Quantum corrections to the conductivity in icosahedral Al-Cu-Fe alloys

Occurrence of Kondo-like behavior in electrical-conductivity of Al70Pd20+xMn10−x (x=0,1 and 2) icosahedral quasicrystals

“…In fact this behavior has been observed in some structurally high quality quasicrystals like Al-Pd-Re and Al-Cu-Ru [4][5][6]. But transport measurements like magneto-resistance on various quasicrystals do show overwhelming presence of quantum interference effects (QIE) like weak-localization and interaction effects [7][8][9][10][11][12][13][14][15][16][17][18][19][20]. In the presence of enhanced elastic scattering QIEÕs are the most likely.…”

Magnetoresistance studies in Al70Pd20+xMn10−x (x=0, 1) icosahedral quasicrystals

“…In fact it has been realized in some structurally high quality quasicrystals like Al-Pd-Re and Al-Cu-Ru [2,3]. But magnetoresistance (Dq=q) measurements on various quasicrystals show an overwhelming presence of quantum interference effects (QIE) [4][5][6][7][8][9][10][11][12][13]. QIEs are more distinctively observed in stable qc-alloys like Al-PdMn.…”

Is the Negative Temperature Coefficient of the Resistivity of the Quasicrystals due to Chemical Disorder?

“…The positive TCR has also been confirmed by a recent study on a single-grained i Cd-Yb grown by the Bridgman technique, verifying that the positive TCR is not due to imperfections such as grain boundaries and undetectable foreign phases that might exist at the boundaries [8]. We note that the results of the binary i phases have broken the empirical rule deduced from studies on ternary stable i phases; that is, the TCR of stable i phases is negative at low temperatures except for a small positive TCR due to the weak localization effect with a strong spin-orbit interaction seen in Altransition metal systems such as i AlPdMn [9,10] and i AlCuFe [11,12]. The most striking feature in Fig.…”