作者: Chauvinistic 時間: 2025-3-22 18:27
作者: ICLE 時間: 2025-3-23 00:42
K. Kopinga,W. J. M. de Jonge,C. H. W. Swüste,A. C. Phaff,R. Hoogerbeets,A. J. van Duyneveldthe Labour Group and the Council in 1980, before which, he chaired the Family and Social Services Committee. He also chairs the Association of Metropolitan Authorities Social Services Committee. In 1978, he failed to secure the Labour nomination as parliamentary candidate for the City’s Penistone con
作者: RACE 時間: 2025-3-23 02:39
作者: quiet-sleep 時間: 2025-3-23 09:08
Jill C. Bonner,John B. Parkinsonhe extension of PDF techniques to include . PDF techniques. We are hopeful that isotopic substitution neutron scattering or near-resonant x-ray diffraction will become just as useful a technique as the PDF technique has been and that it will help elucidate the local structure where interfering bonds
作者: 昏迷狀態(tài) 時間: 2025-3-23 11:51
R. W. Gerling,D. P. Landauhe extension of PDF techniques to include . PDF techniques. We are hopeful that isotopic substitution neutron scattering or near-resonant x-ray diffraction will become just as useful a technique as the PDF technique has been and that it will help elucidate the local structure where interfering bonds
作者: Emg827 時間: 2025-3-23 15:24
G. P. Meech,S. W. Loveseyhe extension of PDF techniques to include . PDF techniques. We are hopeful that isotopic substitution neutron scattering or near-resonant x-ray diffraction will become just as useful a technique as the PDF technique has been and that it will help elucidate the local structure where interfering bonds
作者: 強化 時間: 2025-3-23 19:14
作者: Tonometry 時間: 2025-3-24 01:26
G. Reiteributions to the entropies of solid phases. Phonon DOS measurements at different temperatures will provide information about these anharmonic contributions, which have been shown to be important for the hP24 phase of Co. V..The hope is that there will emerge, at least for specific classes of material
作者: 軟膏 時間: 2025-3-24 05:44
he extension of PDF techniques to include . PDF techniques. We are hopeful that isotopic substitution neutron scattering or near-resonant x-ray diffraction will become just as useful a technique as the PDF technique has been and that it will help elucidate the local structure where interfering bonds
作者: 感染 時間: 2025-3-24 10:07
R. K. Bullough,D. J. Pilling,J. Timonen most challenging problems in the study of structure is to characterize the atomic short-range order in materials. Long-range order can be determined with a high degree of accuracy by analyzing Bragg peak positions and intensities in data from single crystals or powders. However, information about s
作者: debacle 時間: 2025-3-24 11:08
Stephen W. Lovesey,Umberto Balucani,Valerio Tognet
作者: 難取悅 時間: 2025-3-24 16:37
作者: 可商量 時間: 2025-3-24 20:23
作者: Defraud 時間: 2025-3-25 00:44
作者: Misnomer 時間: 2025-3-25 04:55
作者: 投票 時間: 2025-3-25 09:09
Spin Waves in a One-Dimensional Antiferromagnetic InsulatorEffectively one-dimensional magnetic materials do exist in nature with magnetic interactions that can be well characterized [1]. The pathological nature taken on by fluctuations under these conditions prevents the appearance of a state with long range order although there is extensive short range order at low temperatures.
作者: unstable-angina 時間: 2025-3-25 12:55
作者: 易受騙 時間: 2025-3-25 16:48
Spin Wave Theory for the Classical Easy Plane Ferromagnet in Zero Field: Exact Results at Low Tempercal response function. asymptotically exactly, for all wavevectors, as T → 0. The method used is an extension of that used to treat the fully isotropic system [1]. The response function can be written as [2] ..
作者: 聾子 時間: 2025-3-25 21:55
Nonlinear Excitations in the Classical ,-ModelIt has been known For some time [1–4] that the classical XY-model in one and two dimensions shows behavior which is governed by nonlinear excitations.
作者: 座右銘 時間: 2025-3-26 03:47
作者: 一美元 時間: 2025-3-26 07:39
Springer Series in Solid-State Scienceshttp://image.papertrans.cn/m/image/621222.jpg
作者: 繁榮中國 時間: 2025-3-26 09:21
作者: FOLLY 時間: 2025-3-26 15:18
Narrow and Broad Solitons in the Antiferromagnetic Chains of CsCoCl3 and TMMC have antiferromagnetic (AF) couplings in the chains and at low temperature they exhibit an Ising symmetry favourable for the occurrence of solitons. This symmetry is an intrinsic property of CsCoCl. while in TMMC it is achieved only by the application of an external magnetic field H perpendicular t
作者: adduction 時間: 2025-3-26 18:10
作者: 啟發(fā) 時間: 2025-3-26 23:15
Solitons in a , (,=1/2) Quantum Systemy discovered system (C.H.NH.)CuBr.. We have measured the excess specific heat △C, the nuclear spin-lattice relaxation (NSLR) time T. in the field range 0 < B < 7 k0e and the temperature range 1.5 K < T < 10 K, although some data are also obtained outside this region. These data will show that both t
作者: opportune 時間: 2025-3-27 04:28
作者: diathermy 時間: 2025-3-27 08:26
作者: faculty 時間: 2025-3-27 11:06
作者: Console 時間: 2025-3-27 17:24
作者: flex336 時間: 2025-3-27 20:31
作者: 錯誤 時間: 2025-3-27 23:51
The Life Time of the Spin Waves of a Classical Ferromagnetic Chain in an Applied Magnetic Fieldtion often requires the use of non-perturbative approaches [1], [2].The concept of non-linear excitations (solitons) was also sometimes invoked [3].However,when the ordering effect of`the magnetic field overcomes the thermally induced disorder, the spin -wave approach can be successfully used and th
作者: 尋找 時間: 2025-3-28 05:15
Quantum Spin Chains: Phase Behaviour and Dynamic Excitationseresting conjecture of HALDANE [1]. According to Haldane, half-integer spin chains should behave like the exactly solvable spin-1/2 XXZ model, with a gapless phase for planar anisotropy terminating at an essential singularity at the Heisenberg point, and a phase with long-range order in the ground s
作者: 易改變 時間: 2025-3-28 08:48
Field Dependent Spin Dynamics of Antiferromagnetic Heisenberg Chainses. These techniques include soliton theories in the presence of weak magnetic fields [1], perturbative studies of a generalized Langevin equation for intermediate and large fields [2, 3] and computer simulations [4]. Here we calculate, using a new mode-coupling theory, the response function measure
作者: 有罪 時間: 2025-3-28 11:47
Is CsNiF3 a Classical System?oximated (in the continuum limit and for D→∞) by the sine-Gordon (SG) model[1]. However, much experimental data [2] on CsNiF., a compound well described by (1), addressed to estimating the contribution of non-linear modes to the thermodynamic and scattering properties,have not received a consistent
作者: Synovial-Fluid 時間: 2025-3-28 17:39
Spin Wave Theory for the Classical Easy Plane Ferromagnet in Zero Field: Exact Results at Low Tempercal response function. asymptotically exactly, for all wavevectors, as T → 0. The method used is an extension of that used to treat the fully isotropic system [1]. The response function can be written as [2] ..
