328 citations · 1.1k across the 24 of their papers we have counts for
9 papers · 1 filter
Direct spectroscopic evidence for mixed-valence Tl in the low carrier-density superconductor PbTlTe
P. Walmsley, C. Liu, A. D. Palczewski +4
Upon doping with Tl the narrow band-gap semiconductor PbTe exhibits anomalously high temperature superconductivity despite a very low carrier density as well as signatures of the K…
Evidence of incoherent carriers associated with resonant impurity levels and their influence on superconductivity in the anomalous superconductor PbTlTe
P. Giraldo-Gallo, P. Walmsley, B. Sangiorgio +9
We present a combined experimental and theoretical study of the evolution of the Fermi surface of the anomalous superconductor PbTlTe as a function of thallium concentr…
Mass enhancement in multiple bands approaching optimal doping in a high-temperature superconductor
C. M. Moir, Scott C. Riggs, J. A. Galvis +7
Pnictides provide an opportunity to study the effects of quantum criticality in a multi-band high temperature superconductor. Quasiparticle mass divergence near optimal doping, obs…
Inverse correlation between quasiparticle mass and Tc in a cuprate high-Tc superconductor
C. Putzke, L. Malone, S. Badoux +8
Close to a zero temperature transition between ordered and disordered electronic phases, quantum fluctuations can lead to a strong enhancement of the electron mass and to the emerg…
Superconducting gap structure of BaFe_2(As_{1-x}P_{x})_2
L. Malone, Y. Mizukami, P. Walmsley +5
We present a study of the superconducting gap structure in the iron-pnictide series BaFe2(As1-xPx)2. By measuring the variation of the specific heat as a function of temperature an…
Anomalous critical fields in quantum critical superconductors
C. Putzke, P. Walmsley, J. D. Fletcher +12
Fluctuations around an antiferromagnetic quantum critical point (QCP) are believed to lead to unconventional superconductivity and in some cases to high-temperature superconductivi…
Quasiparticle mass enhancement close to the quantum critical point in BaFe(AsP)
P. Walmsley, C. Putzke, L. Malone +11
We report a combined study of the specific heat and de Haas-van Alphen effect in the iron-pnictide superconductor BaFe(AsP). Our data when combined with results…
A Sharp Peak of the Zero-Temperature Penetration Depth at Optimal Composition in BaFe2(As1-xPx)2
K. Hashimoto, K. Cho, T. Shibauchi +14
In a superconductor, the ratio of the carrier density, , to their effective mass, , is a fundamental property directly reflecting the length scale of the superfluid flow, t…
Superconducting critical field far above the Pauli limit in one-dimensional LiMoO
J. -F. Mercure, A. F. Bangura, Xiaofeng Xu +5
The upper critical field of purple bronze LiMoO is found to exhibit a large anisotropy, in quantitative agreement with that expected from the observed e…