Mott Transition in the Mass Imbalanced Ionic Hubbard Model at Half Filling

Nguyen Thi Hai Yen; Le Duc Anh; Hoang Anh Tuan; Nguyen Toan Thang; Nguyen Thi Huong

doi:10.15625/0868-3166/29/3SI/14265

Mott Transition in the Mass Imbalanced Ionic Hubbard Model at Half Filling

Nguyen Thi Hai Yen, Le Duc Anh, Hoang Anh Tuan, Nguyen Toan Thang, Nguyen Thi Huong

Author affiliations

Authors

Nguyen Thi Hai Yen Institute of Physics, Vietnam Academy of Science and Technology (VAST)
Le Duc Anh Hanoi National University of Education
Hoang Anh Tuan Institute of Physics, Vietnam Academy of Science and Technology (VAST) and Graduate University of Science and Technology, VAST
Nguyen Toan Thang Institute of Physics, Vietnam Academy of Science and Technology
Nguyen Thi Huong Thuy loi University

DOI:

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.

Downloads

Published

22-10-2019

How to Cite

[1]

N. T. H. Yen, L. D. Anh, H. A. Tuan, N. T. Thang and N. T. Huong, Mott Transition in the Mass Imbalanced Ionic Hubbard Model at Half Filling, Comm. Phys. 29 (2019) 305. DOI: https://doi.org/10.15625/0868-3166/29/3SI/14265.

Download Citation

Issue

Vol. 29 No. 3SI (2019)

Section

Papers

License

Authors who publish with CIP agree with the following terms:

The manuscript is not under consideration for publication elsewhere. When a manuscript is accepted for publication, the author agrees to automatic transfer of the copyright to the editorial office.
The manuscript should not be published elsewhere in any language without the consent of the copyright holders. Authors have the right to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal’s published version of their work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
Authors are encouraged to post their work online (e.g., in institutional repositories or on their websites) prior to or during the submission process, as it can lead to productive exchanges or/and greater number of citation to the to-be-published work (See The Effect of Open Access).