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Calorimetry experiments under high pressure were used to clarify the interplay between different states such as superconductivity and antiferromagnetism in CeRhIn5, spin density wave and large moment antiferromagnetism in URu2Si2. Evidences…

强关联电子 · 物理学 2009-11-11 G. Knebel , K. Izawa , F. Bourdarot , E. Hassinger , B. Salce , D. Aoki , J. Flouquet

Strongly correlated Fermi systems are fundamental systems in physics that are best studied experimentally, which until very recently have lacked theoretical explanations. This review discusses the construction of a theory and the analysis…

强关联电子 · 物理学 2010-06-30 V. R. Shaginyan , M. Ya. Amusia , A. Z. Msezane , K. G. Popov

Strongly correlated electrons at the verge of quantum criticality give rise to unconventional phases of matter and behaviors, with the discovery of new quantum critical materials driving synergistic advances in both experiments and theory.…

强关联电子 · 物理学 2025-01-15 Jiawen Zhang , Jinyu Wu , Ye Chen , Rui Li , Michael Smidman , Yu Liu , Yu Song , Huiqiu Yuan

Ubiquity of unconventional phenomena observed in a series of heavy fermion metals is discussed on the basis of an idea of critical valence fluctuations. After surveying experimental aspects of these unconventional behaviors in prototypical…

强关联电子 · 物理学 2017-04-04 K. Miyake , S. Watanabe

A simple model describing the Nernst-Ettingshausen effect (NEE) in two-component electronic liquids is formulated. The examples considered include graphite, where the normal and Dirac fermions coexist, superconductor in fluctuating regime,…

超导电性 · 物理学 2015-05-13 Andrey A. Varlamov , Alexey V. Kavokin

In amorphous superconducting thin films of $Nb_{0.15}Si_{0.85}$ and $InO_x$, a finite Nernst coefficient can be detected in a wide range of temperature and magnetic field. Due to the negligible contribution of normal quasi-particles,…

超导电性 · 物理学 2015-05-13 A. Pourret , P. Spathis , H. Aubin , K. Behnia

URu$_2$Si$_2$ is surely one of the most mysterious of the heavy-fermion compounds. Despite more than twenty years of experimental and theoretical works, the order parameter of the transition at $T_0 = 17.5$ K is still unknown. The state…

强关联电子 · 物理学 2012-03-06 G. W. Scheerer , W. Knafo , D. Aoki , G. Ballon , A. Mari , D. Vignolles , J. Flouquet

An unconventional pairing mechanism in the heavy-fermion material $\mathrm{URu_{2}Si_{2}}$ is studied. We propose a mixed singlet-triplet $d$-density wave to be the hidden-order state in $\mathrm{URu_{2}Si_{2}}$. The exotic order is…

强关联电子 · 物理学 2014-10-20 Chen-Hsuan Hsu , Sudip Chakravarty

In the ferrimagnetic nodal-line semiconductor Mn$_3$Si$_2$Te$_6$, colossal magnetoresistance (CMR) arises below $T_\mathrm{c}=78$ K due to the interplay of magnetism and topological nodal-line fermiology. The Berry curvature associated with…

A phenomenological model for the 'hidden order' transition in the heavy Fermion material URu$_2$Si$_2$ is introduced. The 'hidden order' is identified as an incommensurate, momentum-carrying hybridization between the light hole band and the…

强关联电子 · 物理学 2015-05-20 Y. Dubi , Alexander V. Balatsky

Experiments on underdoped cuprate superconductors suggest an intricate relation between the normal-state Nernst effect and stripe order: The Nernst signal appears enhanced near 1/8 hole doping and its onset temperature scales with the…

强关联电子 · 物理学 2010-01-06 Andreas Hackl , Matthias Vojta , Subir Sachdev

Layered van der Waals tellurides reveal topologically non-trivial properties that give rise to unconventional magneto-transport phenomena. Additionally, their semimetallic character with high mobility makes them promising candidates for…

The Nernst effect has recently proven a sensitive probe for detecting unusual normal state properties of unconventional superconductors. In particular, it may sensitively detect Fermi surface reconstructions which are connected to a charge…

超导电性 · 物理学 2015-06-04 Christian Hess

Magnetic fluctuations is the leading candidate for pairing in cuprate, iron-based and heavy fermion superconductors. This view is challenged by the recent discovery of nodeless superconductivity in CeCu$_2$Si$_2$, and calls for a detailed…

The Seebeck and Nernst coefficients $S$ and $\nu$ of the cuprate superconductor YBa$_2$Cu$_3$O$_y$ (YBCO) were measured in a single crystal with doping $p = 0.12$ in magnetic fields up to H = 28 T. Down to T=9 K, $\nu$ becomes independent…

Ultrathin FeSe films on SrTiO3 substrate show interface-enhanced superconductivity. However, how the superconductivity is established including superconducting fluctuations remains unclear. This study investigates the Nernst effect, which…

超导电性 · 物理学 2025-10-20 Tomoki Kobayashi , Ryo Ogawa , Atsutaka Maeda

We present a ^{115}In NMR study of the quasi two-dimensional heavy-fermion superconductor CeCoIn_5 believed to host a Fulde-Ferrel-Larkin-Ovchinnkov (FFLO) state. In the vicinity of the upper critical field and with a magnetic field applied…

超导电性 · 物理学 2009-11-10 K. Kakuyanagi , M. Saito , K. Kumagai , S. Takashina , M. Nohara , H. Takagi , Y. Matsuda

In our mini-review, we address manifestations of $T/B$ scaling behavior of heavy-fermion (HF) compounds, where $T$ and $B$ are respectively temperature and magnetic field. Using experimental data and the fermion condensation theory, we show…

强关联电子 · 物理学 2020-11-20 V. R. Shaginyan , A. Z. Msezane , J. W. Clark , G. S. Japaridze , Y. S. Leevik

Analogous to the Hall effect, the Nernst effect is the generation of a transverse voltage due to a temperature gradient in the presence of a perpendicular magnetic field. The Nernst effect has promise for thermoelectric applications and as…

强关联电子 · 物理学 2021-04-20 T. Asaba , V. Ivanov , S. M. Thomas , S. Y. Savrasov , J. D. Thompson , E. D. Bauer , F. Ronning

Charge density-wave order has been observed in cuprate superconductors whose crystal structure breaks the square symmetry of the CuO2 planes, such as orthorhombic YBa2Cu3Oy (YBCO), but not so far in cuprates that preserve that symmetry,…