Research output: Contribution to journal › Article › peer-review
Electronic correlation determining correlated plasmons in Sb-doped B i2 S e3. / Das, P. K.; Whitcher, T. J.; Yang, M. et al.
In: Physical Review B, Vol. 100, No. 11, 115109, 04.09.2019.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Electronic correlation determining correlated plasmons in Sb-doped B i2 S e3
AU - Das, P. K.
AU - Whitcher, T. J.
AU - Yang, M.
AU - Chi, X.
AU - Feng, Y. P.
AU - Lin, W.
AU - Chen, J. S.
AU - Vobornik, I.
AU - Fujii, J.
AU - Kokh, K. A.
AU - Tereshchenko, O. E.
AU - Diao, C. Z.
AU - Moon, Jisoo
AU - Oh, Seongshik
AU - Castro-Neto, A. H.
AU - Breese, M. B.H.
AU - Wee, A. T.S.
AU - Rusydi, A.
N1 - Publisher Copyright: © 2019 American Physical Society.
PY - 2019/9/4
Y1 - 2019/9/4
N2 - Electronic correlation is believed to play an important role in exotic phenomena such as insulator-metal transition, colossal magnetoresistance, and higherature superconductivity in correlated electron systems. Recently, it has been shown that electronic correlation may also be responsible for the formation of unconventional plasmons. Herewith, using a combination of angle-dependent spectroscopic ellipsometry, angle resolved photoemission spectroscopy, and Hall measurements, all as a function of temperature supported by first-principles calculations, the existence of low-loss high-energy correlated plasmons accompanied by spectral weight transfer, a fingerprint of electronic correlation, in topological insulator (Bi0.8Sb0.2)2Se3 is revealed. Upon cooling, the density of free charge carriers in the surface states decreases whereas that in the bulk states increases, and the recently reported correlated plasmons are key to explaining this phenomenon. Our result shows the importance of electronic correlation in determining correlated plasmons and opens an alternative path in engineering plasmonic-based topologically insulating devices.
AB - Electronic correlation is believed to play an important role in exotic phenomena such as insulator-metal transition, colossal magnetoresistance, and higherature superconductivity in correlated electron systems. Recently, it has been shown that electronic correlation may also be responsible for the formation of unconventional plasmons. Herewith, using a combination of angle-dependent spectroscopic ellipsometry, angle resolved photoemission spectroscopy, and Hall measurements, all as a function of temperature supported by first-principles calculations, the existence of low-loss high-energy correlated plasmons accompanied by spectral weight transfer, a fingerprint of electronic correlation, in topological insulator (Bi0.8Sb0.2)2Se3 is revealed. Upon cooling, the density of free charge carriers in the surface states decreases whereas that in the bulk states increases, and the recently reported correlated plasmons are key to explaining this phenomenon. Our result shows the importance of electronic correlation in determining correlated plasmons and opens an alternative path in engineering plasmonic-based topologically insulating devices.
KW - ELECTROMAGNETIC ENERGY-TRANSPORT
KW - TOPOLOGICAL INSULATOR BI2SE3
KW - INITIO MOLECULAR-DYNAMICS
KW - TRANSITION
KW - GRAPHENE
KW - BI2TE3
KW - BITECL
KW - WAVES
KW - STATE
KW - LIMIT
UR - http://www.scopus.com/inward/record.url?scp=85072586216&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.100.115109
DO - 10.1103/PhysRevB.100.115109
M3 - Article
AN - SCOPUS:85072586216
VL - 100
JO - Physical Review B
JF - Physical Review B
SN - 2469-9950
IS - 11
M1 - 115109
ER -
ID: 21612604