Doping and Temperature Dependence of the Mass Enhancement Observed in the Cuprate <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi>Bi</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow><mrow><msub><mrow><mi>Sr</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow><mrow><msub><mrow><mi>CaCu</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow><mrow><msub><mrow><mi>O</mi></mrow><mrow><mn>8</mn><mo>+</mo><mi>δ</mi></mrow></msub></mrow></math></span>

P. D. Johnson; T. Valla; A. V. Fedorov; Z. Yusof; B. O. Wells; Q. Li; A. R. Moodenbaugh; G. D. Gu; N. Koshizuka; C. Kendziora; Sha Jian; D. G. Hinks

doi:10.1103/PhysRevLett.87.177007

Doping and Temperature Dependence of the Mass Enhancement Observed in the Cuprate ${Bi}_{2} {Sr}_{2} {CaCu}_{2} O_{8 + δ}$

P. D. Johnson, T. Valla, A. V. Fedorov, Z. Yusof, B. O. Wells, Q. Li, A. R. Moodenbaugh, G. D. Gu, N. Koshizuka, C. Kendziora, Sha Jian, and D. G. Hinks

Phys. Rev. Lett. 87, 177007 – Published 8 October 2001

Abstract

High-resolution photoemission is used to study the electronic structure of the cuprate superconductor, ${Bi}_{2} {Sr}_{2} {CaCu}_{2} O_{8 + δ}$ , as a function of hole doping and temperature. A kink observed in the band dispersion in the nodal line in the superconducting state is associated with coupling to a resonant mode observed in neutron scattering. From the measured real part of the self-energy it is possible to extract a coupling constant which is largest in the underdoped regime, then decreasing continuously into the overdoped regime.

Received 14 February 2001

DOI:https://doi.org/10.1103/PhysRevLett.87.177007

Authors & Affiliations

P. D. Johnson¹, T. Valla¹, A. V. Fedorov^1,*, Z. Yusof², B. O. Wells², Q. Li³, A. R. Moodenbaugh³, G. D. Gu⁴, N. Koshizuka⁵, C. Kendziora⁶, Sha Jian⁷, and D. G. Hinks⁷

¹Department of Physics, Brookhaven National Laboratory, Upton, New York 11973-5000
²Department of Physics, University of Connecticut, 2152 Hillside Road U-46, Storrs, Connecticut 06269
³Division of Materials Sciences, Brookhaven National Laboratory, Upton, New York 11973
⁴School of Physics, University of New South Wales, P.O. Box 1, Kensington, New South Wales, Australia 2033
⁵Superconductivity Research Laboratory, ISTEC, 10-13, Shinonome I-chrome, Koto-ku, Tokyo 135, Japan
⁶Materials Sciences Division, Naval Research Laboratory, Washington, D.C. 20375
⁷Materials Sciences Division, Argonne National Laboratory, Argonne, Illinois 60439

^*Present address: Department of Physics, University of Colorado, Boulder, CO 80309-0390 and Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720.