1,653 research outputs found
An quantum approach of measurement based on the Zurek's triple model
In a close form without referring the time-dependent Hamiltonian to the total
system, a consistent approach for quantum measurement is proposed based on
Zurek's triple model of quantum decoherence [W.Zurek, Phys. Rev. D 24, 1516
(1981)]. An exactly-solvable model based on the intracavity system is dealt
with in details to demonstrate the central idea in our approach: by peeling off
one collective variable of the measuring apparatus from its many degrees of
freedom, as the pointer of the apparatus, the collective variable de-couples
with the internal environment formed by the effective internal variables, but
still interacts with the measured system to form a triple entanglement among
the measured system, the pointer and the internal environment. As another
mechanism to cause decoherence, the uncertainty of relative phase and its
many-particle amplification can be summed up to an ideal entanglement or an
Shmidt decomposition with respect to the preferred basis.Comment: 22pages,3figure
High order quantum decoherence via multi-particle amplitude for boson system
In this paper we depict the high order quantum coherence of a boson system by
using the multi-particle wave amplitude, whose norm square is just the high
order correlation function. This multi-time amplitude can be shown to be a
superposition of several "multi-particle paths". When the environment or a
apparatus entangles with them to form a generalized "which-way" measurement for
many particle system, the quantum decoherence happens in the high order case
