135 citations · 255 across the 12 of their papers we have counts for
12 papers
Observation of suppressed viscosity in the normal state of He due to superfluid fluctuations
Rakin N. Baten, Yefan Tian, Eric N. Smith +2
By monitoring the quality factor of a quartz tuning fork oscillator we have observed a fluctuation-driven reduction in the viscosity of bulk He in the normal state near the sup…
Supercooling of the A phase of He
Yefan Tian, Dmytro Lotnyk, Anna Eyal +9
Because of the extreme purity, lack of disorder, and complex order parameter, the first-order superfluid He A-B transition is the leading model system for first order transitio…
NMR determination of Van Hove singularity and Lifshitz transitions in nodal-line semimetal ZrSiTe
Yefan Tian, Yanglin Zhu, Rui Li +2
We have applied nuclear magnetic resonance spectroscopy to study the distinctive network of nodal lines in the Dirac semimetal ZrSiTe. The low- behavior is dominated by a symmet…
Gap-opening transition in Dirac semimetal ZrTe
Yefan Tian, Nader Ghassemi, Joseph H. Ross
We apply Te nuclear magnetic resonance (NMR) spectroscopy to investigate the Dirac semimetal ZrTe. With the NMR magnetic field parallel to the -axis, we observe sign…
Path-Dependent Supercooling of the He Superfluid A-B transition
Dmytro Lotnyk, Anna Eyal, Nikolay Zhelev +7
We examine the discontinuous first-order superfluid He A to B transition in the vicinity of the polycritical point (2.232 mK and 21.22 bar). We find path-dependent transitions:…
Topological nodal line in ZrTe demonstrated by nuclear magnetic resonance
Yefan Tian, Nader Ghassemi, Joseph H. Ross
In this work, we report nuclear magnetic resonance (NMR) combined with density functional theory (DFT) studies of the transition metal dichalcogenide ZrTe. The measured NMR shi…
Half-Heusler thermoelectric materials: NMR studies
Yefan Tian, Nader Ghassemi, Wuyang Ren +6
We report Co, Nb, and Sb nuclear magnetic resonance (NMR) measurements combined with density functional theory (DFT) calculations on a series of half-Heusler…
Accelerated design of Fe-based soft magnetic materials using machine learning and stochastic optimization
Yuhao Wang, Yefan Tian, Tanner Kirk +5
Machine learning was utilized to efficiently boost the development of soft magnetic materials. The design process includes building a database composed of published experimental re…
Defect charging and resonant levels in half-Heusler NbTiFeSb
Yefan Tian, Farit G. Vagizov, Nader Ghassemi +5
We report Nb and Sb NMR and Fe Mössbauer studies combined with DFT calculations of NbTiFeSb (), one of the most promisi…
Copper ion dynamics and phase segregation in Cu-rich tetrahedrite: an NMR study
Nader Ghassemi, Yefan Tian, Xu Lu +3
Cu NMR measurements are reported for the Cu-rich phase of \ch{Cu_{12+x}Sb4S13} () and compared to \ch{Cu12Sb4S13}. We identify the NMR signatures of the phase…
Charge-carrier behavior in Ba-, Sr- and Yb-filled CoSb: NMR and transport studies
Yefan Tian, Ali A. Sirusi, Sedat Ballikaya +3
We report Co NMR and transport measurements on -type filled skutterudites BaYbCoSb and CoSb (= Ba, Sr), promising thermoelectric m…
Dirac electron behavior and NMR evidence for topological band inversion in ZrTe5
Yefan Tian, Nader Ghassemi, Joseph H. Ross
We report Te NMR measurements of the topological quantum material ZrTe. Spin-lattice relaxation results, well-explained by a theoretical model of Dirac electron systems…