TY - JOUR
T1 - Evolution of the Fermi surface of a doped topological insulator with carrier concentration
AU - Lahoud, E.
AU - Maniv, E.
AU - Petrushevsky, M. Shaviv
AU - Naamneh, M.
AU - Ribak, A.
AU - Wiedmann, S.
AU - Petaccia, L.
AU - Salman, Z.
AU - Chashka, K. B.
AU - Dagan, Y.
AU - Kanigel, A.
PY - 2013/11/5
Y1 - 2013/11/5
N2 - In an ideal bulk topological insulator (TI) conducting surface states protected by time-reversal symmetry enfold an insulating crystal. However, the archetypical TI, Bi2Se3, is actually never insulating; it is in fact a relatively good metal. Nevertheless, it is the most studied system among all the TIs, mainly due to its simple band structure and large spin-orbit gap. Recently, it was shown that copper intercalated Bi2Se 3 becomes superconducting and it was suggested as a realization of a topological superconductor. Here we use a combination of techniques that are sensitive to the shape of the Fermi surface (FS): the Shubnikov-de Haas effect and angle-resolved photoemission spectroscopy to study the evolution of the FS shape with carrier concentration, n. We find that as n increases, the FS becomes two-dimensional-like. These results are of crucial importance for understanding the superconducting properties of CuxBi2Se3.
AB - In an ideal bulk topological insulator (TI) conducting surface states protected by time-reversal symmetry enfold an insulating crystal. However, the archetypical TI, Bi2Se3, is actually never insulating; it is in fact a relatively good metal. Nevertheless, it is the most studied system among all the TIs, mainly due to its simple band structure and large spin-orbit gap. Recently, it was shown that copper intercalated Bi2Se 3 becomes superconducting and it was suggested as a realization of a topological superconductor. Here we use a combination of techniques that are sensitive to the shape of the Fermi surface (FS): the Shubnikov-de Haas effect and angle-resolved photoemission spectroscopy to study the evolution of the FS shape with carrier concentration, n. We find that as n increases, the FS becomes two-dimensional-like. These results are of crucial importance for understanding the superconducting properties of CuxBi2Se3.
UR - http://www.scopus.com/inward/record.url?scp=84887522850&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.88.195107
DO - 10.1103/PhysRevB.88.195107
M3 - Article
AN - SCOPUS:84887522850
SN - 1098-0121
VL - 88
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 19
M1 - 195107
ER -