Stability of the spin-1/2 kagome ground state with breathing anisotropy

被引：22

作者：

Repellin, Cecile ^{[1
]}

He, Yin-Chen ^{[2
]}

Pollmann, Frank ^{[3
]}

机构：

[1] Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany

[2] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA

[3] Tech Univ Munich, Phys Dept T42, D-85747 Garching, Germany

来源：

PHYSICAL REVIEW B | 2017年 / 96卷 / 20期

关键词：

MATRIX RENORMALIZATION-GROUP; QUANTUM ANTIFERROMAGNETS; TOPOLOGICAL ORDER; SYSTEMS; LATTICE; DEGENERACY; LIQUIDS; MODEL;

D O I：

10.1103/PhysRevB.96.205124

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We numerically study the spin-1/2 breathing kagome lattice. In this variation of the kagome Heisenberg antiferromagnet, the spins belonging to upward and downward facing triangles have different coupling strengths. Using the density matrix renormalization group (DMRG) method and exact diagonalization, we show that the kagome antiferromagnet spin liquid is extremely robust to this anisotropy. Materials featuring this anisotropy-and especially the recently studied vanadium compound [NH4](2)[C7H14N][V7O6F18] (DQVOF)-may thus be very good candidates to realize the much studied kagome spin liquid. Further, we closely examine the limit of strong breathing anisotropy and find indications of a transition to a nematic phase.

引用

页数：11

共 56 条

[1]

Aidoudi FH, 2011, NAT CHEM, V3, P801, DOI [10.1038/nchem.1129, 10.1038/NCHEM.1129]

[2] THE RESONATING VALENCE BOND STATE IN LA2CUO4 AND SUPERCONDUCTIVITY [J].

ANDERSON, PW .

SCIENCE, 1987, 235 (4793) :1196-1198

[3] Spin liquids in frustrated magnets [J].

Balents, Leon .

NATURE, 2010, 464 (7286) :199-208

[4] Low-energy singlets in the Heisenberg antiferromagnet on the kagome lattice [J].

Budnik, R ;

Auerbach, A .

PHYSICAL REVIEW LETTERS, 2004, 93 (18) :187205-1

[5] Numerical contractor renormalization method for quantum spin models -: art. no. 104424 [J].

Capponi, S ;

Läuchli, A ;

Mambrini, M .

PHYSICAL REVIEW B, 2004, 70 (10) :104424-1

[6]

Changlani H. J., ARXIV170304659

[7] Gapless Spin Liquid Ground State in the S=1/2 Vanadium Oxyfluoride Kagome Antiferromagnet [NH4]2[C7H14N][V7O6F18] [J].

Clark, L. ;

Orain, J. C. ;

Bert, F. ;

De Vries, M. A. ;

Aidoudi, F. H. ;

Morris, R. E. ;

Lightfoot, P. ;

Lord, J. S. ;

Telling, M. T. F. ;

Bonville, P. ;

Attfield, J. P. ;

Mendels, P. ;

Harrison, A. .

PHYSICAL REVIEW LETTERS, 2013, 110 (20)

[8] Nature of the Spin-Liquid Ground State of the S=1/2 Heisenberg Model on the Kagome Lattice [J].

Depenbrock, Stefan ;

McCulloch, Ian P. ;

Schollwoeck, Ulrich .

PHYSICAL REVIEW LETTERS, 2012, 109 (06)

[9] NUCLEAR ANTIFERROMAGNETISM IN A REGISTERED HE-3 SOLID [J].

ELSER, V .

PHYSICAL REVIEW LETTERS, 1989, 62 (20) :2405-2408

[10] Frustrated Antiferromagnets with Entanglement Renormalization: Ground State of the Spin-1/2 Heisenberg Model on a Kagome Lattice [J].

Evenbly, G. ;

Vidal, G. .

PHYSICAL REVIEW LETTERS, 2010, 104 (18)

← 1 2 3 4 5 6 →