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Density function theory is the workhorse of modern electronic structure theory. However, its accuracy in practical calculations is limited by the choice of the exchange-correlation potential. In this respect, two-dimensional materials pose…

材料科学 · 物理学 2026-04-29 Michael Lorke

NdFeAs(O,F) thin films having different fluorine contents were grown on 5 deg. or 10 deg. vicinal cut MgO and CaF2 single crystalline substrates by molecular beam epitaxy. Structural characterisations by reflection high-energy electron…

超导电性 · 物理学 2020-03-23 Kazumasa Iida , Takuya Matsumoto , Keisuke Kondo , Takafumi Hatano , Hiroshi Ikuta

We present thermodynamic and transport properties of transition-metal (T) arsenides, TAs with T = Sc to Ni (3d), Zr, Nb, Ru (4d), Hf and Ta (5d). Characterization of these binaries is made with powder X-ray diffraction, temperature and…

超导电性 · 物理学 2012-07-19 B. Saparov , J. E. Mitchell , A. S. Sefat

We investigate emergent superconductivity and non-reciprocal transport (magnetochiral anisotropy, superconducting diode effect) at the heterointerface of two non-superconducting van der Waals (vdW) materials, the Dirac semimetal ZrTe$_2$…

Me$_{3+\delta}$Ge, being a Weyl semimetal, shows a large anomalous Hall effect (AHE), which decreases slowly with an increase in $\delta$ from 0.1 to 0.4. However, AHE in this compound remains significantly large in the whole range of…

Unidirectional in-plane structural anisotropy in Rhenium-based transition metal dichalcogenides (TMDs) introduces a new class of 2-D materials, exhibiting anisotropic optical properties. In this work, we perform temperature dependent,…

介观与纳米尺度物理 · 物理学 2020-10-21 Avijit Dhara , Devarshi Chakrabarty , Pritam Das , Aswini K. Pattanayak , Shreya Paul , Shreyashi Mukherjee , Sajal Dhara

The optical properties of a large, detwinned single crystal of BaFe$_2$As$_2$ have been examined over a wide frequency range above and below the structural and magnetic transition at $T_{\rm N}\simeq 138$ K. Above $T_{\rm N}$ the real part…

强关联电子 · 物理学 2020-11-12 Christopher C. Homes , Thomas Wolf , Christoph Meingast

Transition metal dichalcogenides (TMDs) attract significant attention due to their exceptional optical and excitonic properties. It was understood already in the 1960s, and recently rediscovered, that many TMDs possess high refractive index…

光学 · 物理学 2022-03-28 Battulga Munkhbat , Piotr Wróbel , Tomasz J. Antosiewicz , Timur Shegai

Discovery and observations of exotic, quantized optical and electrical responses have sparked renewed interest in nonmagnetic chiral crystals. Within this class of materials, six group V transition metal ditetrelides, that is, XY$_2$ (X =…

超导电性 · 物理学 2021-10-04 Christina A. C. Garcia , Dennis M. Nenno , Georgios Varnavides , Prineha Narang

This article reports the successful synthesis of single crystalline two-dimensional thin flakes of NbSe$_2$. The XRD pattern of the grown crystal ensured its crystallization in a single phase with a hexagonal structure. The EDAX endorsed…

超导电性 · 物理学 2024-06-28 N. K. Karn , M. M. Sharma , I. Felner , V. P. S. Awana

In-plane longitudinal and transverse thermoelectric phenomena in two parent compounds of iron-based superconductors are studied. Namely, the Seebeck (S) and Nernst (n) coefficients were measured in the temperature range 10 - 300 K for…

超导电性 · 物理学 2018-03-21 Marcin Matusiak , Michal Babij , Thomas Wolf

We investigate the universal electronic transport for a mixed $d_{x^2-y^2}$+s-wave superconductor in the presence of an anisotropic elliptical Fermi surface. Similar to the universal low-temperature transport predicted in a…

超导电性 · 物理学 2009-10-31 W. C. Wu , D. Branch , J. P. Carbotte

Anisotropy is ubiquitous in solids and enhanced in low-dimensional materials. In response to an electromagnetic wave, anisotropic absorptive and refractive properties result in dichroic and birefringent optical phenomena both in the linear…

材料科学 · 物理学 2013-12-03 T. Arikawa , Q. Zhang , L. Ren , A. A. Belyanin , J. Kono

The anisotropic superconducting properties of a Rb(x)Fe(2-y)Se(2) single crystal with transition temperature 32 K were investigated by means of SQUID and torque magnetometry, probing the effective magnetic penetration depth and the magnetic…

超导电性 · 物理学 2012-02-23 S. Bosma , R. Puzniak , A. Krzton-Maziopa , M. Bendele , E. Pomjakushina , K. Conder , H. Keller , S. Weyeneth

Structural anisotropy in layered two-dimensional materials can lead to highly anisotropic optical absorption which, in turn, can profoundly a^ect their phonon modes. These e^ects include lattice orientation-dependent and excitation…

Regulation of electronic structure and mobility cut-on rate in two-dimensional transition metal dichalcogenides (TMDs) has attracted much attention because of its potential in electronic device design. The anisotropic Raman scattering and…

介观与纳米尺度物理 · 物理学 2017-03-08 Z. H. Zhou , B. C. Wei , Y. M. Min , L. Z. Liu

Transition metal dichalcogenide, especially MoS2 has attracted lot of attention recently owing to its tunable visible range band gap and anisotropic electronic and transport properties. Here, we report a comprehensive inelastic light…

材料科学 · 物理学 2020-08-26 Deepu Kumar , Birender Singh , Rahul Kumar , Mahesh Kumar , Pradeep Kumar

Indium selenide is a phase-change chalcogenide whose polymorphism enables a variety of physical properties to be tuned. Here we directly quantify the evolution of the surface work function across the amorphous-to-crystalline transition in…

材料科学 · 物理学 2025-10-13 Marius O. Eji , Md. Sakauat Hasan Sakib , Joseph P. Corbett

We report anisotropic resistivity measurements of the heavy-fermion superconductor CeRh$_2$As$_2$ in magnetic fields up to 16 T and temperatures down to 0.35 K. The measured CeRh$_2$As$_2$ resistivity shows a signature corresponding to the…

超导电性 · 物理学 2022-10-25 Sanu Mishra , Yu Liu , Eric D. Bauer , Filip Ronning , Sean. M. Thomas

Transport measurements on the two dimensional electron system in Al2O3 SrTiO3 heterostructures indicate significant noncrystalline anisotropic behavior below T = 30 K. Lattice dislocations in SrTiO3 and interfacial steps are suggested to be…

强关联电子 · 物理学 2017-08-02 K. Wolff , R. Schäfer , M. Meffert , D. Gerthsen , R. Schneider , D. Fuchs