H. R. Ott
University of California, Irvine
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Featured researches published by H. R. Ott.
Physical Review B | 2001
Ch. Wälti; E. Felder; C. L. Degen; G. A. Wigger; R. Monnier; Bernard Delley; H. R. Ott
We report on measurements of the specific heat of the recently discovered superconductor MgB
Physical Review Letters | 2000
Ch. Wälti; H. R. Ott; Z. Fisk; J. L. Smith
_2
Journal of Superconductivity | 2000
H. R. Ott; Ch. Wälti
in the temperature range between 3 and 220 K. Based on a modified Debye-Einstein model, we have achieved a rather accurate account of the lattice contribution to the specific heat, which allows us to separate the electronic contribution from the total measured specific heat. From our result for the electronic specific heat, we estimate the electron-phonon coupling constant
Physica B-condensed Matter | 2000
P. Vonlanthen; E. Felder; Ch Wälti; S. Paschen; H. R. Ott; David P. Young; A. Bianchi; Z. Fisk
\lambda
Czechoslovak Journal of Physics | 1996
O. Jeandupeux; Ch. Wälti; H. R. Ott; A. van Otterlo
to be of the order of 2, significantly enhanced compared to common weak-coupling values
Contemporary Concepts of Condensed Matter Science | 2011
Z. Fisk; H. R. Ott
\leq 0.4
Contemporary Concepts of Condensed Matter Science | 2011
Z. Fisk; H. R. Ott
. Our data also indicate that the electronic specific heat in the superconducting state of MgB
Physical Review B | 2008
Florian Pfuner; Leonardo Degiorgi; H. R. Ott; A.D. Bianchi; Z. Fisk
_2
Physica B-condensed Matter | 2000
Ch Wälti; E. Felder; H. R. Ott; Z. Fisk; J. L. Smith
can be accounted for by a conventional, s-wave type BCS-model.
Physical Review B | 1995
M. A. Chernikov; Andrea Bianchi; H. R. Ott
We report on measurements of the differential conductivity G of UBe13-Au contacts, which reveal the existence of low-energy Andreev surface bound states. These bound states are identified via huge conductance peaks at zero bias that may form only in superconductors with nontrivial energy-gap functions. From the voltage dependence of G at T<T(c) we also establish a lower limit of the normalized energy gap, such that 2Delta(0) / k(B)T(c)>6.7, much in excess of the weak coupling BCS value of 3.5, and directly indicating strong coupling effects in superconducting UBe13.