dynamically. An explicit illustration is also given with an intracavity system
of two modes interacting with a moving mirror.Comment: 7 pages, revtex, 4 eps figure
Surgical excision promotes tumor growth and metastasis by promoting expression of MMP-9 and VEGF in a breast cancer model
Surgery is still the main curative therapeutic modality for breast cancer. Although surgery often results in the successful removal of the primary tumor, its process could increase the risk of metastases of residual cancer cells. Understanding of the connection between breast cancer metastasis and surgical wound will lead to the establishment of a proper treatment strategy for postoperative cancer patient. Aim: To study the influence of surgical procedure on the metastasis of primary breast cancer. Methods: We established MDA-MB-435 human breast cancer xenograft model. Levels of Pro-matrix metalloproteinase 9 (Pro-MMP-9) and vascular endothelial growth factor (VEGF) in host serum and tumors were tested at different time points with ELISA and zymography and correlated to tumor growth and postoperative metastasis. Results: Our study demonstrated surgical wound had promoting effect on tumor growth and pulmonary metastasis of human breast cells, if tumor cells remain in bodies. This effect might be related to the postoperative interaction of cancer and host cells, which resulted in expression of Pro-MMP-9. Surgical process could also increase the VEGF expression in tumor tissues. Conclusions: Surgical wound-produced host Pro-MMP-9 and tumor cell VEGF might be important mediators leading to metastasis of residual breast cancer after surgery.Π₯ΠΈΡΡΡΠ³ΠΈΡΠ΅ΡΠΊΠΎΠ΅ Π»Π΅ΡΠ΅Π½ΠΈΠ΅ Π΄ΠΎ ΡΠΈΡ
