Global phase diagram of charge-neutral graphene in the quantum Hall regime for generic interactions
Global phase diagram of charge-neutral graphene in the quantum Hall regime for generic interactions
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量子霍尔体系中电荷中性石墨烯的总体相图,用于一般相互作用
DOI:
10.1103/physrevb.107.125422
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发表时间:
2023
影响因子:
3.7
通讯作者:
Murthy, Ganpathy
中科院分区:
文献类型:
--
作者:
De, Suman Jyoti;Das, Ankur;Rao, Sumathi;Kaul, Ribhu K.;Murthy, Ganpathy
Monolayer graphene at charge neutrality in a quantizing magnetic field is a quantum Hall ferromagnet. Due to the spin and valley (near) degeneracies, there is a plethora of possible ground states. Previous theoretical work, based on a stringent ultra-short-range assumption on the symmetry-allowed interactions, predicts a phase diagram with distinct regions of spin-polarized, canted antiferromagnetic, intervalley coherent, and charge density wave order. While early experiments suggested that the system was in the canted antiferromagnetic phase at a perpendicular field, recent scanning tunneling studies universally find Kekulé bond order, and sometimes also charge density wave order. Recently, it was found that if one relaxes the stringent assumption mentioned above a phase with coexisting canted antiferromagnetic and Kekulé order exists in the region of the phase diagram believed to correspond to real samples. In this paper, starting from the continuum limit appropriate for experiments, we present the complete phase diagram ofgraphene in the Hartree-Fock approximation, using generic symmetry-allowed interactions, assuming translation-invariant ground states up to an intervalley coherence. Allowing for a sublattice potential (valley Zeeman coupling), we find numerous phases with different types of coexisting order. We conclude with a discussion of the physical signatures of the various states.
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影响因子:
19.6
作者:
A. Assouline;M. Jo;P. Brasseur;K. Watanabe;T. Taniguchi;T. Jolicoeur;D. Glattli;N. Kumada;P. Roche;F. Parmentier;P. Roulleau
通讯作者:
P. Roulleau
影响因子:
19.6
作者:
Zibrov, A. A.;Spanton, E. M.;Young, A. F.
通讯作者:
Young, A. F.
DOI:
--
发表时间:
2019
期刊:
影响因子:
--
作者:
Haoxin Zhou;H. Polshyn;T. Taniguchi;Kenji Watanabe;A. Young
通讯作者:
A. Young
影响因子:
56.9
作者:
Liu, Xiaomeng;Farahi, Gelareh;Yazdani, Ali
通讯作者:
Yazdani, Ali
影响因子:
3.7
作者:
N. Stefanidis;Inti Sodemann Villadiego
通讯作者:
Inti Sodemann Villadiego