TY - JOUR
T1 - Semiconductor-superconductor transition in granular Al-Ge
AU - Shapira, Y.
AU - Deutscher, G.
PY - 1983
Y1 - 1983
N2 - The electrical resistance of granular Al-Ge specimens has been measured for various metal concentrations around the metal-insulator transition. We find that, in a narrow range of metal concentrations, the system is semiconducting in the normal state and yet undergoes a superconducting transition. It is shown that the occurrence of the semiconductor-superconductor transition is governed by the interplay between the intergrain tunneling coupling energy, the Josephson coupling energy, and the Coulomb charging energy, and is possible only for granular systems with large enough grains.
AB - The electrical resistance of granular Al-Ge specimens has been measured for various metal concentrations around the metal-insulator transition. We find that, in a narrow range of metal concentrations, the system is semiconducting in the normal state and yet undergoes a superconducting transition. It is shown that the occurrence of the semiconductor-superconductor transition is governed by the interplay between the intergrain tunneling coupling energy, the Josephson coupling energy, and the Coulomb charging energy, and is possible only for granular systems with large enough grains.
UR - http://www.scopus.com/inward/record.url?scp=0000722770&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.27.4463
DO - 10.1103/PhysRevB.27.4463
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AN - SCOPUS:0000722770
SN - 0163-1829
VL - 27
SP - 4463
EP - 4466
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
IS - 7
ER -