- Tytuł:
- Transport in Quantum Structures of Diluted Magnetic Semiconductors
- Autorzy:
- Jaroszyński, J.
- Powiązania:
- https://bibliotekanauki.pl/articles/2011139.pdf
- Data publikacji:
- 1999-11
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
-
73.50.Td
72.15.Rn
73.61.Ga
75.50.Lk - Opis:
- This paper reviews recent millikelvin studies of magnetoconductance and noise in nanostructures of a diluted magnetic semiconductor n-Cd$\text{}_{1-x}$Mn$\text{}_{x}$Te. These studies were particularly rewarding for probing the influence of magnetic ions upon mesoscopic phenomena. The accumulated results demonstrated the existence of a new driving mechanism of the universal conductance fluctuations in magnetic systems. Several signatures of spin-glass freezing were observed, such as the appearance of 1/f conductance noise, aging, thermal, and magnetic irreversibilities as well as a strong increase in the amplitude of both conductance fluctuations and noise when temperature and the magnetic field were lowered below the freezing line. A statistical analysis of conductance noise made it possible to investigate the nature of excitations in spin-glass phase, and to discriminate between competing theoretical models.
- Źródło:
-
Acta Physica Polonica A; 1999, 96, 5; 641-650
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki