Valence-bond crystal phase of the crossed-chain quantum spin model
نویسندگان
چکیده
منابع مشابه
Quantum melting of valence-bond crystal insulators and novel supersolid phase at commensurate density.
Bosonic and fermionic Hubbard models on the checkerboard lattice are studied numerically for infinite on-site repulsion. At particle density n=1/4 and strong nearest-neighbor repulsion, insulating Valence-Bond crystals (VBC) of resonating particle pairs are stabilized. Their melting into superfluid or metallic phases under increasing hopping is investigated at T=0 K. We identify a novel and unc...
متن کاملThe Valence Bond Glass phase
We show that a new glassy phase can emerge in presence of strong magnetic frustration and quantum fluctuations. It is a Valence Bond Glass. We study its properties solving the Hubbard-Heisenberg model on a Bethe lattice within the large N limit introduced by Affleck and Marston. We work out the phase diagram that contains Fermi liquid, dimer and valence bond glass phases. This new glassy phase ...
متن کاملPhase diagram of the S=1/2 quantum spin chain with bond alternation.
We study the ground state properties of the bond alternating S = 1/2 quantum
متن کاملResonating valence bond phase in the triangular lattice quantum dimer model.
We study the quantum dimer model on the triangular lattice, which is expected to describe the singlet dynamics of frustrated Heisenberg models in phases where valence bond configurations dominate their physics. We find, in contrast to the square lattice, that there is a truly short ranged resonating valence bond phase with no gapless excitations and with deconfined, gapped, spinons for a finite...
متن کاملValence bond mapping of antiferromagnetic spin chains
Antiferromagnetic spin chains have been the subject of intense interest in recent years, largely due to the conjecture by Haldane that chains built from integer spins should exhibit a gap in their energy spectrum. The existence of this gap, originally predicted on the basis of simple fieldtheoretic considerations, was subsequently confirmed experimentally. Much insight into the properties of an...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review B
سال: 2004
ISSN: 1098-0121,1550-235X
DOI: 10.1103/physrevb.69.064420