ΠΏΠΎΡ ΠΎΡΡΠ°Π΅ΡΡΡ Π³Π»Π°Π²Π½ΡΠΌ ΡΠ΅ΡΠ°ΠΏΠ΅Π²ΡΠΈΡΠ΅ΡΠΊΠΈΠΌ ΠΏΠΎΠ΄Ρ
ΠΎΠ΄ΠΎΠΌ ΠΏΡΠΈ Π»Π΅ΡΠ΅Π½ΠΈΠΈ Π±ΠΎΠ»ΡΠ½ΡΡ
ΡΠ°ΠΊΠΎΠΌ ΠΌΠΎΠ»ΠΎΡΠ½ΠΎΠΉ
ΠΆΠ΅Π»Π΅Π·Ρ. Π₯ΠΎΡΡ Ρ
ΠΈΡΡΡΠ³ΠΈΡΠ΅ΡΠΊΠΎΠ΅ ΡΠ΄Π°Π»Π΅Π½ΠΈΠ΅ ΠΎΠΏΡΡ
ΠΎΠ»ΠΈ Π² Π±ΠΎΠ»ΡΡΠΈΠ½ΡΡΠ²Π΅ ΡΠ»ΡΡΠ°Π΅Π² Π΄ΠΎΡΡΠ°ΡΠΎΡΠ½ΠΎ ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎ, Π² ΡΠΎ ΠΆΠ΅ Π²ΡΠ΅ΠΌΡ ΠΎΠ½ΠΎ ΠΌΠΎΠΆΠ΅Ρ
ΡΠ²Π΅Π»ΠΈΡΠΈΡΡ ΡΠΈΡΠΊ ΠΌΠ΅ΡΠ°ΡΡΠ°Π·ΠΈΡΠΎΠ²Π°Π½ΠΈΡ ΠΎΡΡΠ°ΡΠΎΡΠ½ΡΡ
ΠΎΠΏΡΡ
ΠΎΠ»Π΅Π²ΡΡ
ΠΊΠ»Π΅ΡΠΎΠΊ. ΠΠΎΠ½ΠΈΠΌΠ°Π½ΠΈΠ΅ ΡΠ²ΡΠ·ΠΈ ΠΌΠ΅ΠΆΠ΄Ρ ΠΌΠ΅ΡΠ°ΡΡΠ°Π·ΠΈΡΠΎΠ²Π°Π½ΠΈΠ΅ΠΌ ΠΏΡΠΈ ΡΠ°ΠΊΠ΅
ΠΌΠΎΠ»ΠΎΡΠ½ΠΎΠΉ ΠΆΠ΅Π»Π΅Π·Ρ ΠΈ ΠΎΠΏΠ΅ΡΠ°ΡΠΈΠΎΠ½Π½ΠΎΠΉ ΡΠ°Π½ΠΎΠΉ ΠΏΠΎΠ·Π²ΠΎΠ»ΠΈΡ Π²ΡΠ±ΡΠ°ΡΡ Π½Π°ΠΈΠ»ΡΡΡΡΡ ΡΡΡΠ°ΡΠ΅Π³ΠΈΡ ΠΏΠΎΡΡΠΎΠΏΠ΅ΡΠ°ΡΠΈΠΎΠ½Π½ΠΎΠ³ΠΎ Π»Π΅ΡΠ΅Π½ΠΈΡ. Π¦Π΅Π»Ρ:
ΠΎΠΏΡΠ΅Π΄Π΅Π»ΠΈΡΡ Π²Π»ΠΈΡΠ½ΠΈΠ΅ Ρ
ΠΈΡΡΡΠ³ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ Π²ΠΌΠ΅ΡΠ°ΡΠ΅Π»ΡΡΡΠ²Π° Π½Π° ΠΌΠ΅ΡΠ°ΡΡΠ°Π·ΠΈΡΠΎΠ²Π°Π½ΠΈΠ΅ ΠΎΠΏΡΡ
ΠΎΠ»ΠΈ. ΠΠ΅ΡΠΎΠ΄Ρ: Π±ΡΠ»Π° ΡΠΎΠ·Π΄Π°Π½Π° ΠΌΠΎΠ΄Π΅Π»Ρ ΡΠ°ΠΊΠ°
ΠΌΠΎΠ»ΠΎΡΠ½ΠΎΠΉ ΠΆΠ΅Π»Π΅Π·Ρ ΡΠ΅Π»ΠΎΠ²Π΅ΠΊΠ° Π² Π²ΠΈΠ΄Π΅ ΠΊΡΠ΅Π½ΠΎΡΡΠ°Π½ΡΠΏΠ»Π°Π½ΡΠ°ΡΠ° MDA-MB-435. Π£ΡΠΎΠ²Π΅Π½Ρ Pro-ΠΌΠ°ΡΡΠΈΡΠ½ΠΎΠΉ ΠΌΠ΅ΡΠ°Π»Π»ΠΎΠΏΡΠΎΡΠ΅ΠΈΠ½Π°Π·Ρ 9
(Pro-MMP-9) ΠΈ ΡΠ°ΠΊΡΠΎΡΠ° ΡΠΎΡΡΠ° ΡΠ½Π΄ΠΎΡΠ΅Π»ΠΈΡ ΡΠΎΡΡΠ΄ΠΎΠ² (VEGF) Π² ΡΡΠ²ΠΎΡΠΎΡΠΊΠ΅ ΡΠ΅ΡΠΈΠΏΠΈΠ΅Π½ΡΠ° ΠΈ ΠΎΠΏΡΡ
ΠΎΠ»ΡΡ
ΠΎΡΠ΅Π½ΠΈΠ²Π°Π»ΠΈΡΡ Π² ΡΠ°Π·Π½ΡΠ΅
Π²ΡΠ΅ΠΌΠ΅Π½Π½ΡΠ΅ ΠΏΡΠΎΠΌΠ΅ΠΆΡΡΠΊΠΈ ΠΌΠ΅ΡΠΎΠ΄ΠΎΠΌ ELISA ΠΈ Π·ΠΈΠΌΠΎΠ³ΡΠ°ΡΠΈΠΈ. ΠΡΠΈ ΡΡΠΎΠΌ ΠΎΠΏΡΠ΅Π΄Π΅Π»ΡΠ»ΠΈ Π½Π°Π»ΠΈΡΠΈΠ΅ ΠΊΠΎΡΠ΅Π»Π»ΡΡΠΈΠΈ ΠΌΠ΅ΠΆΠ΄Ρ ΡΡΠΈΠΌΠΈ ΠΏΠΎΠΊΠ°Π·Π°- ΠΈ Π·ΠΈΠΌΠΎΠ³ΡΠ°ΡΠΈΠΈ. ΠΡΠΈ ΡΡΠΎΠΌ ΠΎΠΏΡΠ΅Π΄Π΅Π»ΡΠ»ΠΈ Π½Π°Π»ΠΈΡΠΈΠ΅ ΠΊΠΎΡΠ΅Π»Π»ΡΡΠΈΠΈ ΠΌΠ΅ΠΆΠ΄Ρ ΡΡΠΈΠΌΠΈ ΠΏΠΎΠΊΠ°Π·Π° ΠΈ Π·ΠΈΠΌΠΎΠ³ΡΠ°ΡΠΈΠΈ. ΠΡΠΈ ΡΡΠΎΠΌ ΠΎΠΏΡΠ΅Π΄Π΅Π»ΡΠ»ΠΈ Π½Π°Π»ΠΈΡΠΈΠ΅ ΠΊΠΎΡΠ΅Π»Π»ΡΡΠΈΠΈ ΠΌΠ΅ΠΆΠ΄Ρ ΡΡΠΈΠΌΠΈ ΠΏΠΎΠΊΠ°Π·Π°ΡΠ΅Π»ΡΠΌΠΈ,
