Spin-peierls transition
WebWe develop a new theory of the spin-Peierls transition in spin-\textonehalf{} Heisenberg chains, treating the phonons in a mean-field random-phase approximation (RPA) as in previous work, but calculating the relevant response functions of the spin system using the procedure of Luther and Peschel. We show that the RPA on the phonons (and therefore … WebAbstract. Exact diagonalizations are done to calculate the energy gain from bond alternation in finite spin chains as a function of chain length. Calculations are done for S=1/2, 1, 3/2, and 2. Qualitative differences are found between half-integer and interger spins. Our results (i) indicate the absence of the spin-Peierls transition in ...
Spin-peierls transition
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WebMagnetic-susceptibility and EPR measurements are reported which provide the first unambiguous evidence for a spin-Peierls transition in a system of linear one-dimensional antiferromagnetic Heisenberg chains. The material studied is TTFCu S 4 C 4 (C F 3) 4 (TFF stands for tetrathiafulvalinium). At 12 K, the spin-lattice system undergoes a second ... WebJun 7, 1993 · Observation of the spin-Peierls transition in linear Cu2+ (spin-1/2) chains in an inorganic compound CuGeO3. Observation of the spin-Peierls transition in linear Cu2+ (spin-1/2) chains in an inorganic compound CuGeO3 Phys Rev Lett. 1993 Jun 7;70(23):3651-3654. doi: 10.1103/PhysRevLett.70.3651. ...
WebAn experimental and theoretical study of the field dependence of the structural modulation in the incommensurate high field phase of the spin-Peierls cuprate ${\\mathrm{CuGeO}}_{3}$ is presented. The averaged structural order parameter is determined from magnetostriction and thermal expansion experiments in magnetic fields … WebThis communication reports the first spin-Peierls transition in metal complexes in which pure d electrons contribute to the magnetism. In addition, we demonstrated a new experimental method for studying a spin-Peierls system. *
http://web.mit.edu/ceder/publications/prb-67-02045-2003.pdf WebJun 19, 2002 · Heisenberg-chains which undergo a spin-Peierls transition. The energy scale is an order of magnitude. larger than that of previously known examples. The effects of non-magnetic Sc impurities are.
WebDec 28, 2009 · We study the spin-Peierls (SP) transition of one-dimensional chain polymeric complexes coupled to lattice by means of many-body Green's function theory. The chain …
WebMar 5, 2024 · The Peierls Transition: how Cooling a Conductor Can Give an Insulator. As mentioned in the Introduction, substances very close to monovalent one-dimensional … dpp jednatelWebApr 8, 2024 · Peierls transition is often used to explain charge density wave (CDW) based on the concept of Fermi surface nesting (FSN), although not all CDW originated from it. 2 FSN means that there exist... dppj 30/2020http://galileo.phys.virginia.edu/classes/752.mf1i.spring03/PeierlsTrans.htm radio bom jesus da lapaWebJan 21, 2014 · Synergistic Spin Transition between Spin Crossover and Spin‐Peierls‐like Singlet Formation in the Halogen‐Bonded Molecular Hybrid System: [Fe (Iqsal)2] [Ni … dp pistol\u0027sWebMar 1, 1987 · Spin-Peierls transition, where the lattice dimerizes due to its coupling to the spin system, is the result of particular quantum mechanical nature of quasi-one … dppj1052WebMay 4, 2024 · Spin-Peierls transition is associated with an intrinsic lattice instability in a system of quantum mechanical antiferromag-netic chains, where SZ1/2 spins interact with each other via a Heisenberg exchange interaction and are coupled to the lattice. From the experimental point of view, all the spin-Peierls radio bom jesusWebSpin Peierls transition (8). In such a theory the chains are thought to progressively tetramerize as the temperature is lowered, opening a BCS like gap (2A(T)) *) J is defined by the Hamiltonian II = 2J EiSiSi+ 1 . 47 in the magnetic excitation spectrum (9, 10). In this way an alternation of the exchange isobtained: J(T) = J (I + ~ (T~ and we ... dpp jamaica