Second-order Peierls transition in the spin-orbital Kumar-Heisenberg model
نویسندگان
چکیده
منابع مشابه
First and second order transition of frustrated Heisenberg spin systems
Starting from the hypothesis of a second order transition we have studied modifications of the original Heisenberg antiferromagnet on a stacked triangular lattice (STA–model) by the Monte Carlo technique. The change is a local constraint restricting the spins at the corners of selected triangles to add up to zero without stopping them from moving freely (STAR–model). We have studied also the cl...
متن کاملSpin-Peierls transition in TiPO4
The complex interplay between charge, orbital, spin and lattice degrees of freedom in low-dimensional systems with pronounced quantum fluctuations allows for a plethora of complex and unusual ground states. Most of the prominent examples of low-dimensional quantum antiferromagnets with exotic ground states contain Cu (3d, S = 1/2) ions with one hole present in the eg orbitals. Compounds of earl...
متن کاملSpin, Orbital, and Spin-Orbital Polarons in Transition Metal Oxides
I give a brief overview of a polaron formation in three distinct transition metal oxides: (i) spin polaron when a hole is added to the antiferromagnetic (AF) ordered plane in La2CuO4, (ii) orbital polaron when a hole is added to the alternating orbital (AO) ordered plane in LaMnO3, and (iii) spin-orbital polaron when a hole is added to the AF and AO ordered plane in LaVO3. Comparison of the dis...
متن کاملThe spin-1/2 Heisenberg chain: thermodynamics, quantum criticality and spin-Peierls exponents
We present numerical and analytical results for the thermodynamical properties of the spin-1/2 Heisenberg chain at arbitrary external magnetic field. Special emphasis is placed on logarithmic corrections in the susceptibility and specific heat at very low temperatures (T/J = 10) and small fields. A longstanding controversy about the specific heat is resolved. At zero temperature the spin-Peierl...
متن کاملPhase Diagram of a Heisenberg Spin-Peierls Model with Quantum Phonons
Using a new version of the density-matrix renormalization group we determine the phase diagram of a model of an antiferromagnetic Heisenberg spin chain where the spins interact with quantum phonons. A quantum phase transition from a gapless spin-fluid state to a gapped dimerized phase occurs at a nonzero value of the spin-phonon coupling. The transition is in the same universality class as that...
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: 2015
ISSN: 1098-0121,1550-235X
DOI: 10.1103/physrevb.91.205137