ΡΠΎΡΡΠΎΠΌ ΠΎΠΏΡΡ
ΠΎΠ»ΠΈ ΠΈ ΠΏΠΎΡΡΠΎΠΏΠ΅ΡΠ°ΡΠΈΠΎΠ½Π½ΡΠΌΠΈ ΠΌΠ΅ΡΠ°ΡΡΠ°Π·Π°ΠΌΠΈ. Π Π΅Π·ΡΠ»ΡΡΠ°ΡΡ: Π±ΡΠ»ΠΎ ΠΏΠΎΠΊΠ°Π·Π°Π½ΠΎ, ΡΡΠΎ ΠΎΠΏΠ΅ΡΠ°ΡΠΈΠΎΠ½Π½Π°Ρ ΡΠ°Π½Π° ΡΠΏΠΎΡΠΎΠ±ΡΡΠ²ΡΠ΅Ρ
ΡΠΎΡΡΡ ΠΎΠΏΡΡ
ΠΎΠ»ΠΈ ΠΌΠΎΠ»ΠΎΡΠ½ΠΎΠΉ ΠΆΠ΅Π»Π΅Π·Ρ ΠΈ Π΅Π΅ ΠΌΠ΅ΡΠ°ΡΡΠ°Π·ΠΈΡΠΎΠ²Π°Π½ΠΈΡ Π² Π»Π΅Π³ΠΊΠΈΠ΅ Π² ΡΠ»ΡΡΠ°Π΅, ΠΊΠΎΠ³Π΄Π° ΠΏΡΠΈ ΡΠ΄Π°Π»Π΅Π½ΠΈΠΈ ΠΎΠΏΡΡ
ΠΎΠ»ΠΈ Π² ΡΠ°Π½Π΅
ΠΎΡΡΠ°ΡΡΡΡ ΠΎΠΏΡΡ
ΠΎΠ»Π΅Π²ΡΠ΅ ΠΊΠ»Π΅ΡΠΊΠΈ. ΠΡΠΎ ΠΌΠΎΠΆΠ΅Ρ Π±ΡΡΡ ΡΠ²ΡΠ·Π°Π½ΠΎ Ρ ΠΏΠΎΡΡΠΎΠΏΠ΅ΡΠ°ΡΠΈΠΎΠ½Π½ΡΠΌ Π²Π·Π°ΠΈΠΌΠΎΠ΄Π΅ΠΉΡΡΠ²ΠΈΠ΅ΠΌ ΠΎΠΏΡΡ
ΠΎΠ»Π΅Π²ΡΡ
ΠΈ ΠΎΠΊΡΡΠΆΠ°ΡΡΠΈΡ
ΠΈΡ
Π½ΠΎΡΠΌΠ°Π»ΡΠ½ΡΡ
ΠΊΠ»Π΅ΡΠΎΠΊ, ΠΊΠΎΡΠΎΡΠΎΠ΅ ΠΏΡΠΈΠ²ΠΎΠ΄ΠΈΡ ΠΊ ΡΠΊΡΠΏΡΠ΅ΡΡΠΈΠΈ Pro-MMP-9. Π£Π΄Π°Π»Π΅Π½ΠΈΠ΅ ΠΎΠΏΡΡ
ΠΎΠ»ΠΈ ΠΌΠΎΠΆΠ΅Ρ ΡΠ°ΠΊΠΆΠ΅ ΡΠΏΠΎΡΠΎΠ±ΡΡΠ²ΠΎΠ²Π°ΡΡ
ΡΠ²Π΅Π»ΠΈΡΠ΅Π½ΠΈΡ ΡΠΊΡΠΏΡΠ΅ΡΡΠΈΠΈ VEGF ΠΎΠΏΡΡ
ΠΎΠ»Π΅Π²ΡΠΌΠΈ ΠΊΠ»Π΅ΡΠΊΠ°ΠΌΠΈ. ΠΡΠ²ΠΎΠ΄Ρ: Pro-MMP-9, ΡΠΊΡΠΏΡΠ΅ΡΡΠΈΡΡΠ΅ΠΌΡΠΉ Π½ΠΎΡΠΌΠ°Π»ΡΠ½ΡΠΌΠΈ ΠΊΠ»Π΅ΡΠΊΠ°ΠΌΠΈ,
ΠΎΠΊΡΡΠΆΠ°ΡΡΠΈΠΌΠΈ ΠΏΠΎΡΡΠΎΠΏΠ΅ΡΠ°ΡΠΈΠΎΠ½Π½ΡΡ ΡΠ°Π½Ρ, Π° ΡΠ°ΠΊΠΆΠ΅ VEGF, ΠΏΡΠΎΠ΄ΡΡΠΈΡΡΠ΅ΠΌΡΠΉ ΠΎΠΏΡΡ
ΠΎΠ»Π΅Π²ΡΠΌΠΈ ΠΊΠ»Π΅ΡΠΊΠ°ΠΌΠΈ, ΠΌΠΎΠ³ΡΡ Π±ΡΡΡ Π²Π°ΠΆΠ½ΡΠΌΠΈ
ΠΌΠ΅Π΄ΠΈΠ°ΡΠΎΡΠ°ΠΌΠΈ ΠΌΠ΅ΡΠ°ΡΡΠ°Π·ΠΈΡΠΎΠ²Π°Π½ΠΈΡ ΠΎΡΡΠ°ΡΠΎΡΠ½ΡΡ
ΠΎΠΏΡΡ
ΠΎΠ»Π΅Π²ΡΡ
ΠΊΠ»Π΅ΡΠΎΠΊ ΠΏΠΎΡΠ»Π΅ Ρ
ΠΈΡΡΡΠ³ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ Π²ΠΌΠ΅ΡΠ°ΡΠ΅Π»ΡΡΡΠ²Π°
A REAL TIME MONITORING MODEL OF THE CALCIUM CARBONATE FOULING INDUCTION PERIOD BASED ON THE CONDUCTANCE TITRATION
A new method has been developed to monitor the calcium carbonate fouling induction period (CCFIP) in real time. Based on the conductance titration, this paper investigated the forming process of CCFIP by a staticdynamic combined simulation experiment unit. With the help of titration analysis (that is titrimetry), an