TY - JOUR
T1 - Particle-hole symmetry in the antiferromagnetic state of the cuprates
AU - Wang, Y.
AU - Ong, N. P.
PY - 2001/9/25
Y1 - 2001/9/25
N2 - In the layered cuprate perovskites, the occurrence of high-temperature superconductivity seems deeply related to the unusual nature of the hole excitations. The limiting case of a very small number of holes diffusing in the antiferromagnetic (AF) background may provide important insights into this problem. We have investigated the transport properties in a series of crystals of YBa2Cu3Oy, and found that the temperature dependencies of the Hall coefficient RH and thermopower S change abruptly as soon as the AF phase boundary is crossed. In the AF state at low temperatures T, both RH and S are unexpectedly suppressed to nearly zero over a broad interval of T. We argue that this suppression arises from near-exact symmetry in the particle-hole currents. From the trends in RH and S, we infer that the symmetry is increasingly robust as the hole density x becomes very small (x ≃ 0.01). We discuss implications for electronic properties both within the AF state and outside.
AB - In the layered cuprate perovskites, the occurrence of high-temperature superconductivity seems deeply related to the unusual nature of the hole excitations. The limiting case of a very small number of holes diffusing in the antiferromagnetic (AF) background may provide important insights into this problem. We have investigated the transport properties in a series of crystals of YBa2Cu3Oy, and found that the temperature dependencies of the Hall coefficient RH and thermopower S change abruptly as soon as the AF phase boundary is crossed. In the AF state at low temperatures T, both RH and S are unexpectedly suppressed to nearly zero over a broad interval of T. We argue that this suppression arises from near-exact symmetry in the particle-hole currents. From the trends in RH and S, we infer that the symmetry is increasingly robust as the hole density x becomes very small (x ≃ 0.01). We discuss implications for electronic properties both within the AF state and outside.
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U2 - 10.1073/pnas.201228498
DO - 10.1073/pnas.201228498
M3 - Article
C2 - 11562471
SN - 0027-8424
VL - 98
SP - 11091
EP - 11096
JO - Proceedings of the National Academy of Sciences of the United States of America
JF - Proceedings of the National Academy of Sciences of the United States of America
IS - 20
ER -