Biexciton Condensation in Electron-Hole-Doped Hubbard Bilayers: A Sign-Problem-Free Quantum Monte Carlo Study

Physical Review Letters
Xu-Xin HuangThomas P Devereaux

Abstract

The bilayer Hubbard model with electron-hole doping is an ideal platform to study excitonic orders due to suppressed recombination via spatial separation of electrons and holes. However, suffering from the sign problem, previous quantum Monte Carlo studies could not arrive at an unequivocal conclusion regarding the presence of phases with clear signatures of excitonic condensation in bilayer Hubbard models. Here, we develop a determinant quantum Monte Carlo algorithm for the bilayer Hubbard model that is sign-problem-free for equal and opposite doping in the two layers and study excitonic order and charge and spin density modulations as a function of chemical potential difference between the two layers, on-site Coulomb repulsion, and interlayer interaction. In the intermediate coupling regime and in proximity to the SU(4)-symmetric point, we find a biexcitonic condensate phase at finite electron-hole doping, as well as a competing (π,π) charge density wave state. We extract the Berezinskii-Kosterlitz-Thouless transition temperature from superfluid density and a finite-size scaling analysis of the correlation functions and explain our results in terms of an effective biexcitonic hard-core boson model.

References

Apr 1, 1993·Physical Review. B, Condensed Matter·D J ScalapinoS Zhang
Feb 18, 1991·Physical Review Letters·A Moreo, D J Scalapino
Oct 4, 2000·Physical Review Letters·G G Batrouni, R T Scalettar
Apr 17, 2002·Physical Review Letters·Guido SchmidAnsgar Dorneich
May 15, 2002·Physical Review Letters·S De PaloGaetano Senatore
Dec 14, 2004·Nature·J P Eisenstein, A H Macdonald
Apr 19, 2012·Nano Letters·A A HighA C Gossard
Jun 12, 2013·Physical Review Letters·Ryo MaezonoRichard J Needs
Oct 15, 2013·Physical Review Letters·Tarun Grover
Jul 29, 2015·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Jan Kuneš
Dec 9, 2017·Science·Anshul KogarPeter Abbamonte
Mar 21, 2018·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Rajesh O SharmaBhagwati Prasad Bahuguna

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.

Related Papers

Physical Review. B, Condensed Matter
A V Chubukov, K A Musaelian
Physical Review. B, Condensed Matter
A MoreoE Dagotto
Physical Review. B, Condensed Matter
A N AndriotisC M Soukoulis
Physical Review. B, Condensed Matter
E DagottoD Toussaint
Physical Review Letters
G T Zimanyi, E Abrahams
© 2021 Meta ULC. All rights reserved