accurate definition of CCFIP and the corresponding real time monitoring model were built up. The investigation results show that the proposed model applies not only to measure the CCFIP in real time, but also applies to an investigation of the influence of various factors on the CCFIP
Superconductivity and single crystal growth of Ni0:05TaS2
Superconductivity was discovered in a Ni0:05TaS2 single crystal. A Ni0:05TaS2
single crystal was successfully grown via the NaCl/KCl flux method. The
obtained lattice constant c of Ni0:05TaS2 is 1.1999 nm, which is significantly
smaller than that of 2H-TaS2 (1.208 nm). Electrical resistivity and
magnetization measurements reveal that the superconductivity transition
temperature of Ni0:05TaS2 is enhanced from 0.8 K (2H-TaS2) to 3.9 K. The
charge-density-wave transition of the matrix compound 2H-TaS2 is suppressed in
Ni0:05TaS2. The success of Ni0:05TaS2 single crystal growth via a NaCl/KCl flux
demonstrates that NaCl/KCl flux method will be a feasible method for single
crystal growth of the layered transition metal dichalcogenides.Comment: 13pages, 6 figures, Published in SS
Comparison of s- and d-wave gap symmetry in nonequilibrium superconductivity
Recent application of ultrafast pump/probe optical techniques to
superconductors has renewed interest in nonequilibrium superconductivity and
the predictions that would be available for novel superconductors, such as the
high-Tc cuprates. We have reexamined two of the classical models which have
been used in the past to interpret nonequilibrium experiments with some
success: the mu* model of Owen and Scalapino and the T* model of Parker.
