Energy gap distribution of HgBa{sub 2}CuO{sub 4+{delta}} investigated by scanning tunneling microscopy/spectroscopy
Journal Article
·
· Journal of Low Temperature Physics
- Univ. of Basel (Switzerland); and others
The superconducting energy gap distribution of polycrystalline HgBa{sub 2}CuO{sub 4+{delta}} samples of differing oxygen doping levels (T{sub c} = 94 K and T{sub c} = 96 K) is determined by scanning tunneling spectroscopy (STS) using a low temperature scanning tunneling microscope (STM). From histograms of energy gap values the presence of two distinct energy gaps is inferred ({Delta}{sub 1}=8.5{+-}1.6 meV and {Delta}{sub 2}=15.1{+-}1.4meV). The authors attribute the different gaps to different crystallographic faces, implying a non-BCS electron-electron pairing mechanism.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 443653
- Report Number(s):
- CONF-960808--
- Journal Information:
- Journal of Low Temperature Physics, Journal Name: Journal of Low Temperature Physics Journal Issue: 5-6 Vol. 105; ISSN 0022-2291; ISSN JLTPAC
- Country of Publication:
- United States
- Language:
- English
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