scholarly journals Ground state of a general electron-phonon Hamiltonian is a spin singlet

1995 ◽  
Vol 51 (5) ◽  
pp. 2812-2821 ◽  
Author(s):  
J. K. Freericks ◽  
Elliott H. Lieb
Keyword(s):  
Ground State ◽  
Spin Singlet

Spin-Singlet Ground State in Two-Dimensional S=1/2 Frustrated Square Lattice: (CuCl)LaNb2O7

2005 ◽  
Vol 74 (6) ◽  
pp. 1702-1705 ◽  
Author(s):  
H. Kageyama ◽  
T. Kitano ◽  
N. Oba ◽  
M. Nishi ◽  
S. Nagai ◽  
...  
Keyword(s):  
Ground State ◽  
Square Lattice ◽  
Singlet Ground State ◽  
Two Dimensional ◽  
Spin Singlet

Spin-singlet quantum ground state in one-dimensional magnet vanadyl diacetate

2019 ◽  
Vol 473 ◽  
pp. 236-240
Author(s):  
E.A. Zvereva ◽  
T.M. Vasilchikova ◽  
M.I. Stratan ◽  
S.A. Ibragimov ◽  
I.S. Glazkova ◽  
...  
Keyword(s):  
Ground State ◽  
One Dimensional ◽  
Spin Singlet ◽  
Quantum Ground State

SPIN STRUCTURES IN INHOMOGENEOUS FRACTIONAL QUANTUM HALL SYSTEMS

2004 ◽  
Vol 18 (27n29) ◽  
pp. 3871-3874 ◽  
Author(s):  
KAREL VÝBORNÝ ◽  
DANIELA PFANNKUCHE
Keyword(s):  
Ground State ◽  
Quantum Hall ◽  
Exact Diagonalization ◽  
Fractional Quantum ◽  
Fractional Quantum Hall ◽  
Spin Structures ◽  
Quantum Hall Systems ◽  
Magnetic Inhomogeneities ◽  
Spin Singlet ◽  
Spin Polarized

Transitions between spin polarized and spin singlet incompressible ground state of quantum Hall systems at filling factor 2/3 are studied by means of exact diagonalization with eight electrons. We observe a stable exactly half–polarized state becoming the absolute ground state around the transition point. This might be a candidate for the anomaly observed during the transition in optical experiments. The state reacts strongly to magnetic inhomogeneities but it prefers stripe–like spin structures to formation of domains.

Spin-singlet Quantum Ground State in Zigzag Spin Ladder Cu(CF3 COO)2

ChemPhysChem ◽  
2017 ◽  
Vol 18 (18) ◽  
pp. 2482-2486 ◽  
Author(s):  
Igor L. Danilovich ◽  
Elena V. Karpova ◽  
Igor V. Morozov ◽  
Alexey V. Ushakov ◽  
Sergey V. Streltsov ◽  
...  
Keyword(s):  
Ground State ◽  
Spin Ladder ◽  
Spin Singlet ◽  
Quantum Ground State

NON-LEPTONIC WEAK TRANSITIONS WITH ΔI = 1/2 RULE IN DIQUARK-QUARK MODEL USING THE PAULI-GÜRSEY SYMMETRY

1994 ◽  
Vol 09 (12) ◽  
pp. 1059-1069 ◽  
Author(s):  
K. SUZUKI ◽  
H. TOKI
Keyword(s):  
Quark Model ◽  
Ground State ◽  
Wave Functions ◽  
P Wave ◽  
Standard Process ◽  
Weak Process ◽  
Pion Emission ◽  
Spin Singlet ◽  
Weak Transitions

We study the non-leptonic weak transitions of ground state baryons in diquark-quark model. These weak transitions exhibit the ΔI = 1/2 rule, which is hard to account for in the standard weak process. If the diquark correlations are strong among flavor-antitriplet and spin-singlet pairs, we can make the weak transitions among diquarks followed by pion emission much stronger than the standard process. We estimate all the non-leptonic weak transitions of ground state baryons by assuming the Pauli-Gürsey symmetry together with the SU(6) wave functions. We can account for all the P-wave transition strengths quantitatively and hence the ΔI = 1/2 rule.

