TY - JOUR
T1 - Two-fluid model of the pseudogap of high-temperature cuprate superconductors based on charge- 2e bosons
AU - Chakraborty, Shiladitya
AU - Phillips, Philip
PY - 2009/10/30
Y1 - 2009/10/30
N2 - Starting from the effective low-energy theory of a doped Mott insulator, obtained by exactly integrating out the high-energy scale, we show that the effective carrier density in the underdoped regime agrees with a two-fluid description. Namely, it has distinct temperature-independent and thermally activated components. We identify the thermally activated component as the bound state of a hole and a charge- 2e boson, which occurs naturally in the effective theory. The thermally activated unbinding of this state leads to the strange metal and subsequent T -linear resistivity. We find that the doping dependence of the binding energy is in excellent agreement with the experimentally determined pseudogap energy scale in cuprate superconductors.
AB - Starting from the effective low-energy theory of a doped Mott insulator, obtained by exactly integrating out the high-energy scale, we show that the effective carrier density in the underdoped regime agrees with a two-fluid description. Namely, it has distinct temperature-independent and thermally activated components. We identify the thermally activated component as the bound state of a hole and a charge- 2e boson, which occurs naturally in the effective theory. The thermally activated unbinding of this state leads to the strange metal and subsequent T -linear resistivity. We find that the doping dependence of the binding energy is in excellent agreement with the experimentally determined pseudogap energy scale in cuprate superconductors.
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U2 - 10.1103/PhysRevB.80.132505
DO - 10.1103/PhysRevB.80.132505
M3 - Article
AN - SCOPUS:70749098264
SN - 0163-1829
VL - 80
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
IS - 13
M1 - 132505
ER -