Predictions depend on pairing symmetry. For instance, the gap suppression due
to excess quasiparticle density n in the mu* model, varies as n^{3/2} in d-wave
as opposed to n for s-wave. Finally, we consider these models in the context of
S-I-N tunneling and optical excitation experiments. While we confirm that
recent pump/probe experiments in YBCO, as presently interpreted, are in
conflict with d-wave pairing, we refute the further claim that they agree with
s-wave.Comment: 14 pages, 11 figure
Reduction of the Three Dimensional Schrodinger Equation for Multilayered Films
In this paper, we present a method for reducing the three dimensional
Schrodinger equation to study confined metallic states, such as quantum well
states, in a multilayer film geometry. While discussing some approximations
that are employed when dealing with the three dimensionality of the problem, we
derive a one dimensional equation suitable for studying such states using an
envelope function approach. Some applications to the Cu/Co multilayer system
with regard to spin tunneling/rotations and angle resolved photoemission are
discussed.Comment: 14 pages, 1 figur
Properties and Applications of the Electrohydraulic Servosystem of the Hydraulic Excavator
The service of a hydraulic excavator is complicated by poor environment. The safety and stability of the control system are influenced by external factors. The object of the study is the electrohydraulic servosystem of the hydraulic excavator. The mathematical and simulation models using AMESIM for the servosystem are constructed. Then the pressure and flow characteristics are analyzed. The design and optimization of the electrohydraulic servosystem and its application in excavator engineering are described. The operation process is graphically presented by a curve, which steeply slopes up (rising period) and then flattens out (stabilization period), those periods are shortened by 38.0 and 40.5%, respectively, the delay tracking period decreased by 52.6%, and anti-interference is reliable.ΠΠΊΡΠΏΠ»ΡΠ°ΡΠ°ΡΠΈΡ Π³ΠΈΠ΄ΡΠ°Π²Π»ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΡΠΊΡΠΊΠ°Π²Π°ΡΠΎΡΠ° ΠΎΡΠ»ΠΎΠΆΠ½ΡΠ΅ΡΡΡ Π½Π°Π»ΠΈΡΠΈΠ΅ΠΌ Π½Π΅Π±Π»Π°Π³ΠΎΠΏΡΠΈΡΡΠ½ΠΎΠΉ ΡΠ°Π±ΠΎΡΠ΅ΠΉ ΡΡΠ΅Π΄Ρ. ΠΠΎΠΊΠ°Π·Π°Π½ΠΎ Π²ΠΎΠ·Π΄Π΅ΠΉΡΡΠ²ΠΈΠ΅ Π²Π½Π΅ΡΠ½ΠΈΡ
