Open AccessNewly Observed Phase Coherent Electron Transport Properties in the Mesoscopic Loop Structure of Aluminum Wire
Author(s) -
Lee Seongjae,
Park Kyoung Wan,
Shin Mincheol,
Lee El Hang,
Kim JuJin,
Lee Hu Jong
Publication year - 1994
Publication title -
etri journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 46
eISSN - 2233-7326
pISSN - 1225-6463
DOI - 10.4218/etrij.94.0194.0021
Subject(s) - mesoscopic physics , condensed matter physics , superconductivity , magnetoresistance , physics , conductance , coherence (philosophical gambling strategy) , electron , phase (matter) , cooper pair , electron transport chain , magnetic field , quantum mechanics , chemistry , biochemistry
We have identified two new features related to the coherent transport in the mesoscopic loop structure of aluminum wire, including the autocorrelation of the conductance fluctuations beyond B c and fine structure in the low‐field magnetoresistance curve in the superconducting transition regime, which, to the best of our knowledge, have not been reported in the literature. Since the electrons in Al have a phase coherence length larger than 1 μ m at or below T = 3 K, which is comparable to the dimensions of the structure, the wave nature of the electronic transport has been clearly observed: the universal conductance fluctuations, the Aharonov‐Bohm oscillations, and the Altshuler‐Aronov‐Spivak oscillations. Due to the transition of Al to a superconducting state at T = 1.3 K, the coherent phenomena of Cooper pairs, i.e., the Little‐Parks oscillations, have also been observed.