Hanming Ma
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View article: Pressure-Driven Semiconductor-to-Metal, Magnetic, and Structural Transitions in the Ferrimagnetic Semiconductor Mn<sub>3</sub>Si<sub>2</sub>Te<sub>6</sub>
Pressure-Driven Semiconductor-to-Metal, Magnetic, and Structural Transitions in the Ferrimagnetic Semiconductor Mn<sub>3</sub>Si<sub>2</sub>Te<sub>6</sub> Open
Mn 3 Si 2 Te 6 is a ferrimagnetic nodal-line semiconductor with colossal angular magnetoresistance at ambient pressure. In this work, we investigated the effect of hydrostatic pressure on its electrical transport properties, magnetic trans…
View article: Strong superconducting pairing strength and pseudogap features in a putative multiphase heavy-fermion superconductor CeRh2As2 by soft point-contact spectroscopy
Strong superconducting pairing strength and pseudogap features in a putative multiphase heavy-fermion superconductor CeRh2As2 by soft point-contact spectroscopy Open
CeRh2As2 is a newly discovered candidate of multiphase heavy-fermion superconductor (Tc=0.3 K) with intriguing physical properties. Here, we employ soft point-contact spectroscopy to investigate its energy gap behaviors in both the normal …
View article: Combined x-ray diffraction, electrical resistivity, and <i>ab initio</i> study of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mrow><mml:mtext>(TMTTF)</mml:mtext></mml:mrow><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi>PF</mml:mi><mml:mn>6</mml:mn></mml:msub></mml:mrow></mml:math> under pressure: Implications for the unified phase diagram
Combined x-ray diffraction, electrical resistivity, and <i>ab initio</i> study of under pressure: Implications for the unified phase diagram Open
We present a combined experimental and theoretical study on the quasi-one-dimensional organic conductor (TMTTF)2PF6, and elucidate the variation of its physical properties under pressure. We fully resolve the crystal structure by single cr…
View article: Bulk high-temperature superconductivity in the high-pressure tetragonal phase of bilayer La2PrNi2O7
Bulk high-temperature superconductivity in the high-pressure tetragonal phase of bilayer La2PrNi2O7 Open
The Ruddlesden-Popper (R-P) bilayer nickelate, La3Ni2O7, was recently found to show signatures of high-temperature superconductivity (HTSC) at pressures above 14 GPa. Subsequent investigations achieved zero resistance in single- and poly-c…
View article: Doping-tunable Fermi surface with persistent topological Hall effect in axion candidate EuIn$_2$As$_2$
Doping-tunable Fermi surface with persistent topological Hall effect in axion candidate EuIn$_2$As$_2$ Open
Rare-earth Zintl compound EuIn$_2$As$_2$ has been theoretically recognized as a candidate for realizing an intrinsic antiferromagnetic (AFM) bulk axion insulator and a higher-order topological state, which provides a fertile platform to ex…
View article: Pressure-induced nearly perfect rectangular lattice and superconductivity in an organic molecular crystal (DMET-TTF)$_2$AuBr$_2$
Pressure-induced nearly perfect rectangular lattice and superconductivity in an organic molecular crystal (DMET-TTF)$_2$AuBr$_2$ Open
External pressure and associated changes in lattice structures are key to realizing exotic quantum phases such as high-$T_{\rm c}$ superconductivity. While applying external pressure is a standard method to induce novel lattice structures,…
View article: Combined X-ray diffraction, electrical resistivity, and $ab$ $initio$ study of (TMTTF)$_2$PF$_6$ under pressure: implications to the unified phase diagram
Combined X-ray diffraction, electrical resistivity, and $ab$ $initio$ study of (TMTTF)$_2$PF$_6$ under pressure: implications to the unified phase diagram Open
We present a combined experimental and theoretical study on the quasi-one-dimensional organic conductor (TMTTF)$_2$PF$_6$, and elucidate the variation of its physical properties under pressure. We fully resolve the crystal structure by sin…
View article: Observation of high-temperature superconductivity in the high-pressure tetragonal phase of La2PrNi2O7-δ
Observation of high-temperature superconductivity in the high-pressure tetragonal phase of La2PrNi2O7-δ Open
The recent discovery of high-temperature superconductivity in the Ruddlesden-Popper phase La3Ni2O7 under high pressure marks a significant breakthrough in the field of 3d transition-metal oxide superconductors. For an emerging novel class …
View article: Pressure-induced superconductivity in polycrystalline La3Ni2O7
Pressure-induced superconductivity in polycrystalline La3Ni2O7 Open
We synthesized polycrystalline La3Ni2O7 samples by using the sol-gel method without post-annealing under high oxygen pressure, and then measured temperature-dependent resistivity under various hydrostatic pressures up to 14.5 GPa in a cubi…
View article: Fermi surface reconstruction due to the orthorhombic distortion in Dirac semimetal YbMnSb$_2$
Fermi surface reconstruction due to the orthorhombic distortion in Dirac semimetal YbMnSb$_2$ Open
Dirac semi-metal with magnetic atoms as constituents delivers an interesting platform to investigate the interplay of Fermi surface (FS) topology, electron correlation, and magnetism. One such family of semi-metal is YbMn$Pn_2$ ($Pn$ = Sb,…
View article: Investigation of the atomic coordinates of CeNiC$_2$ under pressure: switching of the Ce-Ce first nearest neighbor direction
Investigation of the atomic coordinates of CeNiC$_2$ under pressure: switching of the Ce-Ce first nearest neighbor direction Open
When pressurized, the heavy fermion compound CeNiC$_2$ reveals a rich electronic phase diagram and shows unconventional superconductivity with a transition temperature $T_c$ $\sim$ 3.7 K, the highest among Ce-based heavy fermion supercondu…
View article: Pressure Induced Superconductivity and Multiple Structural Transitions in CsCl-Type Cubic CeZn Single Crystal
Pressure Induced Superconductivity and Multiple Structural Transitions in CsCl-Type Cubic CeZn Single Crystal Open
CsCl-type cubic compound CeZn exhibits a paramagnetic (PM) to antiferromagnetic (AFM) first-order transition at TN ~ 30 K accompanied by a simultaneous structural transition from cubic to tetragonal structure as temperature decreases. Appl…