Stripe phases in a frustrated spin-1/2 dimer Heisenberg model

Guo, Long-Fei; Chen, Q.-H.; Li, P.

doi:10.1142/s0217979214501434

Cited by 2 publications

(2 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Combination of these two apparently antithetical properties has attracted the attentions of both experimentalists and theorists, and searching for this phase has become one of the main subjects of condensed matter and cold atoms physics [5,6,7,8,9,10,11,12]. An appropriate ground for searching various supersolid phases are quantum spin systems [13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34]. Recently it has been shown experimentally that mixed-spin systems, composed of two kinds of spin, display various supersolid phases in their ground state phase diagrams [35,36].…”

Section: Introductionmentioning

confidence: 99%

Mixed-spin system with supersolid phases: magnetocaloric effect and thermal properties

Heydarinasab

Abouie

2020

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

Recently, it has been shown that two dimensional frustrated mixedspin systems with anisotropic exchange interactions display supersolid phases in their ground state phase diagrams even in the absence of long-range interactions. In this paper, using cluster mean field theory, we investigate the effects of thermal fluctuations on the ground state phases of this kind of systems and show that various thermal solids and thermal insulators emerge around the ground state solid and Mott insulating phases. We also study the thermodynamic properties and magnetocaloric effect of these systems and demonstrate that at low temperatures, a large cooling rate is seen in the vicinity of the solid-supersolid, solid-superfluid and Mott insulator-superfluid critical points, with the large accumulation of the entropy and the minimums of the isentropes. Our results show the sign change of the magnetocaloric parameter inside the solids and the Mott insulator, which is a characteristic of ordered phases.

show abstract

Section: Introductionmentioning

confidence: 99%

Mixed-spin system with supersolid phases: magnetocaloric effect and thermal properties

Heydarinasab

Abouie

2020

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

show abstract

“…Another appropriate ground for searching various supersolid phases are quantum spin systems. It has been shown that 1D spin-1 chains [41,42,43], 2D frustrated spin-1/2 [44,45,46,47,48,49,50,51,52,53,54,55] and spin-1 [56,57,58,59] models in an external magnetic field and 3D spin models [60,61] possess different kinds of stripe, checkerboard and star supersolid phases. However, in spite of many studies on uniform spin systems, the supersolidity of mixed-spin systems has not been addressed so far.…”

Section: Introductionmentioning

confidence: 99%

Spin supersolid phase in coupled alternating spin chains

Heydarinasab¹,

Abouie²

2018

Sci Rep

View full text Add to dashboard Cite

We study the ground state phase diagram of a two dimensional mixed-spin system of coupled alternating spin-1 and 1/2 chains with a stripe supersolid phase. Utilizing different analytical and numerical approaches such as mean field approximation, cluster mean field theory and linear spin wave theory, we demonstrate that our system displays a rich ground state phase diagram including novel stripe supersolid, solids with different fillings and super-counterfluid phases, in addition to a stripe solid with half filling, superfluid and Mott insulating phases. In order to find a minimal mixed-spin model for stripe supersolidity, in the second part of the paper we consider two kinds of mixed-spin system of coupled alternating spin-1 and 1/2 chains with (i) anisotropic nearest neighbor interactions, (ii) anisotropic hoppings and study their ground state phase diagrams. We demonstrate that, for the systems with uniform hoppings, the repulsive intra-chains interactions are necessary for stripe supersolidity. In this case the minimal two dimensional mixed-spin model is a system of spin-1 and spin-1/2 XXZ chains, interacting via Ising Hamiltonian. In the case of anisotropic hoppings, a system of coupled Ising chains is the minimal model.

show abstract

Stripe phases in a frustrated spin-1/2 dimer Heisenberg model

Cited by 2 publications

References 18 publications

Mixed-spin system with supersolid phases: magnetocaloric effect and thermal properties

Mixed-spin system with supersolid phases: magnetocaloric effect and thermal properties

Spin supersolid phase in coupled alternating spin chains

Contact Info

Product

Resources

About