scholarly journals Generalized method of Feynman-Pines diagram technique in the theory of energy spectrum of two-level quasiparticle renormalized due to multi-phonon processes at cryogenic temperature

2018 ◽  
Vol 21 (4) ◽  
pp. 43703 ◽  
Author(s):  
Tkach ◽  
Pytiuk ◽  
Voitsekhivska ◽  
Seti
Keyword(s):  
Energy Spectrum ◽  
Cryogenic Temperature ◽  
Diagram Technique

scholarly journals Strong coupling diagram technique for the three-band Hubbard model

2016 ◽  
Vol 30 (13) ◽  
pp. 1642004
Author(s):  
A. Sherman
Keyword(s):  
Energy Spectrum ◽  
Hubbard Model ◽  
Strong Coupling ◽  
Green’S Functions ◽  
Diagram Technique ◽  
Irreducible Part ◽  
Calculated Energy ◽  
Small Admixture ◽  
Copper Sites ◽  
Mixed Nature

Strong coupling diagram technique equations are derived for hole Green’s functions of the three-band Hubbard model, which describes Cu–O planes of high-[Formula: see text] cuprates. The equations are self-consistently solved in the approximation, in which the series for the irreducible part in powers of the oxygen–copper hopping constant is truncated to two lowest-order terms. For parameters used for hole-doped cuprates, the calculated energy spectrum consists of lower and upper Hubbard subbands of predominantly copper nature, oxygen bands with a small admixture of copper states and the Zhang–Rice states of mixed nature, which are located between the lower Hubbard subband and oxygen bands. The spectrum contains also pseudogaps near transition frequencies of Hubbard atoms on copper sites.

Phase Transformation In Ti-6al-4v Alloys

1972 ◽  
Vol 30 ◽  
pp. 584-585
Author(s):  
Shiro Fujishiro
Keyword(s):  
Phase Transformation ◽  
Grain Boundary ◽  
Cryogenic Temperature ◽  
Β Phase ◽  
Heat Treated ◽  
Mixed Microstructure ◽  
Ductile Behavior

The Ti-6 wt.% Al-4 wt.% V commercial alloys have exhibited an improved formability at cryogenic temperature when the alloys were heat-treated prior to the tests. The author was interested in further investigating this unusual ductile behavior which may be associated with the strain-induced transformation or twinning of the a phase, enhanced at lower temperatures. The starting materials, supplied by RMI Co., Niles, Ohio were rolled mill products in the form of 40 mil sheets. The microstructure of the as-received materials contained mainly ellipsoidal α grains measuring between 1 and 5μ. The β phase formed an undefined grain boundary around the a grains. The specimens were homogenized at 1050°C for one hour, followed by aging at 500°C for two hours, and then quenched in water to produce the α/β mixed microstructure.

Energy spectrum of superhigh-energy cosmic rays

1982 ◽  
Vol 136 (2) ◽  
pp. 351 ◽  
Author(s):  
G.B. Khristiansen
Keyword(s):  
Energy Spectrum ◽  
Cosmic Rays ◽  
Superhigh Energy

The electronic energy spectrum of zero-gap semiconductors

1976 ◽  
Vol 120 (11) ◽  
pp. 337 ◽  
Author(s):  
B.L. Gel'mont ◽  
V.I. Ivanov-Omskii ◽  
I.M. Tsidil'kovskii
Keyword(s):  
Energy Spectrum ◽  
Electronic Energy ◽  
Electronic Energy Spectrum

Acquisition and Evaluation of Gamma-ray Energy Spectrum with CsPbBr3

2019 ◽  
Author(s):  
Lei R. Cao ◽  
Lei Pan ◽  
Yuanxiang Feng ◽  
Praneeth Kandlakunta ◽  
Jinsong Huang
Keyword(s):  
Energy Spectrum ◽  
Gamma Ray

Zr-N thin film thermometer for cryogenic temperature.

Shinku ◽  
1987 ◽  
Vol 30 (5) ◽  
pp. 374-377
Author(s):  
Tsutom YOTSUYA ◽  
Ziro ISHIBE ◽  
Masaaki YOSHITAKE ◽  
Yoshihiko SUZUKI ◽  
Junya YAMAMOTO
Keyword(s):  
Thin Film ◽  
Cryogenic Temperature
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