121.
- L. Craco et al., Phys. Rev. B 78 (2008) 075121.
- A. Garg et al., Phys. Rev. Lett. 97 (2006) 046403.
- .