Temat: 71.45.Lr - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Spin-Dependent Tunneling in a Magnetic Field for Junctions Involving Normal and Superconducting CDW Metals
Autorzy:: Ekino, T.
Gabovich, A. M.
Suan Li, Mai
Pękała, M.
Szymczak, H.
Voitenko, A. I.
Powiązania:: https://bibliotekanauki.pl/articles/2046730.pdf
Data publikacji:: 2006-04
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 71.45.Lr
74.50.+r
85.75.-d
Opis:: The voltage, V, dependences of the differential tunnel conductance G(V) were calculated for two kinds of junctions involving normal and superconducting charge-density-wave metals (CDWMs) in the external magnetic field H. The first is a non-symmetrical junction with a CDWM electrode being biased with respect to a ferromagnet. Calculations show that the paramagnetic splitting occurs between spin-up and spin-down components of G(V), similar to what is observed when a superconducting electrode is used instead of the CDWM one. The second setup is symmetric (CDWM-I-CDWM), where I denotes an insulator. If at least one of the CDWM electrodes is normal and H≠0, G(V) will also be spin-split.
Źródło:: Acta Physica Polonica A; 2006, 109, 4-5; 477-484
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Pseudogap-Like Phenomena in Cuprates as a Manifestation of Charge-Density Waves
Autorzy:: Ekino, T.
Gabovich, A.
Voitenko, A.
Suan Li, Mai
Szymczak, H.
Pękała, M.
Powiązania:: https://bibliotekanauki.pl/articles/1812272.pdf
Data publikacji:: 2008-07
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 73.43.Jn
71.45.Lr
74.50.+r
74.81.-g
Opis:: Differential conductance G as a function of the bias voltage V was measured for break-junctions of superconducting $Bi_2Sr_2CaCu_2O_{8+δ}$ and $YBa_2Cu_3O_{7-δ}$. The dependences G(V) for both materials clearly demonstrate the so-called dip-hump structures outside the gap region. A theory, which suggests the charge-density-wave origin of the dip-hump structures and explains its specific form by intrinsic inhomogeneity of cuprate materials, was developed. The well-known pseudogap features in the tunnel spectra of high-$T_c$ oxides found both below and above the superconducting critical temperature are also described by the theory, which testifies that both the pseudogap and the dip-hump structures have the same origin. Competing theories and various G(V) peculiarities found for a number of superconducting oxides are briefly discussed.
Źródło:: Acta Physica Polonica A; 2008, 114, 1; 59-66
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Charge-Density-Wave Origin of Dip-Hump Structures in the Tunnel Spectra of Bi$\text{}_{2}$Sr$\text{}_{2}$CaCu$\text{}_{2}$O$\text{}_{8+δ}$
Autorzy:: Ekino, T.
Gabovich, A. M.
Li, M. S.
Pękała, M.
Szymczak, H.
Voitenko, A. I.
Powiązania:: https://bibliotekanauki.pl/articles/2047318.pdf
Data publikacji:: 2007-04
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 73.43.Jn
71.45.Lr
74.50.+r
74.81.-g
Opis:: We calculated the differential conductance G as the function of the bias voltage V across the tunnel junction between a normal metal or a conventional superconductor and an inhomogeneous superconductor with charge density waves. Spatial averaging over random domains with varying superconducting and normal state properties was carried out. For high-T$\text{}_{c}$ oxides, irregularly distorted charge density wave patterns with spatially scattered values of various parameters were earlier shown to manifest themselves in a great body of experimental data. The results of calculation were applied to explain the well-known dip-hump structure in the G(V) dependence for Bi$\text{}_{2}$Sr$\text{}_{2}$CaCu$\text{}_{2}$O$\text{}_{8+δ}$ and other cuprates.
Źródło:: Acta Physica Polonica A; 2007, 111, 4; 573-580
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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