TY - JOUR

T1 - Electronic structure of quasicrystals studied by ultrahigh-energy-resolution photoemission spectroscopy

AU - Stadnik, Z.

AU - Purdie, D.

AU - Garnier, M.

AU - Baer, Y.

AU - Tsai, A. P.

AU - Inoue, A.

AU - Edagawa, K.

AU - Takeuchi, S.

AU - Buschow, K. H.J.

PY - 1997

Y1 - 1997

N2 - The results of low-temperature, ultrahigh-resolution ultraviolet photoemission studies of the electronic structure of stable icosahedral (Formula presented)(Formula presented)(Formula presented), (Formula presented)(Formula presented)(Formula presented), (Formula presented)(Formula presented)(Formula presented), (Formula presented)(Formula presented)(Formula presented)(Formula presented), (Formula presented)(Formula presented)(Formula presented), (Formula presented)(Formula presented)(Formula presented), (Formula presented)(Formula presented)(Formula presented)(Formula presented), (Formula presented)(Formula presented)(Formula presented), and (Formula presented)(Formula presented)(Formula presented), decagonal (Formula presented)(Formula presented)(Formula presented) and (Formula presented)(Formula presented)(Formula presented), and crystalline (Formula presented)(Formula presented)Ru and (Formula presented)MnAl alloys are presented. It is shown that these alloys have a clearly developed Fermi edge, and are thus metallic down to the temperature of measurement (12-45 K). A marked decrease of the spectral intensity toward the Fermi level in quasicrystals is demonstrated to be consistent with the existence of the theoretically predicted pseudogap. With an experimental resolution of 5 meV, no evidence of the theoretically predicted spikiness of the density of states could be observed. A close similarity between the values and unusual dependencies of various physical parameters observed in quasicrystals and in their approximants suggests that they are not the consequence of the long-range quasiperiodicity, but rather result from a complex local atomic order. A review of the electronic properties of quasicrystals is also presented.

AB - The results of low-temperature, ultrahigh-resolution ultraviolet photoemission studies of the electronic structure of stable icosahedral (Formula presented)(Formula presented)(Formula presented), (Formula presented)(Formula presented)(Formula presented), (Formula presented)(Formula presented)(Formula presented), (Formula presented)(Formula presented)(Formula presented)(Formula presented), (Formula presented)(Formula presented)(Formula presented), (Formula presented)(Formula presented)(Formula presented), (Formula presented)(Formula presented)(Formula presented)(Formula presented), (Formula presented)(Formula presented)(Formula presented), and (Formula presented)(Formula presented)(Formula presented), decagonal (Formula presented)(Formula presented)(Formula presented) and (Formula presented)(Formula presented)(Formula presented), and crystalline (Formula presented)(Formula presented)Ru and (Formula presented)MnAl alloys are presented. It is shown that these alloys have a clearly developed Fermi edge, and are thus metallic down to the temperature of measurement (12-45 K). A marked decrease of the spectral intensity toward the Fermi level in quasicrystals is demonstrated to be consistent with the existence of the theoretically predicted pseudogap. With an experimental resolution of 5 meV, no evidence of the theoretically predicted spikiness of the density of states could be observed. A close similarity between the values and unusual dependencies of various physical parameters observed in quasicrystals and in their approximants suggests that they are not the consequence of the long-range quasiperiodicity, but rather result from a complex local atomic order. A review of the electronic properties of quasicrystals is also presented.

UR - http://www.scopus.com/inward/record.url?scp=0001470542&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0001470542&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.55.10938

DO - 10.1103/PhysRevB.55.10938

M3 - Article

AN - SCOPUS:0001470542

VL - 55

SP - 10938

EP - 10951

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

SN - 0163-1829

IS - 16

ER -