Low-energy spectroscopic mapping studies in optimally-doped Ca2-xNaxCuO2Cl2

T. Hanaguri; Y. Kohsaka; J. C. Séamus Davis; C. Lupien; I. Yamada; M. Azuma; M. Takano; K. Ohishi; H. Takagi

doi:10.1016/j.physc.2007.03.324

Low-energy spectroscopic mapping studies in optimally-doped Ca_2-xNa_xCuO₂Cl₂

T. Hanaguri
, Y. Kohsaka
, J. C. Séamus Davis
, C. Lupien
, I. Yamada
, M. Azuma
, M. Takano
, K. Ohishi
, H. Takagi

Research output: Contribution to journal › Article › peer-review

Abstract

We performed high-resolution scanning tunneling microscopy/spectroscopy on an optimally-doped Ca_2-xNa_xCuO₂Cl₂ crystal with T_c ∼ 25 K. The so-called "checkerboard" local-density-of-state modulation previously found in heavily underdoped regime also manifests in the spectroscopic map of the optimally-doped sample. In addition, spatially-inhomogeneous energy gap with peaks at the gap edges is observed below about 10 meV. The gap tends to be buried at elevated temperatures and correlates with the checkerboard modulation. These results suggest that the gap is related to superconductivity which coexists with the checkerboard modulation.

Original language	English
Pages (from-to)	954-955
Number of pages	2
Journal	Physica C: Superconductivity and its Applications
Volume	460-462 II
Issue number	SPEC. ISS.
DOIs	https://doi.org/10.1016/j.physc.2007.03.324
Publication status	Published - 1 Sep 2007
Externally published	Yes

Keywords

Charge order
Magnetic field effect
STM/STS
Superconductivity

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10.1016/j.physc.2007.03.324

Cite this

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title = "Low-energy spectroscopic mapping studies in optimally-doped Ca2-xNaxCuO2Cl2",

abstract = "We performed high-resolution scanning tunneling microscopy/spectroscopy on an optimally-doped Ca2-xNaxCuO2Cl2 crystal with Tc ∼ 25 K. The so-called {"}checkerboard{"} local-density-of-state modulation previously found in heavily underdoped regime also manifests in the spectroscopic map of the optimally-doped sample. In addition, spatially-inhomogeneous energy gap with peaks at the gap edges is observed below about 10 meV. The gap tends to be buried at elevated temperatures and correlates with the checkerboard modulation. These results suggest that the gap is related to superconductivity which coexists with the checkerboard modulation.",

keywords = "Charge order, Magnetic field effect, STM/STS, Superconductivity",

author = "T. Hanaguri and Y. Kohsaka and \{S{\'e}amus Davis\}, \{J. C.\} and C. Lupien and I. Yamada and M. Azuma and M. Takano and K. Ohishi and H. Takagi",

year = "2007",

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doi = "10.1016/j.physc.2007.03.324",

language = "English",

volume = "460-462 II",

pages = "954--955",

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TY - JOUR

T1 - Low-energy spectroscopic mapping studies in optimally-doped Ca2-xNaxCuO2Cl2

AU - Hanaguri, T.

AU - Kohsaka, Y.

AU - Séamus Davis, J. C.

AU - Lupien, C.

AU - Yamada, I.

AU - Azuma, M.

AU - Takano, M.

AU - Ohishi, K.

AU - Takagi, H.

PY - 2007/9/1

Y1 - 2007/9/1

N2 - We performed high-resolution scanning tunneling microscopy/spectroscopy on an optimally-doped Ca2-xNaxCuO2Cl2 crystal with Tc ∼ 25 K. The so-called "checkerboard" local-density-of-state modulation previously found in heavily underdoped regime also manifests in the spectroscopic map of the optimally-doped sample. In addition, spatially-inhomogeneous energy gap with peaks at the gap edges is observed below about 10 meV. The gap tends to be buried at elevated temperatures and correlates with the checkerboard modulation. These results suggest that the gap is related to superconductivity which coexists with the checkerboard modulation.

AB - We performed high-resolution scanning tunneling microscopy/spectroscopy on an optimally-doped Ca2-xNaxCuO2Cl2 crystal with Tc ∼ 25 K. The so-called "checkerboard" local-density-of-state modulation previously found in heavily underdoped regime also manifests in the spectroscopic map of the optimally-doped sample. In addition, spatially-inhomogeneous energy gap with peaks at the gap edges is observed below about 10 meV. The gap tends to be buried at elevated temperatures and correlates with the checkerboard modulation. These results suggest that the gap is related to superconductivity which coexists with the checkerboard modulation.

KW - Charge order

KW - Magnetic field effect

KW - STM/STS

KW - Superconductivity

UR - https://www.scopus.com/pages/publications/34548153541

U2 - 10.1016/j.physc.2007.03.324

DO - 10.1016/j.physc.2007.03.324

M3 - Article

AN - SCOPUS:34548153541

SN - 0921-4534

VL - 460-462 II

SP - 954

EP - 955

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

IS - SPEC. ISS.

ER -

Low-energy spectroscopic mapping studies in optimally-doped Ca_2-xNa_xCuO₂Cl₂

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Keywords

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