ΡΠ°ΠΊΡΠΎΡΠΎΠ² Π½Π° Π½Π°Π΄Π΅ΠΆΠ½ΠΎΡΡΡ ΠΈ ΡΡΠ°Π±ΠΈΠ»ΡΠ½ΠΎΡΡΡ ΡΠΈΡΡΠ΅ΠΌΡ ΠΊΠΎΠ½ΡΡΠΎΠ»Ρ. ΠΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½Π° ΡΠ»Π΅ΠΊΡΡΠΎΠ³ΠΈΠ΄ΡΠ°Π²Π»ΠΈΡΠ΅ΡΠΊΠ°Ρ ΡΠ΅ΡΠ²ΠΎΡΠΈΡΡΠ΅ΠΌΠ° Π³ΠΈΠ΄ΡΠ°Π²Π»ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΡΠΊΡΠΊΠ°Π²Π°ΡΠΎΡΠ°. ΠΠΎΡΡΡΠΎΠ΅Π½Ρ ΠΌΠ°ΡΠ΅ΠΌΠ°ΡΠΈΡΠ΅ΡΠΊΠ°Ρ ΠΈ ΠΈΠΌΠΈΡΠ°ΡΠΈΠΎΠ½Π½Π°Ρ ΠΌΠΎΠ΄Π΅Π»ΠΈ Π΄Π»Ρ ΡΠ΅ΡΠ²ΠΎΡΠΈΡΡΠ΅ΠΌΡ Ρ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΠ΅ΠΌ ΠΏΡΠΎΠ³ΡΠ°ΠΌΠΌΡ AMESIM. ΠΡΠΏΠΎΠ»Π½Π΅Π½ Π°Π½Π°Π»ΠΈΠ· Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊ Π΄Π°Π²Π»Π΅Π½ΠΈΡ ΠΈ ΡΠ΅ΠΊΡΡΠ΅ΡΡΠΈ. ΠΠΏΠΈΡΠ°Π½Ρ ΠΊΠΎΠ½ΡΡΡΡΠΊΡΠΈΡ ΠΈ ΠΎΠΏΡΠΈΠΌΠΈΠ·Π°ΡΠΈΡ ΡΠ»Π΅ΠΊΡΡΠΎΠ³ΠΈΠ΄ΡΠ°Π²Π»ΠΈΡΠ΅ΡΠΊΠΎΠΉ ΡΠ΅ΡΠ²ΠΎΡΠΈΡΡΠ΅ΠΌΡ, Π° ΡΠ°ΠΊΠΆΠ΅ Π΅Π΅ ΠΏΡΠΈΠΌΠ΅Π½Π΅Π½ΠΈΠ΅ Π² ΡΠΊΡΠΊΠ°Π²Π°ΡΠΎΡΠ½ΠΎΠΉ ΡΠ΅Ρ
Π½ΠΈΠΊΠ΅. ΠΡΠΎΡΠ΅ΡΡ ΡΡΠ½ΠΊΡΠΈΠΎΠ½ΠΈΡΠΎΠ²Π°Π½ΠΈΡ ΡΠ»Π΅ΠΊΡΡΠΎΠ³ΠΈΠ΄ΡΠ°Π²Π»ΠΈΡΠ΅ΡΠΊΠΎΠΉ ΡΠ΅ΡΠ²ΠΎΡΠΈΡΡΠ΅ΠΌΡ ΠΏΡΠ΅Π΄ΡΡΠ°Π²Π»Π΅Π½ ΠΊΡΠΈΠ²ΠΎΠΉ, ΠΊΠΎΡΠΎΡΠ°Ρ ΠΊΡΡΡΠΎ ΠΈΠ΄Π΅Ρ Π²Π²Π΅ΡΡ
(ΠΏΠ΅ΡΠΈΠΎΠ΄ ΠΏΠΎΠ΄ΡΠ΅ΠΌΠ°), Π° Π·Π°ΡΠ΅ΠΌ Π²ΡΡ
ΠΎΠ΄ΠΈΡ Π½Π° ΠΏΠ»Π°ΡΠΎ (ΠΏΠ΅ΡΠΈΠΎΠ΄ ΡΡΠ°Π±ΠΈΠ»ΠΈΠ·Π°ΡΠΈΠΈ), ΡΡΠΈ ΠΏΠ΅ΡΠΈΠΎΠ΄Ρ ΡΠΎΠΊΡΠ°ΡΠ°ΡΡΡΡ Π½Π° 38,0 ΠΈ 40,5% ΡΠΎΠΎΡΠ²Π΅ΡΡΡΠ²Π΅Π½Π½ΠΎ, ΠΏΠ΅ΡΠΈΠΎΠ΄ ΡΠ»Π΅ΠΆΠ΅Π½ΠΈΡ Π·Π° Π·Π°Π΄Π΅ΡΠΆΠΊΠΎΠΉ Π½Π° 52,6% ΠΏΡΠΈ ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΠΉ ΠΏΠΎΠΌΠ΅Ρ
ΠΎΡΡΡΠΎΠΉΡΠΈΠ²ΠΎΡΡΠΈ
Effect of magnetic and non-magnetic impurities on highly anisotropic superconductivity
We generalize Abrikosov-Gor'kov solution of the problem of weakly coupled
superconductor with impurities on the case of a multiband superconductor with
arbitrary interband order parameter anisotropy, including interband sign
reversal of the order parameter. The solution is given in terms of the
effective (renormalized) coupling matrix and describes not only
suppression but also renormalization of the superconducting gap basically at
all temperatures. In many limiting cases we find analytical solutions for the
critical temperature suppression. We illustrate our results by numerical
calculations for two-band model systems.Comment: 18 pages (12pt) RevTeX, 4 postscript figure
Influence of a Uniform Current on Collective Magnetization Dynamics in a Ferromagnetic Metal
We discuss the influence of a uniform current, , on the
magnetization dynamics of a ferromagnetic metal. We find that the magnon energy
has a current-induced contribution proportional to
, where is the spin-current, and
predict that collective dynamics will be more strongly damped at finite . We obtain similar results for models with and without local moment
participation in the magnetic order. For transition metal ferromagnets, we
estimate that the uniform magnetic state will be destabilized for . We discuss the relationship of this effect to
the spin-torque effects that alter magnetization dynamics in inhomogeneous
magnetic systems.Comment: 12 pages, 2 figure
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