scholarly journals Evidence of spin singlet ground state in the frustrated antiferromagnetic ringCr8Ni

2009 ◽  
Vol 79 (13) ◽  
Author(s):  
Yuji Furukawa ◽  
Kazuki Kiuchi ◽  
Ken-ichi Kumagai ◽  
Yoshitami Ajiro ◽  
Yasuo Narumi ◽  
...  
Keyword(s):  
Ground State ◽  
Singlet Ground State ◽  
Spin Singlet

scholarly journals Crystal structure and magnetism in the S = 1/2 spin dimer compound NaCu2VP2O10

IUCrJ ◽  
2020 ◽  
Vol 7 (4) ◽  
pp. 656-662 ◽  
Author(s):  
Daisuke Urushihara ◽  
Sota Kawaguchi ◽  
Koichiro Fukuda ◽  
Toru Asaka
Keyword(s):  
Crystal Structure ◽  
Ground State ◽  
Layer Structure ◽  
Singlet Ground State ◽  
X Ray Diffraction ◽  
Magnetic Ground State ◽  
Teller Distortion ◽  
Spin Dimer ◽  
Spin Singlet ◽  
Jahn Teller

The crystal structure of the spin dimer magnet NaCu2VP2O10 was determined using single-crystal X-ray diffraction and electron diffraction. NaCu2VP2O10 displayed a non-centrosymmetric orthorhombic C2221 structure with a = 6.13860 (10) Å, b = 14.4846 (3) Å and c = 8.2392 (2) Å. The layered structure comprised CuO4 plaquettes, VO6 octahedra and PO4 tetrahedra. A pair of CuO4 plaquettes formed Cu2O6 structural dimers through edge sharing. The Cu–Cu network formed a distorted puckered-layer structure with pseudo-one-dimensional characteristics. Maximum magnetic susceptibility was observed at ∼60 K and NaCu2VP2O10 became non-magnetic upon further cooling. The spin gap between the spin-singlet non-magnetic ground state and triplet excited state was estimated to be 43.4 K. Thus, NaCu2VP2O10 was assumed to be an alternating chain system with a singlet ground state of dimer origin. The V5+ ions in the VO6 octahedra showed large off-centre displacements along the [110] direction in the primitive perovskite structure, which were attributed to the pseudo-Jahn–Teller distortion of d 0 transition metals.

NaKV4O9·2H2O: a new 2D magnetic compound with a 1/5-depleted square lattice

2016 ◽  
Vol 45 (12) ◽  
pp. 5234-5239 ◽  
Author(s):  
Meiyan Cui ◽  
Zhangzhen He ◽  
Nannan Wang ◽  
Yingying Tang ◽  
Wenbin Guo ◽  
...  
Keyword(s):  
Layered Structure ◽  
Ground State ◽  
Magnetic Measurements ◽  
Square Lattice ◽  
Singlet Ground State ◽  
Spin Gap ◽  
Spin Lattice ◽  
System P ◽  
Spin Singlet

A new vanadate compound NaKV4O9·2H2O shows a typical 2D layered structure with a quite interesting 1/5-depleted square spin-lattice. Magnetic measurements demonstrate a spin-singlet ground state with a spin-gap in the system.

Crystal structure and properties of phosphatePbCu2(PO4)2with spin-singlet ground state

2006 ◽  
Vol 73 (2) ◽  
Author(s):  
Alexei A. Belik ◽  
Masaki Azuma ◽  
Akira Matsuo ◽  
Tomoyuki Kaji ◽  
Susumu Okubo ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Ground State ◽  
Singlet Ground State ◽  
Structure And Properties ◽  
Spin Singlet
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