Results 101 to 110 of about 430,460 (294)

Density Matrix Renormalization Group Applied to the Ground State of the XY-Spin-Peierls System

, 1996
We use the density matrix renormalization group (DMRG) to map out the ground state of a XY-spin chain coupled to dispersionless phonons of frequency $% \omega $. We confirm the existence of a critical spin-phonon coupling $% \alpha _c\propto \omega ^{0.7}
B. Dumoulin, C. Bourbonnais, C. Bourbonnais, C. Q. Wu, E. Fradkin, E. R. Davidson, F. Marsiglio, G. C. Psaltakis, H. R. McKenzie, J. E. Hirsch, J. L. Black, J. P. Pouget, J. Voit, J. W. Bray, L. Ducasse, L. G. Caron, L. G. Caron, L. G. Caron, L. Liu, M. P. M. den Nijs, R. J. Baxter, S. Moukouri, S. R. White   +22 more
core   +2 more sources

Copper Nanocrystallization in Anodic Oxide Films of Ti–Cu‐Based Bulk Metallic Glass and Its Effect on the Corrosion Resistance and Cytocompatibility

Advanced Engineering Materials, EarlyView.
Viktoriia Shtefan, Thorgund Nemec, Ute Hempel, Annett Gebert and coworkers demonstrate that anodic treatment of Ti–Cu‐based metallic glass in a nontoxic pyrophosphate electrolyte forms a protective bilayered Ti/Zr‐oxide film enriched with Cu nanocrystals.
Viktoriia Shtefan, Nora Fernández Navas, Thorgund Nemec, Ivan Kaban, Ute Hempel, Andrea Voss, Volker Hoffmann, Darius Pohl, Annett Gebert   +8 more
wiley   +1 more source

Grassmann techniques applied to classical spin systems

Condensed Matter Physics, 2009
We review problems involving the use of Grassmann techniques in the field of classical spin systems in two dimensions. These techniques are useful to perform exact correspondences between classical spin Hamiltonians and field-theory fermionic actions ...
M. Clusel, J.-Y. Fortin
doaj   +1 more source

Quantum relativistic Toda chain at root of unity: isospectrality, modified Q-operator, and functional Bethe ansatz

International Journal of Mathematics and Mathematical Sciences, 2002
We investigate an N-state spin model called quantum relativistic Toda chain and based on the unitary finite-dimensional representations of the Weyl algebra with q being Nth primitive root of unity. Parameters of the finite-dimensional representation of
Stanislav Pakuliak, Sergei Sergeev
doaj   +1 more source

Modulating Two‐Photon Absorption in a Pyrene‐Based MOF Series: An In‐Depth Investigation of Structure–Property Relationships

Advanced Functional Materials, EarlyView.
This study investigates H4TBAPy‐based metal–organic frameworks (MOFs) ‐ NU‐1000, NU‐901, SrTBAPy, and BaTBAPy ‐ for multiphoton absorption (MPA) performance. It observes topology‐dependent variations in the 2PA cross‐section, with BaTBAPy exhibiting the highest activity.
Simon N. Deger, Helmy Pacheco Hernandez, Yang Cui, Hongxing Hao, Vanessa Ramm, David C. Mayer, Khai‐Nghi Truong, Roland A. Fischer, Jürgen Hauer, Mariana Kozlowska, Alexander Pöthig   +10 more
wiley   +1 more source

Monte Carlo Study of Correlations in Quantum Spin Chains at Non-Zero Temperature

, 1998
Antiferromagnetic Heisenberg spin chains with various spin values ($S=1/2,1,3/2,2,5/2$) are studied numerically with the quantum Monte Carlo method. Effective spin $S$ chains are realized by ferromagnetically coupling $n=2S$ antiferromagnetic spin chains
Birgeneau, R. J., Greven, M., Kim, Y. J., Wiese, U. -J.   +3 more
core   +1 more source

Spin and statistics in classical mechanics [PDF]

American Journal of Physics, 2004
The spin–statistics connection is obtained for classical particles. The connection holds within pseudomechanics, a theory of particle motion that extends classical physics to include anticommuting Grassmann variables, and that exhibits classical analogs of both spin and statistics.
openaire   +2 more sources

Electroactive Metal–Organic Frameworks for Electrocatalysis

Advanced Functional Materials, EarlyView.
Electrocatalysis is crucial in sustainable energy conversion as it enables efficient chemical transformations. The review discusses how metal–organic frameworks can revolutionize this field by offering tailorable structures and active site tunability, enabling efficient and selective electrocatalytic processes.
Irena Senkovska, Yutong Luo, Ruyan Zhao, Jianjun Zhang, Mingchao Wang, Xinliang Feng, Eike Brunner, Stefan Kaskel   +7 more
wiley   +1 more source

Magnetic boson peak in classical spin glasses

Physical Review Research
We revisited spin dynamics in archetypical classical spin-glass (SG) systems, such as Cu_{1−x}Mn_{x} (x=0.017, 0.034, and 0.067) dilute alloys and iron aluminosilicate glass, using a modern neutron scattering spectrometer with high neutron flux.
Maiko Kofu, Seiko Ohira-Kawamura, Naoki Murai, Rieko Ishii, Daigorou Hirai, Hiroshi Arima, Kenichi Funakoshi   +6 more
doaj   +1 more source

Quantum mechanical calculation of electron spin

Open Physics, 2017
The classical and quantum mechanical methods are used respectively to calculate the electron spin. It is shown that the classical method cannot derive the correct magnetic moment value.
Zhao Hai-Long
doaj   +1 more source