作者: aptitude 時間: 2025-3-28 21:47
H. J. M. de Groot,R. C. Thiel,L. J. de Jonghwn as V., is used as a common design parameter. Ambient noise data that is generated by ground vibrations due to the passing of vehicles or other passive sources carry an important information about the subsurface shear wave velocity structure of the region. The seismic instrument records these dist
作者: AGOG 時間: 2025-3-29 00:27
K. Kopinga,W. J. M. de Jonge,C. H. W. Swüste,A. C. Phaff,R. Hoogerbeets,A. J. van Duyneveldtrth, he attended a special boarding school near Shrewsbury between the ages of four and sixteen, but has lived in Sheffield since then. He took a commercial course, learned shorthand and typing and had a clerical job in the gas industry for two years. He passed O and A levels through day-release and
作者: 檢查 時間: 2025-3-29 05:49
作者: 束縛 時間: 2025-3-29 11:17
Jill C. Bonner,John B. Parkinson the electronic oxides. Although we are still actively continuing our study of these systems, we are also beginning to broaden the scope of our work and apply these techniques to the study of other classes of materials. We have been very interested in using local structural techniques to study possi
作者: CRANK 時間: 2025-3-29 12:00
R. W. Gerling,D. P. Landau the electronic oxides. Although we are still actively continuing our study of these systems, we are also beginning to broaden the scope of our work and apply these techniques to the study of other classes of materials. We have been very interested in using local structural techniques to study possi
作者: Congestion 時間: 2025-3-29 15:40
作者: Harridan 時間: 2025-3-29 20:42
M. G. Pini,A. Rettoriiples are known, the individual phenomena that contribute to differences in vibrational entropy of solid phases require much more investigation..We do not expect all of the vibrational modes in a solid to have the same dependence on local atomic structure. In ordered and disordered transition metal
作者: decode 時間: 2025-3-30 01:41
G. Reiteriples are known, the individual phenomena that contribute to differences in vibrational entropy of solid phases require much more investigation..We do not expect all of the vibrational modes in a solid to have the same dependence on local atomic structure. In ordered and disordered transition metal
作者: 不要嚴酷 時間: 2025-3-30 04:31
作者: 核心 時間: 2025-3-30 12:12
R. K. Bullough,D. J. Pilling,J. Timonenbroad range of topics from small clusters of atoms to engineering materials and involve chemistry, physics, materials science and engineering, with length scales ranging from ?ngstroms up to millimeters. The emphasis is on basic science rather than on applications. Each book focuses on a single area
作者: 流利圓滑 時間: 2025-3-30 12:39
Specific Heat of TMMC due to Non-Linear Excitations: Comparison with Classical Modelscompletely satisfactory to explain the experimental results[5]. Following the original suggestion by Mikeska[6], TMMC should be mapped by a sine-Gordon, classical chain for external magnetic fields perpendicular to the chain axis of magnitude less than about 5 Tesla.
作者: 修飾 時間: 2025-3-30 18:21
作者: 無節(jié)奏 時間: 2025-3-30 21:54
Quantum Spin Chains: Phase Behaviour and Dynamic Excitationsntly referred to as the “Heisenberg phase”) with a non-ordered ground state together with an excitation energy gap, which encompasses the Heisenberg point. This behavior is shown schematically in Fig. 1, where the parameters are defined through the XXZ AFM Hamiltonian:..
作者: 輕快帶來危險 時間: 2025-3-31 02:31
Solitons in a , (,=1/2) Quantum Systemhe dynamic behavior of the electronspin system, as monitored by T., and an equilibrium property like C can be understood by adopting solitons as dominant excitations in an appropriate temperature and field regime. Parts of these results have been published recently [1].
作者: CT-angiography 時間: 2025-3-31 08:11
=0 Excitations in the Quantum Chain Systems (C,H,NH,)CuCl, and (C,H,NH,)CuBr, whereas in the classical limit these systems show a rich variety of non-linear phenomena, including soliton-like excitations [6]. The lower energy levels of the S=1/2 XYZ system in zero field have been obtained rigorously by mapping onto an eight-vertex model [7].
作者: affect 時間: 2025-3-31 12:14
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