Temperature Effect and Fermi Surface Investigation in the Scanning Tunneling Microscopy of Bi$_2$Sr$_2$CaCu$_2$O$_8$

K. -K. Voo; W. C. Wu; H. -Y. Chen; C. -Y. Mou

doi:10.1016/j.physc.2004.09.007

paper

Temperature Effect and Fermi Surface Investigation in the Scanning Tunneling Microscopy of Bi $_{2}$ Sr $_{2}$ CaCu $_{2}$ O $_{8}$

arXiv:cond-mat/0308149 · doi:10.1016/j.physc.2004.09.007

Abstract

Based on a Fermi liquid picture, the temperature effect on the impurity-induced spatial modulation of local density of states (LDOS) is investigated for the d-wave superconductor Bi $_{2}$ Sr $_{2}$ CaCu $_{2}$ O $_{8}$ , in the context of scanning tunneling microscopy (STM). It is found that stripe-like structure exists even in the normal state due to a local-nesting mechanism, which is different from the octet scattering mechanism proposed by McElroy $e t a l$ . {[Nature {\bf 422}, 592 (2003)]} in the d-wave superconducting ( $d$ SC) state. The normal-state spectra, when Fourier-transformed into the reciprocal space, can reveal the information of the entire Fermi surface at a single measuring bias, in contrast to the point-wise tracing proposed by McElroy $e t a l$ . This may serve as another way to check the reality of Landau quasiparticles in the normal state. We have also re-visited the spectra in the $d$ SC state and pointed out that, due to the Umklapp symmetry of the lattice, there should exist additional peaks in the reciprocal space, but experimentally yet to be found.

arXiv comment5 pages, 5 figures

Temperature Effect and Fermi Surface Investigation in the Scanning Tunneling Microscopy of Bi2​Sr2​CaCu2​O8​

Abstract

References in corpus (8)

Temperature Effect and Fermi Surface Investigation in the Scanning Tunneling Microscopy of Bi $_{2}$ Sr $_{2}$ CaCu $_{2}$ O $_{8}$